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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 24, Issue 6D - Nov 2004
Volume 24, Issue 6C - Nov 2004
Volume 24, Issue 6B - Nov 2004
Volume 24, Issue 6A - Nov 2004
Volume 24, Issue 5D - Sep 2004
Volume 24, Issue 5C - Sep 2004
Volume 24, Issue 5B - Sep 2004
Volume 24, Issue 5A - Sep 2004
Volume 24, Issue 4D - Jul 2004
Volume 24, Issue 4C - Jul 2004
Volume 24, Issue 4B - Jul 2004
Volume 24, Issue 4A - Jul 2004
Volume 24, Issue 3D - May 2004
Volume 24, Issue 3C - May 2004
Volume 24, Issue 3B - May 2004
Volume 24, Issue 3A - May 2004
Volume 24, Issue 2D - Mar 2004
Volume 24, Issue 2C - Mar 2004
Volume 24, Issue 2B - Mar 2004
Volume 24, Issue 2A - Mar 2004
Volume 24, Issue 1D - Jan 2004
Volume 24, Issue 1C - Jan 2004
Volume 24, Issue 1B - Jan 2004
Volume 24, Issue 1A - Jan 2004
Selecting the target year
Departure Time Decision Structure of Commuters Going to Work
Park, Chul-Ku ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 337~344
In this study, The departure time decision structure of commuters going to work under the uncertainty of travel time is analysed by using concept of the safety margin and effective travel time. The main results are as follows ; 1 After setting up the arrival target time based on the work-beginning time of workplace, commuters decide the starting time from their home. 2. For the arrival target time, the tendency taking a serious view of the effective travel time than tardiness probability is shown to them, and most of them decide the departure time by aiming at the expected average value of travel time after setting up tardiness probability as o.5 roughly by experience. 3. For the work-beginning time, thinking so much important of the tardiness probability than the effective travel time, most of them decide departure time as tardiness probability under 2 percentage. 4. At this time, they don't decide departure time as the fixed tardiness probability but by considering the trade-off between the tardiness probability and the effective travel time, and as the result, the tardiness probability for the work-beginning time is decided.
A Simplified Approach to Operational Analysis of Signalized Intersections
Hong, Soon-Jin ; Doh, Tcheol-Woong ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 345~354
For an operational analysis at signalized intersections, it is meaningful to figure out the sensitivity of such variables as in calculating lane utilization factors to adjust traffic volume and through-car equivalents of left and right-turn. The research is to investigate the possibility of simplifying the analysis procedures by using the generalized or combined variables that have less influence. The maximum and minimum values of each variables are compared with each other through the KHCM analysis procedures in terms of the control delay. The synthetical influence of the variables on the sensitivity is evaluated by the scenarios built in prevailing maximum and minimum conditions. The study revealed that the control delay is not significantly sensitive to the selected variables and their synthetical influence as well. However, for the out of prevailing road and traffic condition, the validity of this simplifying procedures would not be proved.
A Study on Optimal Toll Estimate of a Toll Road - Focused on Passenger Cars Using the Geoga Bridge -
Kim, Kyung-Whan ; Jeong, Yeon-Tak ; Ha, Man-Bok ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 355~361
For a private toll road project, deciding optimal toll is an important element of economic analysis for the project and chalengeable work. In this study, the optimal toll of a private toll bridge, Geoga Bridge which connects Geoje Island of Gyeongnam Province and Gaduk Island of Busan was estimated using Stated Preference (SP) data. The SP data were collected by interviewing the passenger car drivers travelling on the National Road 14. They are latent users of the bridge. The ordered probit model was built for the analysis of driver's preference for the bridge; and the optimal toll was estimated using the model and the toll was tested by comparing with the one estimated by the fuzzy quantification technique. When the optimal toll was estimated by stochastic simulation with the ordered probit model for the case that drivers could save one hour by crossing the bridge, the toll for passenger cars was 6,300 won and the toll was close to the one estimated by using the fuzzy quantification technique. Since the optimal toll for passenger cars at one hour saving, the 6,300 won is about 50% of the average pay rate of passenger car drivers, the toll was evaluated not to be high. The technique employed in study may be used for the estimation of the optimal tolls for other kinds of vehicles.
