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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Civil Engineers
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Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 33, Issue 6 - Nov 2013
Volume 33, Issue 5 - Sep 2013
Volume 33, Issue 4 - Jul 2013
Volume 33, Issue 3 - May 2013
Volume 33, Issue 2 - Mar 2013
Volume 33, Issue 1 - Jan 2013
Selecting the target year
A Study on Live Load Design Standards Considering Moving Load (For Shorter than 60m Span)
Jin, Kyung Seok ; Han, Man Yop ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1261~1270
DOI : 10.12652/Ksce.2013.33.4.1261
The current domestic design criteria of live load employs DL-24 load and DB-24 load. Particularly for long span bridges above 45meters, DL-24 load is forced to apply and design them, since the shearing force and the moment of DL-24 load appears more dominate than those of DB-24. But it appeared that this DL-24 load didn`t meet the vehicles traveling load, which affected bridges in real use. Hence this paper defined ML-24 load similar to the load applied to real bridges and also defined a new live load model, RL-24 load, after adjusting the existing DL-24 load, which doesn`t meet the moment and the shearing force of ML-24. As the result of applying and reviewing RL-24 load to simple bridges of span of 45~60m, the results satisfying both the moment and the shearing force applied to bridges in real use by traveling load were attained. Besides, the applicability of it was examined in comparison with live load models of home and abroad.
Estimation of Basic Wind Speed at Bridge Construction Site Based on Short-term Measurements
Lee, Seong-Lo ; Kim, Sang-Woo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1271~1279
DOI : 10.12652/Ksce.2013.33.4.1271
In this paper, a study on the prediction method of basic wind speed at the construction site of long-span bridge using short-term measurements was conducted. To determine the basic wind speed in the wind resistant design for the long-span bridge away from the weather station, statistical analysis of long-term data at site is required. Wind observation mast was installed at site, and short-term measurements were gathered and the correlation analysis between the site and the station was done using regression analysis and MCP(Measure-Correlate-Predict). The long-term wind data of the site was obtained from correlation formula after topographical revision of long-term data of the station. And basic wind speed could be estimated by extreme probability distribution analysis. The research results show that the wind speed by regression analysis is predicted lower than by MCP and after this study a series of correlation analyses at several sites will show clearly the difference two methods. And also a quality control of long-term wind data is very important in estimation of wind speed.
Behavior Analysis of PPWS Sockets for Suspension Bridges Considering Frictional Contact
Yoo, Hoon ; Lee, Sung-Hyung ; Seo, Ju-Won ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1281~1293
DOI : 10.12652/Ksce.2013.33.4.1281
A sophisticated finite element model is illustrated to analyze the behavior of Prefabricated Parallel Wire Strand(PPWS) sockets for main cables of suspension bridges. An orthotropic model is proposed for the casting material by considering both effects of individual wires and a casting alloy, and the contact between surfaces of a socket and a casting alloy is idealized by using the Coulomb friction and the surface-based contact model. The proposed FE model is verified by comparing the strain distributions obtained from the tensile test and FE analysis. The mechanical behavior of a socket is investigated with respect to the variation of the frictional coefficient. The result shows that the friction between surfaces significantly diminishes the stress concentration of a socket and a casting alloy, and the normal stress from the design equation represents the averaged value of the upper and lower quartiles in the distribution of contact stresses between a socket and a casting alloy.
Estimation of Structural Deformed Shapes Using Limited Number of Displacement Measurements
Choi, Junho ; Kim, Seungjun ; Han, Seungryong ; Kang, Youngjong ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1295~1302
DOI : 10.12652/Ksce.2013.33.4.1295
The structural deformed shape is important information to structural analysis. If the sufficient measuring points are secured at the structural monitoring system, reasonable and accurate structural deformation shapes can be obtained and structural analysis is possible using this deformation. However, the accurate estimation of the global structural shapes might be difficult if sufficient measuring points are not secure under cost limitations. In this study, SFSM-LS algorithm, the economic and effective estimation method for the structural deformation shapes with limited displacement measuring points is developed and suggested. In the suggested method, the global structural deformation shape is determined by the superposition of the pre-investigated structural deformed shapes obtained by preliminary FE analyses, with their optimum weight factors which lead minimization of the estimate errors. 2-span continuous bridge model is used to verify developed algorithm and parametric studies are performed. By the parametric studies, the characteristics of the estimation results obtained by the suggested method were investigated considering essential parameters such as pre-investigated structural shapes, locations and numbers of displacement measuring points. By quantitative comparison of estimation results with the conventional methods such as polynomial, Lagrange and spline interpolation, the applicability and accuracy of the suggested method was validated.
Analysis of the Internal Forces of the Rail Supports for the Serviceability of Concrete Slab Track Bridge
Choi, Jun-Hyeok ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1303~1313
DOI : 10.12652/Ksce.2013.33.4.1303
In this study, the reference values for the internal forces of the rail supports caused by a wheel load, a unit vertical displacement, a unit end rotation in examination of the serviceability of concrete slab track bridge were obtained. In analysis, the analysis models of which the rail was continuously and discretely supported by elastic springs were used. The internal forces of the rail supports from the analysis were compared with the results provided in the DS 804 regulations and agreed with well. In addition, the effects of the space between the rail supports and the stiffness of fastener on the internal forces of the rail supports were investigated.
Preliminary Structural Form Planning for Suspension Bridge According to Force Flow
Kim, Namhee ; Koh, Hyun-Moo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1315~1326
DOI : 10.12652/Ksce.2013.33.4.1315
Geometric form of a suspension bridge that uses load-sensitive cables takes on not only resisting loads but also becoming a visually sensible shillouette. This study has proposed a preliminary structural form planning for a suspension bridge following force flow by adopting the two possibilities of the graphic statics. First, the force polygon allows alternative load paths for the same loading condition. Second, a new structural form for the newly developed load path can be constructed using the reciprocal principle that exits between a structure space and the corresponding force polygon. Major structural form parameters that affect both structural and aesthetic aspecs are first identified. The relationships between structural forms and the corresponding force polygons are then investigated for the identified parameters. Upon the investigation, a stepwise process is developed for a preliminary structural form planning for a suspension bridge. The proposed structural form planning method is general that can be easily expanded to generate design alternatives of similar form-active structural systems. It is also expected that this method will be used as an educational tool to explain the interrelationships between structural forms and their force flows.
