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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Civil Engineers
Journal Basic Information
Journal DOI :
Korean Society of Civil Engeneers
Editor in Chief :
Volume & Issues
Volume 23, Issue 6D - Nov 2003
Volume 23, Issue 6C - Nov 2003
Volume 23, Issue 6B - Nov 2003
Volume 23, Issue 6A - Nov 2003
Volume 23, Issue 5D - Sep 2003
Volume 23, Issue 5C - Sep 2003
Volume 23, Issue 5B - Sep 2003
Volume 23, Issue 5A - Sep 2003
Volume 23, Issue 4D - Jul 2003
Volume 23, Issue 4C - Jul 2003
Volume 23, Issue 4B - Jul 2003
Volume 23, Issue 4A - Jul 2003
Volume 23, Issue 3D - May 2003
Volume 23, Issue 3C - May 2003
Volume 23, Issue 3B - May 2003
Volume 23, Issue 3A - May 2003
Volume 23, Issue 2D - Mar 2003
Volume 23, Issue 2C - Mar 2003
Volume 23, Issue 2B - Mar 2003
Volume 23, Issue 2A - Mar 2003
Volume 23, Issue 1D - Jan 2003
Volume 23, Issue 1C - Jan 2003
Volume 23, Issue 1B - Jan 2003
Volume 23, Issue 1A - Jan 2003
Selecting the target year
A Study on Speed Reduction Trends on Bus Lanes
Oh, Heung-Un ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 591~595
It has been believed that high speeds at Bus-lanes are supposed to prevail by simply introducing dedicated lanes and strong enforcement. This is based on the concept that speeds at Bus-lanes are not affected by speeds at adjacent general-purpose (GP) lanes. For these reasons, simple lane markings such as solid lines or double solid lines have been widely used to physically distinguish Bus-lanes from GP lanes. This paper begins with an antithesis of the above popular concept. Therefore, assumptions that speeds at Bus-lanes are affected by speeds at adjacent GP lanes and that high speeds at Bus-lanes are not guaranteed when GP lane are congested, are proposed and investigated. To prove these statements, this paper provides observation and comparison of speeds at Bus and GP lanes. Speed comparisons provided correlation between speeds at Bus and GP lanes even when Bus-lane system is enforced. The results from this paper may lead to more discussion about the old belief that even in a severe congestion condition, vehicle speeds at Bus-lanes may be guaranteed regardless of vehicle speed levels at GP lanes. Therefore, consideration of speed levels at GP lanes may come to a factor for keeping high speeds at Bus-lanes. Additionally, the results encourage facilitating barriers or physical facilities between Bus and GP lanes to increase vehicle speeds at Bus-lane.
An Appropriateness Study on On-Site Retroreflectivities on Freeway
Oh, Heung-Un ; Kim, Min-Seok ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 597~603
Literatures show that curved, ramp diverge, ramp merge and ramp sections on roadways have been under problems of high accident rates at night. Types of accidents at these sections include lateral collisions, overturns, and single skid collisions. Literatures also show that existence of pavement markings contributes to reduce accident rates as much as 21 percent. On Korean freeway lines, there are two painting periods nationwide in a year such as May and October periods. Observed retroreflectivity before resurface of pavement markings are reported ranged 160 to
in dashed pavement markings. 110 to
is above the minimum requirement of
in Korea. Accident statistics for 5 years show that 2 months before the painting periods is characterized by relatively high accident rates and that 2 months after the painting periods is characterized by relatively low accident rates. It may be concluded that correlation between retroreflectivities and accident rates are very clear in terms of 2 months average accident rates before and after the painting periods. These conclusions provide two clues for further discussions. First is that the minimum requirement currently prevailing in Korea may be not good enough for accident rate reductions. The second is that new regulations or guidelines of frequency of pavement marking is necessary to reduce accident rates.
Potential Demand for Telecommuting in Seoul Metropolitan Area
Hong, Gap-Seon ; Lee, Sang-Hyup ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 605~613
Teleworking, which covers all business activities utilizing information and communication technology, is being more widely adopted by developed countries as a means of transportation demand management easing traffic congestion by changing trip patterns. In particular, spreading of telecommuting, which allows one to work at home, is becoming a popular trend in developed countries where telecommuting is used as a way to reduce traffic congestion during morning and evening peak hours by lowering or distributing commute trip demand. This study analyzes the impact of information and communication technology on transportation demand, estimates potential demand for telecommuting in Seoul metropolitan area, and identifies policy directions and strategies for utilizing telecommuting as a means of transportation demand management.
