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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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Korean Society of Civil Engeneers
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Volume & Issues
Volume 19, Issue 3_6 - Nov 1999
Volume 19, Issue 2_6 - Nov 1999
Volume 19, Issue 1_6 - Nov 1999
Volume 19, Issue 3_5 - Sep 1999
Volume 19, Issue 2_5 - Sep 1999
Volume 19, Issue 1_5 - Sep 1999
Volume 19, Issue 3_4 - Jul 1999
Volume 19, Issue 2_4 - Jul 1999
Volume 19, Issue 1_4 - Jul 1999
Volume 19, Issue 3_3 - May 1999
Volume 19, Issue 2_3 - May 1999
Volume 19, Issue 1_3 - May 1999
Volume 19, Issue 3_2 - Mar 1999
Volume 19, Issue 2_2 - Mar 1999
Volume 19, Issue 1_2 - Mar 1999
Volume 19, Issue 3_1 - Jan 1999
Volume 19, Issue 2_1 - Jan 1999
Volume 19, Issue 1_1 - Jan 1999
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A Study on Parking Behavior Characteristics of Drivers and Developing Parking Choice Model in CBD
Kim, Dae-Oung ; Ryu, Yeong-Geun ; Kim, Jae-Han ; Park, Byeung-Muk ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 189~189
In this study driver's parking behavior characteristics in C.B.D were analyzed by quantification theory II, and the variables deeply correlate with parking behavior revealed from the characteristic analysis were used in developing parking choice model typed Logit model. And for developing parking choice model, binary logit model was applied to the case of that choice alternatives were legal or illegal parking and on-road or off-road parking, and multinominal logit model that can predicts three alternatives simultaneously was applied to the case of that choice alternatives were on-road, off-road and illegal parking. parking choice models developed in this study, are expected to generate available data in developing and validating parking policy.
The Study on the Daily Variation of Travel Activity
Lee, Jin-Woo ; Kim, Jae-Guk ; NamGung, Moon ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 203~203
Most models and analysis of urban travel behavior focus on trying to explain variations in travel behavior in terms of the characteristics of those individuals and their environment. Also. the analysis is typically based on a single day record of each individual travel. But, developments in travel behavior analysis are leading to a greater awareness of the need to examine day-to-day variation in travel behavior. Multy-day data is needed to improve our ability to identify the mechanisms behind travel behavior and to derive better empirical relations. This paper analyzed between-individual and within-individual variation of travel behavior and activity using the activity diary survey data collected by 7 consecutives days in Gwangju.
Route Choice Behavior Model Considering Qualitative Factors
NamGung, Moon ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 217~217
This paper develops a method for incorporating latent qualitative factors in discrete choice models. The model framework is composed of a linear structural equation model and a discrete choice model. The linear structural equation model identifies latent variables which are explained by observable objective explanatory variables and the value of subjective factors. The datas are used this study surveyed by commuter drivers of Chonju city as data about drivers' route choice behavior for travel time information. The linear structural equation model estimates to use LISREL program at the first step and then the fixed values of latent variables are used for the estimation of the discrete choice model. The estimation results of route choice behavior model considering the latent variables showed the effectiveness of the proposed method. It also is confirmed that revealed preference(RP) data and stated preference(SP) data have complementary characteristics for model estimation. In conclusion, we found that drivels make route choice behavior considering quantitative factors as well as qualitative factors.
A Study on the Influence of Heavy Vehicles at the Port Road
Jung, Hun-Young ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 225~225
This study firstly focused on analyzing the headway of various types of trailers in Pusan city where the rate of heavy vehicle is high. Then Passenger Car Equivalent (PCE) was calibrated in order for identifying the impact of trailers in the traffic flow at intersections. To fulfill the goal, types of trailers were classified into five categories such as full trailer, head of the semi-trailer, unloaded semi-trailer, semi-trailer loaded with 20ft container semi-trailer loaded with 40ft container. Passenger Car Equivalents were them identified. Results revealed the PCE's were 2.64, 1.51, 2.09, 2.16, 2.23, respectively. Considering the traffic condition in Korea, expansion of study area is essential. Additionally, pavement condition, gradient, and other factors that give influence in estimating PCE must be taken into consideration in the further study.
Analysis of Structural Equation of Travel Choice Behavior Using the LISREL Model
Jung, Byung-Doo ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 235~235
Most travel behavior models predict choice as the utility function of mode characteristics (such as travel time and cost) alone. However, other elements such as comfort, convenience, and reliability are also determinants of choice. Techniques for measuring and structural equation modeling individual perceptions of these elements and incorporating them into mode choice models were developed in recent years. This paper attempts to construct structural models of travel choice behavior using the LISREL model in order to analyze travel attitudes and perceptions of alternatives by obtaining measures of individual perceptions about transportation services and examines preference rankings of alternatives.