Effects of Corrugated Webs on the Ultimate Behavior of Horizontally Curved I-shaped Girders
Kim, Seungjun ; Han, Taek Hee ; Won, Deok Hee ; Kang, Young Jong ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1327~1336
DOI : 10.12652/Ksce.2013.33.4.1327
In this study, the effects of corrugated webs on the ultimate behavior of horizontally curved I-shaped girders are investigated. Because of the geometric characteristics of corrugated plates, corrugated webs can be used for enhancing torsional and warping stiffness of plate girders. Many researches have been conducted to study the effects of corrugated webs on the ultimate behavior of straight girders. But, the studies of the ultimate behavior of horizontally curved girders with corrugated webs, which generally show out-of plane behavior manly, have been rarely performed so far. By performing inelastic-nonlinear analysis, the ultimate behavior of curved girders with corrugated webs is studied in this paper. Laterally unsupported length and subtended angle of girders, and length of height of corrugation of webs are considered as the geometric parameters which would be expected to affect the ultimate behavior. By this analytical study with considering the geometric parameters, the changes of ultimate behavior and load carrying capacity of curved girders with corrugated webs are investigated. Also, the effects of corrugated webs on the increase of load carrying capacity for curved girders are studied with comparing to the capacity of general curved girders with flat webs. According to the analytical results, corrugated webs can be used to increase the ultimate load carrying capacity of curved girders, because of their high torsional and warping stiffness. But, it is also indicated that they may decrease the load carrying capacity of curved girders which have relatively small subtended angle or initial curvature, because of an accordion effect.
Parametric Analysis on Ultimate Behavior of Cylindrical GFRP Septic Tank
Kim, Sung Bo ; Cho, Kwang Je ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1337~1347
DOI : 10.12652/Ksce.2013.33.4.1337
The parametric analysis on ultimate behavior of buried cylindrical GFRP(Glass Fiber Reinforced Polymer) septic tank was presented. Two kinds of F.E. analysis model(soil-spring model and 3D full model) was constructed. The ultimate behavior of septic tank was investigated according to the size of stiffened steel ring and properties of underground soil. Ramberg-Osgood model and Druker-Prager model were used for material nonlinear characteristics of GFRP septic tank and soil, respectively. The diameter and thickness of stiffened steel ring inside septic tank, elastic modulus and internal friction angle of soil were selected for parametric variables. The ultimate behavior of septic tank, load-displacement, axial and hoop strain, were calculated and investigated.
Stress Analysis of PS Anchorage Zone Using Ultra High Performance Concrete
Kim, Jee Sang ; Choi, Yoon Seok ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1349~1360
DOI : 10.12652/Ksce.2013.33.4.1349
The post-tensioned anchorage zones of normal concrete have larger cross sections because of congested reinforcements to resist high bearing and bursting stresses. The high compressive and tensile strength of newly developed UHPC (Ultra High Performance Concrete) may reduce the cross sectional dimensions and simplify the reinforcement details, if used for post-tensioned members. The Finite Element Analysis was performed to evaluate the mechanical behavior of post-tensioned anchorage zones using UHPC without anchorage plates and confining reinforcements. The results show that the maximum bursting stresses are less than the values given in current design code without failure due to vertical cracks. The location of maximum bursting stresses were at 0.2 times of width of the models. The bursting force from FEA is less than that is obtained using simplified formular in Korean Bridge Design Code.
Estimation of Design Discharge Considering Nonstationarity for River Restoration in the Mokgamcheon
Lee, Kil Seong ; Oh, Jin-Ho ; Park, Kidoo ; Sung, Jang-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1361~1375
DOI : 10.12652/Ksce.2013.33.4.1361
The design flow considering nonstationarity is estimated to determine the design flood related to hydraulic structure quantitatively based on the design process for stream restoration in the Mokgamcheon watershed proposed by Lee et al. (2011). The purpose of this research is to suggest new ways that the design flood was calculated considering nonstationarity at the Mokgamcheon watershed. Storm-unit hydrograph method to calculate design flood and direct frequency analysis were applied and nonstationarity was considered for the frequency analysis through extRemes toolkit developed at NCAR (National Center for Atmospheric Research). Although the method of direct flood frequency analysis due to dealing with flowrates directly has a more reliable than strom-unit hydrograph method, as a result, the method of direct flood frequency analysis underestimated the design flood than strom-unit hydrograph method due to the characteristics of the flow data. Therefore, the flood of storm-unit hydrograph method (100 years frequency) was determined as the design flood in the Mokgamcheon watershed.
Retardation Effect on the Breach of the Earth Filled Embankment Using the Stiffener During Overtopping
Joo, Yo Han ; Yeo, Chang-Geon ; Lee, Seung Oh ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1377~1387
DOI : 10.12652/Ksce.2013.33.4.1377
Most embankment of the reservoirs (99.1 %) have been constructed in the earth filled type in Korea because the construction of this type is less expensive and simpler than others such as concrete one. However, it has to be reinforced the slope to prevent the breach due to overtopping or piping under unexpected flood conditions. This study has been analyzed the retardation effect using three types (L, T,
shape) of stiffener in order to reinforce embankment when they are collapsed by overtopping flow. Experimental results showed that L-type stiffener is the most effective in delaying the breaching of embankment and reducing the soil erosion when compared with others. The reinforced embankment breaching showed that time delay was occurred about 1.73 to 2.29 times and the peak flowrate was reduced compared to non-stiffener embankments due to energy dissipation by collision and less soil erosion. The embankment breaching mostly leads to major damages because of the lack of repair time. Thus, since these stiffeners can resist the rapid breach, it would be possible to earn the time to emergency repair and lifesaving, as well as reduction of damages of embankment in downward region with decreasing peak flowrate. Results from this study would be used for the basis when establishing the emergency action plan for the reservoirs on the verge of hazard.