Development of Detector Data Processing Method for Defining Urban Freeway Traffic Conditions
Son, Bong-Soo ; Kim, Bo-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 363~371
Urban freeway has high demand for user and its capacity is much higher than other surface streets. For the effective use and management of urban freeway, it is necessary to collect and process traffic data and produce traffic information. The purpose of this study is to present data processing method which can reflect the traffic characteristics more accurately. Because franc flow characteristics vary with road structure, this study analyzes the traffic data on each component and decides the representative lane(s) that can be used for describing the traffic conditions of roadway section (representative lanes). For deciding the representative lanes, 24 hour's detector data which are collected in Seoul metropolitan urban freeway are used. As the result of the analysis, there is no statistical difference between the spot speeds calculated from the data on representative lanes and those calculated from the data on all lanes. The result of this study can be applied to setting up the location of vehicle detectors and more efficient construction/operation of vehicle detector system.
A Study on the Dynamic Network Loading Model Considering the Bus Routs
Jeong, Heon-Yeong ; Go, Sang-Hyeon ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 373~379
Recently, dynamic traffic assignment-related studies livelily performed for identifying and controlling the real time traffic conditions, and ultimately relieving the transportation problems. However, these studies have been carried out not by the vehicle modes but by the single vehicle mode on the assumption that all the vehicles are composed of the single vehicle mode. So, this study is focused on classifying the vehicle modes of the surface transportation into the passenger car and bus, and also applying the dynamic network loading model to the real network with the vehicle modes for identifying and maintaining the speed characteristics of the transit mode. Based on the results of the dynamic network loading model applied to the imaginary route with the vehicle modes, the dynamic network loading model is applied to the real network at the CBD (central business district) area during the periods: morning peak, afternoon non-peak, and afternoon peak in the city of Busan. The results showed that identifying and controlling the travel time of the bus routes could make the real network stable and smooth during the peak periods.
A Study on Ramp and Flushed Kerb Standards for the Disabled in Korea
Cho, Hye-Jin ; Kim, Kang-Soo ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 381~387
The existing Korean standards for pedestrian ramps and flushed kerbs is 8% grade (1/12) with 3cm heights of kerbs. The purpose of this study is to provide well defined standards for pedestrian ramp and flushed kerb constructions for the disabled based on objective experiments and the opinion of the disabled. We measured effects of propulsions on maximal upper body's muscle fatigue and energy metabolism during wheelchair exercises. Measuring equipments were K4 and EMG(Electromyography). Pedestrian ramps were made for the experiments which allowed three different grades and two different levels of kerb heights. The results showed that as the ramp grade increase, the muscle fatigue increases significantly during wheelchair exercises on the ramps. The maximum values of heart beats increase as the incline of ramps and the heights of the flushed kerbs increase significantly. We also found that most of subjects had difficulty in climbing the ramp with 3cm heights of kerbs. These results indicate that the existing grade standards are not suitable facilities standards in terms of mobility and safety of the wheelchair dependents. Therefore, we suggest the grade standards be 5% with 2cm of kerb height. These new values were decided to be applied in new Korean standards which currently is being amended.
Safety Alternatives to Substandard Concrete Barriers
Kim, Yong-Seok ; Kim, Ho-Kyung ; Noh, Kwan-Sub ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 389~393
Four safety alternatives were developed to improve the existing substandard concrete barriers operated on the rural roads. The first alternative was to remove the concrete barriers and replace them with the barriers satisfying the current specifications. The second was to install the guardrail in front of the concrete barriers. The third was to complement the concrete barriers by putting the beam of the guardrail on the face of the concrete barriers. The forth was to fill the space between the concrete blocks with the concrete. The crash performance of the existing concrete barriers and the four alternatives were studied using computer simulation. As a result, the existing concrete barriers showed the snagging problem, that is, the vehicle was stuck in the space between concrete blocks after crash as expected. The first and the second alternative passed the current specifications completely. The rest two alternatives passed the specifications partly.