The Dynamic Properties of Asphalt Binder with Pyrolyzed Carbon Black from Scrap Tires
Lee, Kwan-Ho ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 245~245
Penetration, softening point, ductility, temperature susceptibility, flash point, burning point, and viscosity have been used to determine the characteristics of asphalt binder. The testing results from traditional testing methods have been showed at specified testing conditions. However, the characteristics of asphalt binder highly depend on the testing temperature, time, and applied loads. In order to overcome these problems, SHRP(Strategic Highway Research Program) has recommended a pretty new testing method and analysis. Lots of researches to enhance the performance of asphalt binder for the design and management of asphalt pavement have been carried out. The main purpose of this research is the use of waste materials in hot mix asphalt, especially the use of pyrolyzed carbon black (CBp) from scrap tires as modified additive and SUPERPAVE testing methods which recommended by SHRP were employed. In order to determine the viscosity and complex shear modulus of asphalt binder with CBp at medium and high temperature, rotational viscometer (RV) test and dynamic shear rheometer (DSR) test, which are recommended by SHRP, were carried out. Also, direct tension test (DTT) was conducted to estimate the strength of modified asphalt at low temperature. The use of CBp as additive increased the viscosity of asphalt binder at
and the complex shear modulus at high and medium temperature, and reduced the shear strain, but the use of CBp at low temperature should be restricted due to the increase of the potential of temperature cracking.
An analysis on Total Resilient Modulus and Instantaneous Resilient Modulus of Asphalt Concrete Mixtures
Lee, Kyong-Ha ; Koo, Ja-Kap ; Rha, Jae-Woong ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 259~259
Resilient modulus is a physical property which represents the characteristics of a pavement system subjected to the cyclic loading According to the in '86 AASHTO pavement design guide, the resilient modulus was adopted as a main input variable of the pavement thickness design. In this study, the resilient modulus test, the Marshall stability test and the indirect tensile strength test were performed on the asphalt concrete specimen. Four types of aggregates collected from different places were used for the comparison. The test results showed that the effects of temperature, aggregate, asphalt content are more significant in the total resilient modulus than in the instantaneous resilient modulus. In the test results evaluated with significant factor of regression variable, the effects of the total resilient modulus were more significant than those of the instantnaeous resilient modulus with all variable except the indirect tensile strength. In the relationship between the resilient modulus and the permanent deformation, the permanent deformation was inversely propotional to the resilient modulus. An equation that describes the relationship between the two factors was proposed.
Numerical Analysis of Layered System Considering the Viscoelasticity of Asphalt-Aggregate Mixtures
Lee, Seong-Lo ; Kim, Richard ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 275~275
In the present study a numerical analysis of a 3-layered viscoelastic system is performed to figure out the characteristic of viscoelastic behavior of asphalt concrete(AC) pavement. The viscoelastic analysis is done by using the Boltzmann superposition principle. The results of the viscoelastic analysis for the three typical pavement sections show that the horizontal strain at the bottom of AC layer and the vertical strain at the top of subgrade are higher than those of the elastic analysis. This means that the viscoelasticity of the AC layer can influence the structural capacity assessment of AC pavement and should be considered in the assessment. Also, the stress invariant at the 1/3 depth of the second layer of the viscoelastic analysis is turned out to be higher than that of the elastic analysis. The resilient modulus of the granular soil layer is usually the function of the stress invariant. Therefore, the viscoelastic analysis is necessary when the nonlinear effect of soil layer is considered. And the computer program for the viscoelastic analysis developed in this study can be used for the structural capacity assessment of asphalt concrete flexible pavement.
Development of GUI and a Computation Software for Land-surveying
Kim, Byung-Guk ; Choi, Jung-Min ; Kwon, Kwang-Seok ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 287~287
Because many of surveying computation softwares were not easy to use or were developed for specific surveying equipments they could hardly improve productivity of surveying operations. To improve productivity of surveying operations, a surveying computation software has been developed, which has adopted GUI (Graphic User Interface). and this software provides with use elemental computations and adjustments with least square method, GUI makes it easy to use surveying computations by clicking graphic entities with specific functions. Using least square method, observation network could be adjusted without regard to numbers or type of observations. Thus, it can be applied more various cases. This software is consisted of elemental objects, set objects and observation objects specialized managers for land-surveying observations.
GSIS Application in Analyzing Residential Area for Housing Site Development
Yeu, Bock-Mo ; Lee, Suk-Kun ; Kim, Eui-Myoung ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 295~295
To prevent disordered urban expansion and promote reasonable landuse, it is necessary to reassign population and land in a effective way through systematic urban policy. In this study, geo-spatial information system is used to efficiently manage national resources in analyzing residential area for housing site development. To incite more systematic and step by step housing site development, the laws and regulations related to housing site are investigated and analyzed. In the case study, the application of GSIS is presented to compare proposed candidates for residential area with current plan for housing site development. Also, residential area is efficiently selected because informations related to housing site are constructed as database.