Development of Operating Rule Curve for Multipurpose Water Supply in Heightened Agricultural Reservoir
Park, Jong-Yoon ; Jung, In-Kyun ; Lee, Kwang-Ya ; Kim, Seong-Joon ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1389~1400
DOI : 10.12652/Ksce.2013.33.4.1389
This study developed an operating rule curve (ORC) for multipurpose water supply (irrigation and environmental water) in heightened agricultural reservoir. Among the 20 reservoirs in improvement project of agricultural reservoir dam heightening, the 4 representative reservoirs (Ungyang, Gungchon, Yongam and Unam) were selected for the study according to the analysis of statistical characteristics. Available environmental water supply amounts during irrigation and non-irrigation periods, which is the range from release restricted water level to high water level were estimated by water balance analysis using reservoir operation model. Reliability, resiliency and vulnerability criteria for water system performance were used to assess the multiple water supply capacity. The ORC was presented as the percentile rank for the daily reservoir water level from the results of reservoir operation using the past couple of decades weather data. The water levels for each percentile were divided into 3 buffer sections representing drought (5~25%), normal (25~75%), and flood (75~95%) year to operate the heightened agricultural reservoir with ORC.
A Study on Dynamic Water Quality Change for Gate Operation in Seonakdong River
Kim, Jung Min ; Kim, Young Do ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1401~1411
DOI : 10.12652/Ksce.2013.33.4.1401
The inflow from Daejeo gate and the outflow from Noksan gate in Seonakdong river, which is a reservoir-like river with the characteristics of stagnant water, is very important for TMDLs (Total Maximum Daily Load) of Nakbon N unit watershed. However, there are very few measured data for calculating base flow. The operating data is much different from the actual measured data because the probable maximum flowrate is used for gate operation. In this study, the operating flowrate data of Daejeo and Noksan gates are compared with the monthly water quality data from Ministry of Environment monitoring station. The dynamic change of the flowrate and the water quality is also measured for the operation of Daejeo and Noksan gates. The flowrate of Seonakdong river is measured, which is affected by the gate operation, the water elevation difference of Nakdong river and Seonakdong river, and the tidal elevation. The results of this study can be used for establishing the water quality improvement measures by the optimal gate operation.
Analysis of Impact of Hydrologic Data on Neuro-Fuzzy Technique Result
Ji, Jungwon ; Choi, Changwon ; Yi, Jaeeung ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1413~1424
DOI : 10.12652/Ksce.2013.33.4.1413
Recently, the frequency of severe storms increases in Korea. Severe storms occurring in a short time cause huge losses of both life and property. A considerable research has been performed for the flood control system development based on an accurate stream discharge prediction. A physical model is mainly used for flood forecasting and warning. Physical rainfall-runoff models used for the conventional flood forecasting process require extensive information and data, and include uncertainties which can possibly accumulate errors during modelling processes. ANFIS, a data driven model combining neural network and fuzzy technique, can decrease the amount of physical data required for the construction of a conventional physical models and easily construct and evaluate a flood forecasting model by utilizing only rainfall and water level data. A data driven model, however, has a disadvantage that it does not provide the mathematical and physical correlations between input and output data of the model. The characteristics of a data driven model according to functional options and input data such as the change of clustering radius and training data length used in the ANFIS model were analyzed in this study. In addition, the applicability of ANFIS was evaluated through comparison with the results of HEC-HMS which is widely used for rainfall-runoff model in Korea. The neuro-fuzzy technique was applied to a Cheongmicheon Basin in the South Han River using the observed precipitation and stream level data from 2007 to 2011.
Application of the Width Function Instantaneous Unit Hydrograph: A Case Study of Cheongmi River
Seo, Yongwon ; Park, Junehyeong ; Rhee, Dong Sop ; Kim, Young-Oh ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1425~1432
DOI : 10.12652/Ksce.2013.33.4.1425
This paper examines the applicability of the Width Function Instantaneous Unit Hydrograph (WFIUH) with a case study of Cheongmi River in South Korea. The parameter values of WFIUH can be physically determined compared to the lumped hydrologic models, which are typically accompanied by parameter estimation procedures with gage records. Assuming uniformly distributed rainfall, the hydrographs obtained with the WFIUH show good agreement with observed data and also the results from HEC-1. A simple investigation of the effect from the rainstorm movement with the WFIUH demonstrates the ability of the proposed model and the need to consider the rainstorm movement effect on the resulting hydrographs for prediction purposes.
Development of Rating Curve for High Water Level in an Urban Stream using Monte Carlo Simulation
Kim, Jong-Suk ; Yoon, Sun-Kwon ; Moon, Young-Il ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1433~1446
DOI : 10.12652/Ksce.2013.33.4.1433
In this study, we proposed a methodology to develop Rating Curves for high water level using rainfall generation by the Monte Carlo Simulation (MCS) technique, optimized rainfall-runoff model, and flood routing model in an urban stream. The developed stage discharge Rating Curve based on observed data was contained flow measurement errors and uncertainties. The standard error (
) for observations was 0.056, and the random uncertainty (
) was analyzed by
on average, and up to
. Moreover, it was found that the Rating Curve extensions by way of logarithmic and Stevens methods were overestimated to compare with the urban basin scale. Finally, we confirmed that the high water level extension by random generation of hydrological data using MCS can be reduced uncertainty of the high water level, and it will consider as a more reliable approach for high water level extension. In the near future, this results can be applied to real-time flood alert system for urban streams through construction of the high water level extension system using MCS procedures.