A Standardized Testing Procedure and Analysis for Dynamic Modulus of Hot Mix Asphalt by Superposition of Loading and Temperature
Lee, Jong-Seok ; Kim, Hyun-Oh ; Lee, Kwan-Ho ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 395~404
The presented work provided a standardized testing procedure and analysis process for determination of dynamic complex modulus of hot mix asphalt mixtures. And, evaluation of dynamic modulus for 13mm and 19m surface course of hot mix asphalt with granite aggregate and two asphalt binders (AP-3 and AP-5) was carried out. Superpave Level 1 Mix Design with gyrator compactor was adopted to determine the optimum asphalt binder content (OAC) and the measured ranges of OAC were between 5.1% and 5.4%. UTM and nondestructive test method were used. The dynamic modulus and phase angle were determined by testing on UTM, with 5 different testing temperatures (-10, 5, 20, 40, &
) and 5 different loading frequencies (0.05 0.1, 1, 10, 25 Hz). Using the measured dynmic modulus and phase angle, the input parameters of Sigmoidal function equation to represent the master curve were determined and these will be adopted in FEM analysis for asphalt pavements. The shift factor and activation energy for determination of master curve were calculated using the Arrhenius method.
Correlation Analysis of Mechanical Testes of Hot Mix Asphalt
Nam, Young-Kug ; Ko, Chul-Seung ; Jin, Jung-Hoon ; Shon, Won-Pyo ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 405~411
The purpose of study is to analyze the pavement stresses and mutual correlation through new composite examinations(Indirect tensile stress test, Compressive stress test, Marshall test, Shear stress test), which produce pavement damage. Indirect tensile stress test, compressive stress test and shear stress test including Marshall stability test were performed. The grades for surface was used as an aggregate grade and AC60-80, AC80-100 and modified asphalt SBS. used as an asphalt binder. Asphalt contents for surface is 4%-% with 0.5% changes. The tests show that mechanical strengths of modified asphalt is larger than others. The results show that each strength has generally good relations each other. It can be considered that there is a relation between stresses generated in pavement.
A Study on Earned Value Management System by Conclusion Types of a Work Contract
Park, Hong-Tae ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 413~421
Recently our government operates earned value management system (EVMS) for improving work management system of the construction projects over specific scale. Client to preside over a work and contractor to apply and use earned value management system have a hard difficulty because of provisional application and operation of a typical report type and earned value management system by conclusion types of a work contract. The study suggests typical earned value management system by conclusion type of a work contract which is applied to domestic construction. The methodology adopted in the present study will be able to use nat only for the civil works but also buildings in common.
Simulation Model for the Scheduling of Construction Equipment within Traffic Flows
Kim, Kyong-Ju ; Park, Chan-Hyuk ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 423~428
This research implements a simulation model for the evaluation of construction equipment operations within existing traffic flow. A large construction project requires large number of construction equipment. If construction equipment is added to the existing traffic around construction site, This can result in traffic jam around the construction site and the efficiency of the construction equipment gets lower. This research implement a simulation model so as to support scheduling in this case and applies it to "Shiwha Techno-Valley" project. Shiwha Techno-Valley is a gigantic project requiring large number of equipment and resulting in traffic congestion. In particular, project site is located near the Shiwha industrial complex and Daeboo-Do tourist place. As a result, current traffic quantity is considerable. Through the application of the simulation, this research evaluates the feasibility of schedule, schedule alternatives and the usability of simulation in reviewing the efficiency of construction equipment in construction operations.
Web-based Electronic Construction Manual System (ECMS) for Successful Knowledge Management
Kim, Sung-Keun ; Lee, Cheol-Kyu ; Kim, Kyong-Ju ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 429~438
The construction companies reach a consensus on the fact that the critical factors of success are man and knowledge. So, they show a strong tendency to build a knowledge management system (KMS) and make an effort to convert man's knowledge into company's knowledge. For the successful knowledge management, the selective acquisition, the timely update, and the practical use of knowledge are very important. In this research, a construction manual for civil works, which has the information on various construction technologies, know-hows, and tips, is developed and a framework for a web-based electronic construction manual system, which can adopt database, artificial intelligence, and multimedia technologies, is suggested for the better management of construction knowledge.
