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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of The Korean Society of Civil Engineers
Journal Basic Information
Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 20, Issue 6D - Nov 2000
Volume 20, Issue 5D - Sep 2000
Volume 20, Issue 4D - Jul 2000
Volume 20, Issue 4C - Jul 2000
Volume 20, Issue 3D - May 2000
Volume 20, Issue 3C - May 2000
Volume 20, Issue 2D - Mar 2000
Volume 20, Issue 2C - Mar 2000
Selecting the target year
Time-Of-Day Modeling for Peak Traffic Volume Estimation and Its Application (to Road Feasibility Analysis)
Choi, Kee-Choo ; Shim, So-Jung ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 249~249
The four-step travel forecasting model, still widely used in practice in spite of some limitations, provides either a daily or a peak-hour traffic volumes. They, however, can not be an exactly representative temporal volumes since the effect of congestion has not been fully considered. That is, to address the congestion effect in the modeling estimation of unit temporal volume, the pattern of peak-hour franc characteristics has to be employed. The purpose of this paper is to integrate the idea of time-of-day modeling (TODM) paradigm into the existing four-step travel demand forecasting, and apply TODM to "legendary" U-TOWN hypothetical city to test the sensitivity of TODM with de facto "conventional" method. Some procedures of TODM integration and vision of TOD modeling applicability have been included with discussion and future research agenda.
The Development of Parking Management System (PMS) for Efficiency Management and Enforcement of RPPP
Lee, Keun-Hee ; Kum, Ki-Jung ; Lee, Hong-Bum ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 263~263
The most parking are mainly caused by unequality between demand and supply for parking places. Though it is important that we make the quantity of parking zone in metropolis which becomes rapidly motorized increase, the systematic parking management at limited parking places in urban is more meaningful. The purpose of parking management system in this study is to improve the parking problems resulting from the Residential Parking Permit Program (RPPP) carrying out in Seoul and to develop the methods of systematic parking information for of parking places. Especially, parking information system which can check the current situation of each parking place and consider the visiting car by time-searching is developed with emphasizing on the actual site property through the GIS at self-governing body. It also provides a reform measure on existing problems. Consequently the Parking Management System improve the problems of current and leads higher use efficiency. Futhermore it is expected that the Parking Management System bring the improvement of transportation information through application of ITS such as ATIS (Advanced Transportation Information System) considered into central function of transportation area in the Parking Permit Zone Project executed in Seoul.
A Study on the Driver Visual Behavior on Highway Tunnel Section
Kim, Ju-Hyun ; Kim, Ho-Young ; Kum, Ki-Jung ; Kim, Myong-Soo ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 273~273
It is very important to analyse drivers' visual behavior because visual information accounts for more than 90 percent of information for driving. There is a research that adjustment factor for a tunnel is 0.95 and for a continuous tunnel is 0.90. The reason is that a vehicle slowed down for visual trouble in the tunnel section of highway. This problem usually happens but there has never been studied of human factor which is operated as causes. Therefore the importance of researches on stable driving, smooth travel and coping with travel safety is increasing day by day. In this regard, this study has an eye to visual aspect among things which influence drives' activity. The object of this study is the Jungbu 4 tunnel on Jungbu highway and the main purpose is to analyse drivers' range and change of visual behavior. we expect to devise a comfortable and safe means in places such as a tunnel which impose much psychological burdens on drivers.
Development of Seasonal Temperature Dependent Elastic Modulus Model for Asphalt Concrete Layer in Korea
Yang, Hee-Jeong ; Choi, Jun-Seong ; Kim, Soo-Il ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 283~283
In backcalculated layer moduli, the effect of the seasonal temperature variations are taken into account. To evaluate pavement perfomance, the moduli of asphalt concrete layer predicted by field tests must be converted into corrected moduli with respect to reference temperature. To account for the effect of the seasonal temperature variations, effective temperatures which represent temperature gradients in AC layer are determined and are classified into three seasonal data groups which are in the range of less than
and more than
with respect to the daily mean air temperature. Seasonal temperature-dependent elastic modulus models for AC layer are developed through regression analysis using three seasonal data groups. To simplify seasonal temperature-dependent elastic modulus models, effective temperature depths corresponding to effective temperatures on AC layer are proposed with respect to the range of daily mean air temperature in this study. Simplified seasonal temperature-dependent elastic modulus models are also developed through regression analysis using temperature data at effective temperature depths. Seasonal temperature correction procedures are proposed using seasonal temperature dependent elastic modulus models and simplified seasonal temperature dependent elastic modulus models respectively. Through the comparison study of the seasonal FWD test, it is shown that seasonal temperature dependent elastic modulus models developed and temperature correction procedures proposed in this study are valid.