Prediction of ship wave Crests on Varying Water Depths and Verification by FLOW-3D
Lee, Byeong Wook ; Lee, Changhoon ; Kim, Yong Jae ; Ko, Kwang Oh ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1447~1454
DOI : 10.12652/Ksce.2013.33.4.1447
In this study, we developed the equation of ship wave crests in intermediate as well as deep waters by extending Kelvin`s (1887) theory using the recursive relation for the dispersion relation. The present equation can be applied for varying water depth as well as constant water depth. Using FLOW-3D we conducted numerical experiments to verify analytical prediction. The ship wave crest patterns became asymmetric on a plane slope when the ship propagates alongshore direction. That is, in shallower side, wave crests tend to be parallel to the coastline due to refraction and, in deeper side, wave crests tend to be orthogonal due to reverse refraction.
Experimental Study for Wave Reflection of Partially Perforated Caisson by Slit Shape of Front Wall
Lee, Jong-In ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1455~1462
DOI : 10.12652/Ksce.2013.33.4.1455
This study examines the reflection of a partially perforated wall with single chamber by 2D and 3D hydraulic experiments. The effects of slit shape on the front wall, relative chamber width and wave steepness were discussed. For the normal incident wave condition, the reflections of horizontal slit case were lower than that of the vertical slit with the similar porosity, but the differences are not significant. When the wave steepness is relatively small, the reflection coefficients are large. In the oblique incidence, the normalized wave heights along a perforated wall with similar porosity are almost same for the vertical and horizontal slit walls and therefore the difference by slit shape can be ignored.
Trichloroethylene (TCE) Removal Capacity of Synthesized Calcium Sulfoaluminate Minerals in Hydrated Cement-based Materials
Ha, Min-Gyu ; Ghorpade, Praveen A. ; Kim, Jeong-Joo ; Park, Joo-Yang ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1463~1469
DOI : 10.12652/Ksce.2013.33.4.1463
Portland cement used as binding material in combination of ferrous iron for reductive dechlorination of chlorinated organics is already widely studied topic by several researchers. However there is no clear evidence about the component solely responsible in cement for trichloroethylene (TCE) dechlorination. Many researchers suspect that the ettringite, monosulfate phases associated with hydration of cement are responsible active agents for TCE dechlorination. This study deals with synthesizing different pure crystalline minerals like ettringite and monosulfate phases of cement hydration and check individual phase`s TCE dechlorinating capacity in combination with ferrous iron. The results indicated that the synthesized minerals showed no reduction capacity for TCE. The findings in the present study is significant as it shows that ettringite and monosulfate phases which were suspected minerals by previous researchers for TCE dechlorination are not reactive. Hence it is suspected that some other mineral or mineral form in cement phase could be responsible for TCE degradation.
A Study on Blasting Vibration Control Criteria for Pre-insulated Pipe through the Numerical Analysis
Choi, Bong-Hyuck ; Cho, Jin-Woo ; Kim, Jin-Man ; Yoo, Han-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1471~1478
DOI : 10.12652/Ksce.2013.33.4.1471
In this paper, numerical analysis with varying distance and burial depth was performed to recommend the blasting vibration control standard for pre-insulated pipes. The blasting load model applied in the numerical analysis was verified to the comparison with the results of the field tests. It was determined from the results of the numerical analysis that the effective stress either exceeds or approaches the allowable stress of the inner steel pipe for vibration velocity greater than 4.0cm/sec while stability is obtained for vibration velocity below 4.0cm/sec. Therefore, it was determined that the blasting vibration control criteria for pre-insulated pipes must not exceed 4.0cm/sec.
Low-Cost CAP-type TDR Exploration Techniques for Leak Detection
Kim, Jin Man ; Choi, Bong Hyuck ; Cho, Jin Woo ; Cho, Won Beom ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1479~1487
DOI : 10.12652/Ksce.2013.33.4.1479
The river levee collapse and flood damages are dramatically increased due to the floods which caused by abnormal weather nowadays. The counterplan like TDR(Time Domain Reflectometry) river levee leaking exploration technique is needed to that levee failure causes of levee failure such as levee failure by penetration, piping, inadequate levee materials selection, poor compaction are almost 52% of the failure. This research practiced various comparing experiments of existing TDR(probe and tube types) and developing CAP type TDR to evaluate acrylic small CAP mould and low-cost TDR levee leaking monitoring system which was used probe type TDR. As the result, evaluated TDR system had 20cm critical exploration performance which was a leaking exploration performance, The functional ratio of TDR exploration sensitivity of dry density was sensitive more than 3 times than dry density, and weathered granite soil foundation water contents(w)-dielectric constant(
) corelation formula was suggested to measure functional ratio on developing cap type TDR system.