A Case Study on System Implementation of the Design Management for Fast Track Method in S.O.C Project
Park, Hyung-Keun ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 439~445
Fast tracking a construction project means that activities that are normally done in series through construction delivery system are done in parallel. The construction project is involving various risk for life time of project. Fast track method in project execution gives owners the benefit to shorten construction duration and save construction cost. However, lack of interface management between design and construction leads to risk that the complete date will slip or rework will be needed, Especially in case an investment project like a S.O.C (Social Overhead Capital) project, total duration of the project is directly related to profit of the project. In the beginning of the project, establishing design management system is the key that reduces interference between construction and design. This case study of the project that executed by fast track method shows how to establish plan of design management and implement system of it. The procedure of implementation of design management system through real project is expected to apply to other projects.
The Variation Characteristics of Consciousness Structure for Traditional Townscape in the Historical Center of the SEOUL
Yoon, Hyo-Jin ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 447~454
The purpose of this study is to compare and analyze variation characteristics of consciousness structure for traditional urban houses and traditional townscape of conventional residences for recent 10 years. As the results, The ratio of housing type was slightly varied due to continuing architectural activities for recent 10 years. However, it was presumed that the greater variation was caused due to the variation of the residence households by new transference households. And also, in spite of numerous new transference households, it was founded that considerable number of tenants among survey subjects are comparatively satisfied with the present traditional townscape and don't want to have rapid changes compared to 1992's survey results.
Comparison of Coordinate Transformation Model for Determining the Best Fit Transformation Parameters
Yun, Hong-Sic ; Kim, Dae-Kyung ; Song, Dong-Seob ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 455~461
This study deals with the determination of the best fit transformation parameters between the local geodetic datum and geocentric datum (ITRF2000) in Korea. In this study, we tested several transformation models such as Bursa-Wolf, Molodensky-Badekas, Veis, Affine (Wolfrum) and Krakiwsky-Thomson. We used 107 control points as a common points and applied
test procedure for detecting the outlier among those control points. After applied
test to each model, one point is rejected and 106 common points are finally used. For analyzing the derived parameters, another 80 common points are tested. finally, the best fit parameters are determined from Affine (Wolfrum) model after considering the RMSE, maximum value, minimum values, and 95% confidence interval of residuals.
Determination of Exterior Orientation Parameters Using the Projective Transformation in Close Range Photogrammetry
Kim, Eui-Myoung ; Sohn, Hong-Gyoo ; Kim, Gi-Hong ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 463~467
Orientation procedures are perceived as the central part of photogrammetry and the problem can be formulated with a projective transformation for several reasons. Generally, the Direct Linear Transformation (DLT) or bundle adjustment method is used to determine exterior orientation parameters in close range photogrammetry. However, bundle adjustment method needs some initial values and iterative calculations and DLT method requires more number of control points than bundle adjustment. In close range photograrmmetry the control points can be placed on the two dimensional plane and the exterior orientation parameters are recovered from the relationship between the two dimensional projective transformation and bundle adjustment. In this research, we presented a cooperative strategy between the two dimensional projective transformation and collinearity condition using homogeneous coordinates system which is widely used in computer vision field. It is proved the proposed method is very useful in close range photogrammetric application when compared with the existing bundle adjustment.
Application of VRML for the 3D Image Restitution of the Facility
Park, Kyeong-Sik ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 469~477
The CAD system can be used to display the quantitative information of facility accurately but is insufficient to express the qualitative characteristic such as color or texture. On the contrary, the graphic software has the opposite functional limitation to the CAD system. VRML (Virtual Reality Modeling Language) is the web 3D language to provide the information of the facility through the internet compensating the drawbacks of CAD and graphic software. This study was, therefore, conducted to study effective application of VRML to provide more accurate and realistic information of the facility. In this paper, the facility was first surveyed using close range photogrammetry and modeled in 3D to examine how VRML is generated in each object configuration. The correlation among quality, capacity and operation time of the image used in the texture mapping was also investigated.