Macroscopic Urban Transportation Network Analysis with Two-Fluid Theory
Lee, Chung-Won ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 615~622
It is difficult to macroscopically characterize urban transportation network with various traffic operation components including signalized intersections and curbside activities. In order to developthe method of characterizing general urban traffic, many researches have been conducted, for example average travel speed, stop time per unit distance, variation of acceleration, fuel consumption etc. Two-fluid Model which was suggested by Herman and Prigogine (1979) is an predominant method based on traffic flow theory. The two-fluid Model provides a macroscopic measure of the quality of traffic service in an urban traffic network which is independent of concentration. The analysis using two-fluid Model needs individual probe vehicle data during analysis period such as total travel time (or distance), stop and running time(or distance) per unit distance or unit time. Therefore it is very difficult to collect basic input data for two-fluid analysis on practical application. This paper presents the application of the two-fluid Model to characterize the network performance of a subnetwork in Seoul ("Seoul Kangnam network") and the snowing impact analysis on the network wide performance. According to results, relative comparison with other cities in literature, the Seoul Kangnam network has lower parameter n(about 0.9) and higher parameter Tm (about 2.17) in normal traffic condition. Therefore, the Seoul Kangnam network turned out to need operational improvement during off-peak period but to keep sustainable network performance during peak period. the snowing impact analysis on the network by tracing the parameter change after snowing. Two-fluid Model was applied to investigate the impact of the snow on the urban street network characteristics. In two different weather situations, snowing and not. According to the statistical test of the structural change, the snowing incurred considerable adverse change of the parameters. With additional before and after data set of the snowing, the parameter recovering trend to normal values was observed. The trend indicates it needs about three days to recover the normal network performance after snowing. There are many cases of two-fluid Model application to urban traffic network in the world, for example, evaluating the impact of new signal operation in many cities of the United States (Jayakrishna et at., 2000). if more researches about two-fluid Model application is conducted, it is obvious that two-fluid Model is useful method to analyze urban traffic network in theoretically.
Quantification of Pavement Damage Reduction due to Vehicle Wandering
Kang, Min-Soo ; Suh, Young-Chan ; Park, Dong-Yeob ; Cho, Yong-Ju ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 623~629
Owing to the strength of being able to judge a specific long-term pavement performance in a short time, interest in the use of accelerated pavement testing is on the increase and the endeavor for the introduction of this testing to the domestic market is very active, too. A lot of factors have to be considered to reproduce accelerated pavement testing close to real situation. Of these factors, wandering (horizontal distribution of vehicle traffic) of load is a major one and it affects a lot required time and expense of accelerated pavement test. Therefore, as basic data for this need, this research verified distribution according to the width of road and the width of vehicle and wandering form of travel by speed, and proportioned quantity damage reduction by using damage model. Summary of the results of analysis in this research is as follows. (1) As a result of verification conducted against 5 types (1,4, 5, 6, 7) among 8 types of domestic vehicles regarding normal distribution on traveling form in a straight zone, it was analyzed that wandering distribution of all these 5 types surveyed at 95% reliability can be regarded as normal distribution. (2) It was analyzed that, as the width of road gets wider and the width of a vehicle gets narrower, wandering form of vehicles becomes larger. (3) Fatigue model and rutting model were used in calculating pass-to-coverage ratios that considered traveling form of vehicles. - In case of fatigue model, pass-to-coverage ratios for type 5 was calculated as 2.15 in 3.5 meter wide road and 1.75 and 1.57 for type 6 and 7, respectively. - In case of rutting model, pass-to-coverage ratios for type 5 was calculated as 1.61 in 3.5 meter wide road and 1.41 and 1.34 for type 6 and 7, respectively.
Knowledge Evaluation on the Construction Industry
Lee, Tai-Sik ; Lee, Dong-Wook ; Jung, Bo-Gun ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 631~642
KM has become an essential need for survival in the over-all industry, not as a simple paradigm but as a critical factor for success. So, the construction industry shows a strong tendency to adopt KM. Km in the construction industry, as an early phase, is focusing on storing knowledge in KMS. After midterm of applying KM, however, the quality of knowledge is more important than the quantity. And most construction companies could store all knowledge except the secrets and sexual issues. The results of evaluation for storing knowledge are very different by evaluator because of the subjective evaluation, in spite of the standard. So, this paper presents a evaluation model for more objective evaluation.
A Cost Analysis Associated with the Improvement of Progress Payment in Implementing EVMS in Korea
Kim, Kyong-Ju ; Kim, Byeong-Soo ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 643~648
Implementation of EVMS has been a hot issue in both private and public construction sector. For the efficiency of public construction projects, if the contract price of a construction project is more than 50 billion won, the Government requires the application of EVMS. According to the requirement, a lot of efforts to adopt EVMS have been performed in public and private sector. However, in spite of its original purpose, there have been disputes about its cost-benefit in applying the EVMS. As a result, this research analyzes cost-benefit associated with the improvement of progress payment method in implementing EVMS in Korea.