Instability Analysis of Unsaturated Soil Slope Considering Wet Condition
Kim, Yong Min ; Kim, Jaehong ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1489~1498
DOI : 10.12652/Ksce.2013.33.4.1489
The monolithically coupled finite element analysis for a deformable unsaturated soil slope is performed to investigate the effect of antecedent rainfall which is assumed by initial conditions varying degree of saturation (36, 51, 77%) in finite element analysis. The distributions of matric suction and deformation on slope surface obtained from numerical simulation show the instability of antecedent rainfall-induced unsaturated soil slope. Moreover, the numerical analysis using Drucker-Prager model can be checked if a soil slope has reached failure (trial failure criterion
>0, plastic behavior) or not (trial failure criterion
< 0, elastic behavior). It is found that displacement of slope surface layer increases and the matric suction on soil slope decreases with an increase of initial degree of saturation by antecedent rainfall. Especially, the matric suction of the soil slope in dry condition (S
Variations of Geotechnical Characteristics Following Freeze-Thaw of Terra Nova Bay Rocks, Antarctica
Kim, YoungSeok ; Kim, Kiju ; Jang, Hyun-Shic ; Jang, Bo-An ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1499~1508
DOI : 10.12652/Ksce.2013.33.4.1499
Freeze-thaw tests were performed on gneiss samples collected from Terra Nova Bay, Antarctica in order to examine the engineering properties of rocks with slightly weathered (SW) and moderately weathered (MW). The tests were conducted under temperature ranging from
. A cycle of test consisted of 5 hours of freezing followed by another 5 hours of thawing under full saturation. In this paper, total 200 cycles of freeze-thaw test were performed with measurements of porosity, absorption, ultrasonic velocity, and shore hardness per each 20 cycle and that of uniaxial compressive strength (UCS) per each 50 cycle. The UCS of the SW rocks approximately decreased 0.07 MPa per a single cycle, while that of MW rocks decreased around 0.2 MPa per a single cycle. During the 200 cycles of SW rocks, the absorption increased from 0.23% to 0.39%, the P-wave velocity decreased from 4,054 m/s to 3,227 m/s and S-wave velocity decreased from 2,519 m/s to 2,079 m/s. Similarly, those of MW rocks changed from 0.65% to 1.6%, 3,207 m/s to 2,133 m/s and 2,028 m/s to 1,357 m/s. In conclusion, it was inferred that the properties of SW rocks experienced approximately 200-300 cycles of freeze-thaw process become close to those of MW rocks.
Utilization of a Microphone to Acquire Mobility in Seismic Testing
Joh, Sung-Ho ; Ramli, Bukhari ; Rahman, Norinah Abd ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1509~1521
DOI : 10.12652/Ksce.2013.33.4.1509
Social demand for the stability of structures lead to the development of the technology to accomplish it. The non-destructive seismic technique, which is able to assess structural integrity of infrastructures, belongs to this category. Seismic technique is focused on the measurement of seismic velocity propagating through the material, and has to utilize sensors coupled to material surface, which does not allow the testing to be performed on the fly. In this paper, a general vocal microphone, which works as a non-contact sensor, was adopted to facilitate seismic testing with mobility and efficiency improved. The target of using microphones was oriented toward quality assessment of compacted subgrade, stiffness evaluation and health monitoring of concrete structures. Experimental parametric study and field applications were performed to investigate reliability and efficiency of microphones. Finally, the optimal test configuration of microphones was suggested for resonance tests and surface-wave tests.
The Effect of Base Projecting Walls on the Bearing Capacity and Settlement of Shallow Foundations on Soft Ground
Lim, Jongseok ; Park, Seunghoon ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1523~1528
DOI : 10.12652/Ksce.2013.33.4.1523
It is necessary to develop the simple and efficient technique that ease entry of man and equipment and take the role of foundations of temporary or small structures on the soft ground. This study intends to verify the effects on the increase of bearing capacity of base projecting walls under shallow foundations and to investigate the variance of the bearing capacity of the foundations according to the interval and length of the walls. For this, model soft ground in the chamber equipped with loading apparatus is made and the loading tests on the model foundations with base projecting walls of various intervals and lengths using the apparatus are performed with measuring the loads and settlements. The results show that the base projecting walls under shallow foundations on soft ground are effective on the increase of bearing capacity and the more the number and length of the walls the larger the effects. And, when the ratio of interval to length of the walls is 1, i.e. the shape forming the base of the foundation and the walls is square, the bearing capacity is increased by 25% and the effect is optimum.
Evaluation on Reinforcing Effect of Inclined System Bolting by Model Tests and Numerical Analysis
Lee, Jea-Dug ; Kim, Byoung-Il ; Yoo, Wan-Kyu ; Han, Jin-Tae ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1529~1539
DOI : 10.12652/Ksce.2013.33.4.1529
Recent case studies in Japan have shown that rockbolts are commonly installed at an oblique angle to the excavation direction of the tunnel, instead of at a right angle, due to restriction of the working space. In particular, in the case of expansion in an existing tunnel, the working space can be very small, due to the large protective structures necessary to operate within an existing tunnel. In this case, where both the current use of the existing tunnel, and the reinforcement of the ground around the tunnel are required, the effects of installation angles and patterns of rockbolts are important factors in the design process. Therefore, in this study, a total number of 24 model tests are performed, to investigate the reinforcing effects of system bolting installed obliquely from the excavation direction of the tunnel, by changing the installation angle of bolts, longitudinal distance, and bonded length of bolts. The model test results indicate that the relaxed load ratio decreases, with the increase of both the bonded lengths and the number of the installed bolts, resulting in the decrease of the supported area by one bolt. Two-dimensional numerical analysis, which considered the reinforcement effect of inclined system bolting as the change of engineering properties near the tunnel, demonstrated that the deflection patterns at the tunnel crown in the numerical simulations, show a similar tendency to those measured in the model tests.
Analysis of Response Change of Structure due to Tunnel Excavation Conditions in Sand Ground
Son, Moorak ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1541~1549
DOI : 10.12652/Ksce.2013.33.4.1541
This study investigates the response of structures to tunnelling-induced ground movements in sand ground, varying tunnel excavation condition (tunnel depth and diameter), tunnel construction condition (ground loss), ground condition (loose sand and dense sand). Four-story block-bearing structures have been used because the structueres can easily be characterized of the extent of dmages with crack size and distribution. Numerical parametric studies have been used to investigae of the response of structures to varying tunnelling conditions. Numerical analysis has been conducted using Discrete Element Method (DEM) to have real cracks when the shear and tensile stress exceed the maximum shear and tensile strength. The results of structure responses from various parametric studies have been integrated to consider tunnel excavation condition, tunnel construction condition, and ground condition and provided as a relationship chart. Using the chart, the response of structures to tunnelling can easily be evaluated in practice in sand ground.