An Introduction to Total Least Squares (TLS) through the Comparison with Least Squares (LS) and General Least Squares (GLS)
Lee, Im-Pyeong ; Choi, Yun-Soo ; Kwon, Jay-Hyoun ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 479~485
As the representative existing estimation methods. the Least Squares (LS) and the General Least Squares (GLS) have been used to estimate the unknowns from observations by establishing Gauss Markov model and Gauss Helmert model, respectively. To incorporate more reasonable error models, it is inevitable to establish the Errors-In-Variables (EIV) model and apply the Total Least Squares (TLS). This paper introduces TLS with the theoretical and experimental comparisons with LS and GLS. In conclusion, in case of the EIV model that can include errors in the design matrix, TLS can produce more accurate estimates than the existing methods.
A Study on the Temporal Change in Urban Heat Environments Using Remote Sensing Data
Park, Min-Ho ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 487~496
The temporal change of urban temperature has been analyzed with remote sensing data from the LANDSAT-5. For this, the TM data from October 21, 1985, June 2, 1992, September 1, 1996, May 7,2000 and the
grid elevation data of Seoul have been used. The land surface temperature by the pixel has been calculated using TM band 6 from each date. Likewise the average temperatures by the land cover class, by the district, by the elevation extent, by the slope and by the aspect have been calculated. As the two dates' bands of the TM 6 bands for the four dates are paired to make six combinations, the difference of the digital number for each combination is then calculated and each difference is displayed as an image. As these results are compared, the expansion of urban areas, newly developed areas and land use change are observable. From the varying curve of the average land surface temperature by the elevation extent, the presence of the atmospheric inversion phenomenon and the scope of the inversion layer can be inferred. Also, it is confirmed that the method of calculating the difference between the two TM 6 bands in each pair is effective for verifying the temporal change of urban temperature. For these reasons, it is expected that temperature estimation using remote sensing data shall be effective for the survey of heat damage, environmental temperature monitoring, and urban and environmental planning usage.
The Application of VRML and Web-GIS Technology for Efficient Management of Three Dimensional Facilities
Shin, Seok-Hyo ; Ahn, Ki-Won ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 497~505
3D GIS was developed from 2D expression of 3D topography analysis in 1980, to the 3D topography visualization and analysis system, to the 3D virtual city implementation stage. Recently, VRML has been introduced for Internet GIS to extend 2D information into 3D and diverse trials have been performed to utilize the web's 3D capabilities. Diverse tools have been attempted utilizing 3D space with current techniques. But they are only able to visualize and analyze 3D topography using DEM data in VRML. The aim of this study is the develop the module that is able to construct GIS web server for 3D spatial facilities management in Web to use constructed data for creating, updating and constructing 3D VRML actively, and to carry out 3D spatial analysis and search the attributes.
The Development of Main Function and Algorism for Implementing Mobile GIS
Lim, Seung-Hyeon ; Kim, Hyoung-Jun ; Jeon, Hyeong-Seob ; Cho, Gi-Sung ;
Journal of The Korean Society of Civil Engineers, volume 24, issue 3D, 2004, Pages 507~513
This paper describes algorism and main functions of Mobile GIS that is interested in GIS industry recently and we developed some modules of Mobile GIS that could run on mobile device such as PDA. Programming language used Microsoft's eMbedded Visual C++ 3.0. Also, we used Arcview's Shape file format as GIS graphic data and created a new file format that related graphic data with attribute data by analyzing the Shape file format. And, we implemented the basic function of GIS that could save, display, retrieve the new file format. In addition, for implementing GPS receive function necessary in Mobile GIS we developed a GPS receive module that could deal with GPS data connecting with portable GPS receiver. Data format transmitted from GPS receiver is NMEA 0183. by dealing with the data real-timely, we could represent dynamically the present position of GPS receiver on digital map displayed on PDA screen. We could proffer additionally data concerned in the number of satellite received and geometric arrange situation such as PDOP, Therefore, main functions of Mobile GIS developed through this study is expected to use very useful in Mobile GIS construction for outdoor service such as on-the-spot survey and business trip service.