Highway Design Level of Service Based on Traffic Safety
Chang, Jae-Nam ; Oh, Cheol ; Chang, Myung-Soon ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 293~293
This study evaluated the relationship between accident rates and V/C ratio for freeway basic section to design freeway based on safety. The analysis is performed on Joongbu and Singal-Ansan freeways having four lanes with a design speed of 100 km/h. Traffic volume and accident data between 1992 and 1997 were analyzed. The relationship between accidents and V/C ratio revealed the U shaped model. The accident rates were lowest at V/C=0.80 and were tend to increase when V/C is either low or high. The study results could be applied to determine the number of lanes needed using the V/C ratio of 0.80 in designing freeway based on safety
Constitutive Models for Resilient Modulus of Subgrade Soils in Korea
Kweon, Gi-Chul ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 301~301
The MR values of subgrade soils are affected by several factors. Extensive research has been performed to study the influence of various factors affecting resilient modulus. Keeping all other factors constant, the MR value is stress dependent. AASHTO T-294-92l has adopted the deviatoric stress model for subgrade soil, which consider deviatoric stress only. However, the moduli of subgrade soils in Korea, which are most sandy soils, were affected by not only deviatoric stress but also by confining pressure. Therefore, a model that considered both deviatoric stress and confining pressure is needed to evaluate the resilient modulus of subgrade soils in Korea. In this paper, seven subgrade soils were collected for testing from the actual pavement projects and cyclic MR tests were performed. Comparison of measured resilient modulus is made with predictions by various constitutive models.
Environmental Load Evaluation through the Life Cycle of Hi`ghway
Park, Kwang-Ho ; Hwang, Yong-Woo ; Seo, Seong-Won ; Park, Joong-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 311~311
In this study, environmental loading emitted from the life cycle of highway, which is one of the major infra-structure and plays a great role in nation land, is estimated. The life cycle of highway was divided into four stages such as manufacturing of construction materials, construction, maintenance/repair and demolition/recycling stage. Energy consumption in each life cycle stage was quantified and environmental load was also estimated by applying environmental emissions factor per each energy source. As the results, the most of energy was consumed in manufacturing stage of construction materials with consumption of 1525.76 TOE per functional unit (1 km and 4lane of highway). Energy consumption in maintenance and repair stage was also rotatively high among the life cycle stages and the next was construction and demolition stage. Through the whole life cycle of highway (20 years), 2676.77 TOE of energy per functional unit was consumed and this is applicable to
emissions of 62.10 ton, 17.12 ton and 2438.51 T-C, respectively.
The Track Maintenance Work Effect of Multiple Tie Tamper
Koo, Bong-Kuen ; Suh, Sa-Bum ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 323~323
For correction of track irregularity caused by sinking and deformation of ballast due to repetitious load train, main activities of track maintenance is Multiple Tie Tamper (MTT). So first of all, the effect of MTT work should be represented quantitatively in order to optimize MTT works. Therefore this study reviewed characteristic of realignment of track by MTT with mathematical model. Statistic analysis is made regarding actual MTT work to effect by measuring status or track irregularity before and after MTT work. Alter study we round it difficult for MTT work to realign large wavelength's track irregularity as far as equipment's structure is concerned. Generally actual work has realignment effect but we noticed that there are some sections against work purpose. Lining has relatively less realignment effect and we found that technical improvement should be required.
On the Generation and Positional Accuracy Evaluation of SPOT GCPs
Yeu, Bock-Mo ; Lee, Yong-Woong ; Choi, Sun-Yong ; Cho, Bong-Whan ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 331~331
SPOT digital imagery has been utilized in diverse applications such as generation of digital map, 3 dimensional image generation and DEM (Digital Elevation Model) etc. For appropriate utilization of the SPOT images, SPOT users have to conduct modeling process using GVPs (Ground Control Points) to establish the relationship between the image coordinates and ground coordinates. GSD (Ground Sampling Distance) of SPOT is about 10 m may cause the difficulties of selection of GCPs and the accuracy of GCPs has great effects on the sequential applications. Therefore, before using the SPOT modeling results, the positional accuracy of GCPs must be tested and evaluated. Field measurement can be introduced as a measure for UP accuracy, however, this approach generally accompany with a economic burden and time consuming workload. In this study, we proposed an approach for the generation of GCPs with national SCPs and an accuracy evaluation method for SPOT derived GCPs, without using field surveying data. Comparative evaluation was accomplished on the test area of SPOT GRS K305J277 by comparing the GCPs with GPS field measurement data set.
The Analysis of Earthquake Data and the Gps Baseline Change for Curst Movement Detection
Kang, Joon-Mook ; Lee, Young-Wook ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 3D, 2000, Pages 341~341
The lithosphere, it calls crust has, several tens thicknesse. And the lithosphere is a standard of distinguishing plates. The plate in a lithosphere divide almost 10 plates (Eurasia plate, Pacific plate, North American plate, etc). Each plate is moving with several cm/year. This moving is being direct reason of earthquake so, it brings serious damage. In this study for diastrophism perception, we analysed earthquake data during 1978-1998 using Geomedia according to year, month. In 1996 year the earthquake was occurred most frequently, also in HwangHae province and Peung-An province. As a result of calculating crustal deformation parameters from the base-line changement according to GPS measurement, in case of international network, the decreasement of baseline leads to decreasement of maximum shear strength rate and increasement of dilation. In case of national network, because baseline changement was small, the crustal deformation parameters's change was a small. So, for the perception of diastrophism, it'll need continous study