Improving Two-way Road Functionality by Using Shoulder
Choi, Keechoo ; Shim, Sangwoo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1551~1558
DOI : 10.12652/Ksce.2013.33.4.1551
The purpose of this study is deriving proper plan which is improving functionality of three-way intersection in two-way road by using shoulder. Alternatives of this study were considered as installation of yield lane and application of TWLTLs (Two-Way Left-Turn Lanes). Case studies to utilize alternatives were limited to national and local roadways which is wider than 11 meters due to be required 3 lanes. Under various traffic conditions such as traffic volume of each direction and left-turn, alternatives were analyzed by simulation. As a results, application of TWLTLs was better than installation of yield lane in terms of improving rate (8.0% vs. 3.7%). Application of TWLTLs is supposed to better alternative, however enough driver education is required to improving safety because it is different with existing driving pattern and/or behaviors. Some limitations and future research agenda have also been discussed by on-site inspections.
The Comparison Between Regional and Urban Truck Movement Characteristics
Hahn, Jin-Seok ; Park, Minchoul ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1559~1569
DOI : 10.12652/Ksce.2013.33.4.1559
this study is to deduct the difference between regional and urban commercial trips by analyzing the characteristics of the regional and urban truck movements. To achieve this, we investigated the relation between the number of truck trips and various truck generation attributes such as truck attributes, origin and destination attributes, and commodity type using ordered logit models, which are separately estimated for regional and urban truck movements using truck diary data of Korea Transport Database (KTDB). According to the estimation results, regional and urban truck movements have different characteristics in truck attributes, origin and destination attributes and commodity type. Especially, the number of regional trucks trips increased as origin and destination are manufactural area and as the total value of products of industrial area in origin and destination increase.
Relative Efficiency of Taxi Services by Data Envelopment Analysis among Cities and Counties in Gyeonggi Province
Kim, Dae Hoon ; Jang, Tae Youn ; Song, Je Ryong ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1571~1580
DOI : 10.12652/Ksce.2013.33.4.1571
This study analyzes the relative efficiences through satisfaction on taxi services of thirty-one cities and counties in Gyeonggi Province. The DEA (Data Envelopment Analysis) is used to measure efficiencies on the privately owned taxies and the corporate taxies respectively. Efficiency in the DEA is measured relative to the highest observed performance rather than against some average. Pyeongtaek, Pocheon, Osan, Yangpyeong, and Gapyeong have the highest efficiency in the private owned taxies. And Pyeongtaek, Pocheon, Osan, and Gapyeong have the highest one in the corporate taxies. These cities and counties have the ability to use less resources for equal efficiency relative to others. Rank-sum test proves that there is no statistical difference in efficiency between the privately owned taxies and the corporation owned taxies.
Calculation of the Peak-hour Ratio at Urban Railway Stations Reflecting Passenger Demand Pattern and Land Use Inventory - A Case of Seoul -
Jang, Sunghoon ; Kim, Hyo-Seung ; Lee, Chungwon ; Kim, Dong-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1581~1589
DOI : 10.12652/Ksce.2013.33.4.1581
The aim of this study is to suggest a methodology for calculating the peak-hour ratio of passengers at urban railway stations by reflecting the characteristics of passenger demand patterns and the land use inventory of stations. To achieve this, urban railway stations in Seoul are divided into three groups by using factor analysis and cluster analysis. For each station group, we calculate five and four variables related to the passenger demand patterns and the land use inventory of stations, respectively, as well as the peak-hour ratios of passengers. Among these nine variables, average daily passengers and the location quotient (LQ) index for business services are selected as the classification criteria for station groups based on statistical tests. Using the two variables, a group allocation process is suggested to estimate the peak-hour ratio of passengers for a newly-constructed station. Evaluation results based on thirteen stations show that the proposed methodology produces lower errors than the currently-used guideline does. The results of this study contribute to establishing efficiently construction and operation plans for newly-constructed stations.
The Potential Driving Behavior Analysis of Novice Driver using a Driving Simulator
Lee, Sang-Ro ; Kim, Joong-Hyo ; Lee, Nam-Yong ; Park, Young-Soo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1591~1601
DOI : 10.12652/Ksce.2013.33.4.1591
In this study, It is conducted for novice drivers about driving behavior and psychological characteristics analysis to reduce traffic accident risk and provide the basic data of education program development. Therefore, this study classified by the category-specific characteristics and hazard prediction through survey of the novice driver and unpredictable behavior and psychological characteristics were studied. The novice and general characteristics and driving behavior with vehicle simulators, comparison and analysis of the novice driver traffic safety education basic research direction based on the statistical results. Prediction the results of this study, the Hazard of the driver, speeding, traffic violation, information providing omission, abrupt change, the number of accidents in all areas novice driver is high compared to the general driver. In addition, Novice driver showed a statistically significant level of Hazard compared to the general driver target novice drivers and the general ability to predict Hazard of violation, abrupt change, and a number of traffic accidents were omitted level of speeding and other information providing level drivers all showed similar results. Vehicle simulator. The experimental results showed that novice drivers compared to drivers poorly overall driving performance. It showed a notable difference in the number of collisions, especially novice drivers compared to drivers in complex road traffic conditions due to a lack of driving experience and learning ability are considered.