Correction of Building Occlusion for Generating Large Scale Orthoimages
Yoo, Hwan-Hee ; Song, Young-Sun ; Sung, Jae-Ryeol ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 305~305
Recently, digital maps and large scale digital orthoimages are increasingly important when we construct GeoSpatial Information system. Conventional orthoimages generation systems have some problems, such as generation of precise DEM and occlusion of buildings. Therefore, it often only carried out adjustment for relief displacement of terrain except for buildings. DEM which building was to be precisely modeling must be generated to be precisely adjusted for relief displacement of buildings on generating orthoimages. Accordingly, the DEM of buildings was developed by using digital map which being made by one of the NGIS projects in this study. Occlusions are removed by using the generated DEM. The occlusion on generating large scale orthoimages was able to solve by carrying out the image mosaic.
The Object Space Image Matching for Automation of Relative Orientation
Jeong, Soo ; Park, Choung-Hwan ; Yeu, Bock-Mo ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 313~313
Owing to the introduction of digital photogrammetry, recent photogrammetric studies have been concentrated on the automation of photogrammetric work that has been carried out by skilled professionals in analog and/or analytical photogrammetric field. To automate the whole photogrammetric work, the automation of the orientation processes including interior, relative and absolute orientation should be accomplished first, because those are very important stage in photogrammetric work. This study aims to automate the relative orientation that is the most important stages in orientation process for object reconstruction. For this purpose, we tried to apply the object space matching technique which considers not only the characteristics of image space but also those of model space, to secure the accuracy and efficiency of relative orientation process, instead of conventional image matching techniques which just take account of the characteristics of image space. As the result of this study, we can present a method to automate the relative orientation process that has been semi-automatically operated in most commercial digital photogrammetric workstations currently available.
The Construction of Digital Photogrammetry System Using Windows
Kang, Joon-Mook ; Song, Seung-Ho ; Bae, Sang-Ho ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 325~325
This study is to construct the digital photogrammetry system by the object oriented programming and the event driven method, definition as the handler of event in windows. We could be module some analysis routine to bundle adjustment class for improvement of target image positioning accuracy using the target recognition and target location methods. And, we were able to complete the data process routine by the image auto targeting and user class such as image segmentation, positioning, direct linear transformation, lens calibration, 3D analysis, etc. In the analysis results of positioning accuracy of digital image using the constructed digital photogrammetry system, we know the image segmentation method using the T-3 image segmentation method and ellipse fitting method by the edge detection being acquired better average standard deviation of x=0.2536mm, y=0.2406mm. z=0.7270mm.
Effects of Base Shape and Shear Key on Sliding Behaviour of Cantilever Retaining Wall
Yoo, Nam-Jae ; Lee, Myeung-Woog ; Park, Byung-Soo ; Eum, Jae-Kyung ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 335~335
Conventional laboratory tests with reduced scale models at 1g and centrifuge tests at 20g were performed to investigate the effects of footing base shape and shear key position on the stability of cantilever retaining wall against sliding failure. Experiments were carried out by using six different concrete models of cantilever retaining wall whose shear key being installed at the toe. in the middle, at the heel of footing base, with footing base being flat, inclined with
to the horizontal direction. During model tests, surcharge loaf of the rigid strip footing on the surface of model backfill was applied to induce the failure of model wall due to sliding. Jumunjin standard sand with a relative density of 80% was used as foundation and backfill materials. Applied surcharge load in the form of strip footing, its vertical settlement and the horizontal displacement of model wall were measured during tests. The failure mechanism of model wall was also obtained by observing the formation of sliding failure line with dyed sand. Test results were analyzed with respect to failure mechanism expressing sliding failure line, characteristics of load-vertical settlement of model footing and load-horizontal displacement of model wall. From test results with six different models, bearing capacities of them against sliding failure, caused by surcharge loads applied were compared to each other to figure out which one showed higher resistance. Their values were also analyzed by using the limit equilibrium method, based on the observed failure mechanism during tests, and the existing method of stress analysis.
A Study on the Bearing Capacity of Sandy Ground Reinforced by Mat
Im, Jong-Chul ; Lee, Jae-Yeoul ; Joo, In-Gon ; Lee, Min-Hee ; Kang, Nak-An ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_2, 1999, Pages 349~349
In most of the theories about bearing capacity, it is assumed that the general shear failure occurs in dense sandy ground. However, according to the test results of this study progressive failure occurs in dense sandy ground as well. Therefore, in order to calculate bearing capacity, it is important to use bearing capacity factor in which progressive failure is considered. Based on the results of this study it is known that the effects of bedding depth and friction between soil and mat should be considered to find a bearing capacity of footing on the sandy ground reinforced by mat. In addition, Bearing capacity values calculated by proposed method are compared with results obtained from tests.