A Study on The Introduction of Truck only Lane on Expressway using VISSIM
Kim, Myung-Soo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1603~1610
DOI : 10.12652/Ksce.2013.33.4.1603
The high distribution costs causes the increasing of truck delivery time and cost, which results in reducing industrial competitiveness incre. Therefore, This study conducted research into the introduction of truck only lane for reducting distribution costs. The site of study is Keumho JCT ~ Namgumi IC of Kyeongbu Expressway which has much truck traffic because of industrial complex. Thus, this study deduced travel speed and density in each scenaria(base, bus only lane, truck only lane, two only lane). According to analysis result, if a truck only lane install, the average driving speed is 83.4km/h as a highest and density 22.47veh/km as lowest. it means that if the truck only lane is install, it will be positive influence on the expressway
A Preliminary Study on Developing a Trafficability Index of Vehicles in Wintertime
Chung, Younshik ; Shin, Kangwon ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1611~1617
DOI : 10.12652/Ksce.2013.33.4.1611
Information about trafficability or the condition of road with regard to its being traveled over by vehicles is one of the most critical factors for roadway operation in winter. Specifically, when traveling on snowy or icy surfaces, the traction force varies per vehicle type including tire types, geometric characteristics of roads, and conditions of road surfaces. In general, front-wheel drive or four-wheel drive vehicles have better traction performance on snowy or icy surface than rear-wheel drive vehicles, and the latter type vehicle causes more serious traffic congestion when there is unexpected snowfall. Thus, traffic information regarding trafficability with respect to vehicle types, geometric characteristics of roadway sections, and roadway surface conditions can provide a foundation to make a decision whether to use the associated roadway sections for roadway operators as well as users. Based on the preceding premise, the objective of this study is to present a methodology for developing a trafficability index with respect to vehicle types, geometric characteristics of roadway sections, and roadway surface conditions.
A Study on the Factors Affecting Air Temperature on Roadside : Focusing on Road Conditions and Traffic Characteristics
Lee, Yuhwa ; Yang, Inchul ; Kim, Do-Gyeong ; Lim, Ji Hyun ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1619~1629
DOI : 10.12652/Ksce.2013.33.4.1619
It turned out that there was a direct or an indirect relationship among global warming, urban heat island effects, urban and traffic environments, and public`s health. In particular, unusual climate phenomena such as frequent heavy rainfall and scorching heat in a row that had rarely happened before have a negative effect on quality of life for people living in urban areas. This study focuses on the effects of roadway geometric design and traffic conditions on air temperature of roadside in Seoul Metropolitan Areas, controlling of roadway micro-climate environment. Five roadway segments containing different roadway and traffic conditions in terms of traffic median with trees, street trees, traffic volume and average travel speeds were surveyed. According to statistical results(t-test) from three roadway air temperature regression model estimations, air temperature is found to be different from one another in three periods-morning, afternoon and evening. Regarding roadway geometric design, air temperature of urban roads with vegetated median strips is lower about 1.3~2.2 degrees in celcius. Higher traffic volumes per lane and lower average travel speeds will tend to increase roadside air temperature, and efficient traffic operation policies can protect from increasing roadside air temperature in urban areas.
Estimation of Tire-Pavement Noise for Asphalt Pavement by Mean Profile Depth
Hyun, Tak Jib ; Hong, Seong Jae ; Kim, Hyung Bae ; Lee, Seung Woo ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1631~1638
DOI : 10.12652/Ksce.2013.33.4.1631
Distress data, IRI, etc. are important factors in the evaluation of pavement condition. Recently, the need to consider tire-pavement noise in PMS (pavement management system) is raised. Generally, tire-pavement noise highly depends on the characteristics of pavement texture. Therefore, estimation of texture characteristics may give useful information to predict tire-pavement noise. Measurement of MPD (Mean Profile Depth) by using PLP (Portable Laser Profiler) provide very fast. The texture characteristics by means of MPD can be in a short time. hence, It can be a good alternative to give noise information, if MPD and tire-pavement noise have robust relationship. In this study, MPD and tire-pavement noise were simultaneously collected on the number of asphalt section to evaluate the tire-pavement noise due to the pavement texture characteristics. A set of statistical analysis was performed to propose relationship between tire-pavement noise and MPD for asphalt concrete pavement.
Development of Korean Life Cycle Cost Analysis Model for Road Pavement Asset Management
Han, Daeseok ; Do, Myungsik ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1639~1650
DOI : 10.12652/Ksce.2013.33.4.1639
Road pavement management is an important activity that affects to national economy, movement and safety of people, and also demands huge amount of budget. Therefore, its management strategy must be established under objective information. In addition, decision support system that produces the management strategy needs to consider practical benefits from various aspects. Considering these aspects, this paper aimed to develop a customized Korean life cycle cost analysis model estimating various effects on road users and socio-environmental costs based on pavement condition. The suggested LCCA model focused on Korean national highway, and tried to adopt a national guideline recommended by Korean government for securing credibility of estimation results. In the development processes, some of the suggestions that do not fit well in the situations of pavement management field were added, altered, or partially modified. These attempts to develop customized asset management system would be an important step to break away from passive attitudes relying on ready-made software, but also to improve awareness about the social benefits from the better maintenance strategy.
Stochastic Disaggregation and Aggregation of Localized Uncertainty in Pavement Deterioration Process
Han, Daeseok ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1651~1664
DOI : 10.12652/Ksce.2013.33.4.1651
Precise analysis on deterioration processes of road pavements is not so simple matter due to severe uncertainty originated from a lot of explanatory variables engaged in. For those reasons, most analytical models for pavement deterioration prediction have often preferred to probabilistic approaches than deterministic models. However, the general probabilistic approaches that treat overall characteristics of population or entire sample would not be suitable for providing detail or localized information on their changing process. Considering the aspects, this paper aimed to suggest a stochastic disaggregation method to analyze the localized deterioration speeds and its variances changed by time and condition states. In addition, life expectancies and their uncertainty were estimated by probabilistic algorithm using the disaggregated stochastic process. For an empirical study, pavement inspection data (crack) accumulated from 2003 to 2010 from Korean national highway network was applied. This study can contribute to securing reliability of life cycle cost analysis, which is one of the primary analyses in road asset management, with much advanced deterioration forecasting functions. In addition, it would be meaningful trials as fundamental research for preventive maintenance strategy that demands essential understanding on changing process of the deterioration speed of pavement.
A Study on the Development of an Automated Freeform Fabrication System and Construction Materials
Jeon, Kwang Hyun ; Park, Min-Beom ; Kang, Min-Kyung ; Kim, Jung-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1665~1673
DOI : 10.12652/Ksce.2013.33.4.1665
Recently, the interest and demand on free formed structure providing aesthetic value as well as functionality has been increasing. Formwork has numerous advantages such as high strength, convenience, accuracy and good quality of surface roughness. Nevertheless, it increases construction cost and period to build complex shapes. For these purpose, deposition construction systems such as Contour Crafting and Concrete Printing have been developed with active collaboration between university and industry by applying the rapid prototyping technology to the construction industry in USA and England. Since there has been no related research in Korea, the possibility of spin-off technology and its fusion cannot be expected. In this paper, design elements including mechanical system and control system related to automatic deposition construction system prototype for constructing a free curved structure without mold are described. As for an appropriate material for the system, fiber reinforced mortar was selected by experiments on compressive strength, fluidity, viscosity and setting time. By performing transfer and extrusion experiments, the possibility of the development of deposition construction system was demonstrated. Based on this research results, it is required to keep the automatic deposition construction system improve and extend it into the new application area in construction industry.
A Study on Comparing the CO
Emission Estimating Result for Construction Equipment
Kim, Byung-Soo ; Jang, Won-Suk ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1675~1682
DOI : 10.12652/Ksce.2013.33.4.1675
To resolve the Global Warming problem, it have to reduce
emission. Korea need to do actively more the effort to reduce the emission because
emission per person is top level in the world. It is performing variously. However, we should recognize the
emission attribute to decrease
emission of the construction equipment is important in this aspect. Present, the most popular
emission measuring method is the way using fuel consumption and emission factor. But this method have the problem of reliability because can`t reflect the factor being out of proportion at fuel consumption. This study analyzed the reason of difference and compared to the emission factor method after calculate
emission in direct measurement method.
Machine Vision based Quality Management System for Tele-operated Concrete Surface Grinding Machine
Kim, Jeonghwan ; Phi, Seung Woo ; Seo, Jongwon ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1683~1691
DOI : 10.12652/Ksce.2013.33.4.1683
Concrete surface grinding is frequently used for flatness of concrete surface, concrete pavement rehabilitation, and adhesiveness in pavement construction. The procedure is, however, labor intensive and has a hazardous work condition. Also, the productivity and the quality of concrete surface grinding highly depend on the skills of worker. Thus, the development of remote controlled concrete surface grinding equipment is necessary to prevent the environmental pollution and to protect the workers from hazardous work condition. However, it is difficult to evaluate the grinded surface objectively in a remote controlled system. Also, The machine vision system developed in this study takes the images of grinded surface with the network camera for image processing. Then, by representing the quality test results to the integrated program of the remote control station, the quality control system is constructed. The machine vision algorithm means the image processing algorithm of grinded concrete surface and this paper presents the objective quality control standard of grinded concrete surface through the application of the suggested algorithm.
Development of Approximate Cost Estimate Model for Aqueduct Bridges Restoration - Focusing on Comparison between Regression Analysis and Case-Based Reasoning -
Jeon, Geon Yeong ; Cho, Jae Yong ; Huh, Young ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1693~1705
DOI : 10.12652/Ksce.2013.33.4.1693
To restore old aqueduct in Korea which is a irrigation bridge to supply water in paddy field area, it is needed to estimate approximate costs of restoration because the basic design for estimation of construction costs is often ruled out in current system. In this paper, estimating models of construction costs were developed on the basis of performance data for restoration of RC aqueduct bridges since 2003. The regression analysis (RA) model and case-based reasoning (CBR) model for the estimation of construction costs were developed respectively. Error rate of simple RA model was lower than that of multiple RA model. CBR model using genetic algorithm (GA) has been applied in the estimation of construction costs. In the model three factors like attribute weight, attribute deviation and rank of case similarity were optimized. Especially, error rate of estimated construction costs decreased since limit ranges of the attribute weights were applied. The results showed that error rates between RA model and CBR models were inconsiderable statistically. It is expected that the proposed estimating method of approximate costs of aqueduct restoration will be utilized to support quick decision making in phased rehabilitation project.
Comparative Analysis on Unit Price based on Historical Cost Data Estimating for Large and Small-scale Civil Engineering Works
Hong, Sung Ho ; Shin, Juyeoul ; Kim, Chang Hak ; Lee, Dong Wook ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1707~1718
DOI : 10.12652/Ksce.2013.33.4.1707
Historical cost data estimating system has been introduced since 2004 in the construction industry. Based on contract prices of past projects, this estimating system estimates construction cost according to work types. The Korea Institute of Construction Technology (KICT) announces the historical cost data twice a year annually. The unit price of a small construction project is higher than large construction project due to the increase on production cost per work unit, equipment and labor cost, etc. However, the historical cost data estimating system is applied to project estimation uniformly regardless the construction project`s size. This study compared and analyzed the historical cost data of large and small construction project to indicate the problem of historical cost date estimating system. The study derived that the unit price of a small construction project is 21.8% higher than that of large construction project.
A Prototype BIM Server based viewer for Cloud Computing BIM Services
Yoon, Su-Won ; Kim, Byung-Kon ; Choi, Jong-Moon ; Kwon, Soon-Wook ;
Journal of The Korean Society of Civil Engineers, volume 33, issue 4, 2013, Pages 1719~1730
DOI : 10.12652/Ksce.2013.33.4.1719
Recently BIM technology has been expanded for using in construction project. However its spread has been delayed than the initial expectations, due to the high-cost of BIM infrastructure development, the lack of regulations, the lack of process and so forth. Therefore, this research proposes the cloud computing based BIM service for saving the cost of BIM infrastructure development and providing various BIM Services to meet the domestic process. In order to achieve this, we perform a survey on the cloud computing based BIM service and develope the prototype system as the core technology of proposed service. The developed the prototype system consists of the IFC based BIM server for IaaS (Infrastructure as a Service) and the viewer for SaaS (Software as a Service). This research also conducts the performance test for their applicability and verifies that the results of this research can be used as core components in the cloud computing based BIM service.