The Integrated Model of Value Engineering and Life Cycle Cost for the Construction Projects
Kang, Leen-Seok ; Choi, Hyung-Lae ; Kim, Chang-Hak ; Lee, Cheol-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 649~659
The construction industry has an interest in value engineering (VE) in the design phase rather than the construction phase, because the efficiency of VE application is more effective in the design phase of a construction project. For this reason, the importance for function analysis in VE is being evaluated highly, however, because of the lack of the recognition and difficulties of application method, the function analysis phase is not being applied as a means of getting ideas. This study attempts to improve the problems in the function analysis phase by the use of an integrated process model that can be used for both VE and life cycle cost (LCC). And the study develops a web-based VE/LCC system for the suggested process model and verifies an applicable possibility through the practical examples of a harbor construction project.
Analysis on the Influence of the Reduction of Work Hours for Civil Engineering -Via Analysis of Construction Cost -
Lee, Tai-Sik ; Lee, Dong-Wook ; Yi, Sung-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 661~673
The reduction of work hours is focused on increasing labor productivity and quality of a worker's life. However, the production system in the construction industry is based on the labor of daily workers in contrast to other industries, such as the general manufacturing industry and service industry due to characteristics of the construction industry. Therefore, reducing work hours can lower labor productivity due to the interference of the operational continuity. This study analyzes the influence of the reduction of work hours in civil engineering work. The changes of actual work hours and work patterns of construction laborers were analyzed, and the consequent influence on the construction cost and term of works was derived.
An Visual Alteration Influenced by Components in Hole Shape of Golf Courses
Kim, Jong-Gu ; Oh, Seung-Hwoon ; Kang, Jun-Mo ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 675~681
Golf is including some scenical factors and the existence of complex factors to characterize holes visually might be estimated. And recent landscape architect has realized that golf courses have to be designed by based on a visual aspects. Therefore this study was focused on composing factors which is making up golf course holes and proposed basic data for landscape architectural design of golf course hole. The purpose of this study is the examination of the relations between visual images and configurations in holes. the results may be summarized as following; 1) The classification of the basic configuration in holes and of some parameters characterizing holes visually were proposed. 2) Heights of Teeing Ground and angles of Dogleg were used as main parameters in psychological experiments. 3) The visual alterations of the basic configuration in dogleg hole are examined by computer graphic systems and psychological experiments.
Research of Real-Time Simulator Development for Excavator using GPS
Park, Hyeong-Keun ; Kim, Dong-Moon ; Ha, Hee-Sang ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 683~690
Recently, development of land surveying techniques (GPS RTK) through artificial satellite and mechanization construction technology is consisting festinately. Up-to-date technologies of construction field are developing gradually to base that can grasp all informations of field in field office. Accordingly, need way that can offer analyzing alive information of field visually quickly for real time construction management. Specially, application for GPS and excavator that is used mainly much in site and in reply research is necessarily necessary with analysis about real-time working data about excavation. In this research develop the excavator simulator program that can transmit and trajectory information of bucket end department calculation using GPS surveying data that is received by excavator of imagination through VR(Virtual Reality) techniques and measure data that is measured according to joystick operation. Application result of program could know that is available in real time construction management of field.
Application of Aerial Photo Images through Quality Insurance of Digital Image
Lee, Hyun-Jik ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 691~699
Recently, a variety of geo-spatial informations have been collected using digital aerial photo images over the inside and outside of the country. Although photogrammetric scanner has been used to acquire the digital images of aerial photo in general, some local governments and central government organizations are acquiring digital images using general-pur-pose scanner. Therefore there are lots of problems. The purpose of this study is to contribute to insurance of digital aerial photo image database's quality by evaluating digital images scanned with general-purpose scanner from a view point of applications and limits. Also, we analyzed the problem of DPWS (Digital Photogrammetry Workstation System) which has been used to acquire geo-spatial information in urban areas and tested to improve it. Consequently, we tried to increase application and utilization of digital images.
Application of Radargrammetry to RADARSAT SAR Imagery Using Edge Sharpening Algorithm
Sohn, Hong-Gyoo ; Park, Choung-Hwan ; Pi, Moon-Hee ; Kim, Kyeong-Ok ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 701~709
In order to generate the digital elevation model from SAR (Synthetic Aperture Radar) imagery, two techniques are most frequently used: Interferometry and Radargrammetry. Inteferometric SAR (InSAR) approach, which is based on the phase information of SAR imagery, makes it possible to achieve topography of relatively high precision while greatly depending on the satellite geometry and the condition of the image acquisition. On the other hand, radargrammetric approach, which is based on the amplitude information of SAR imagery, estimates the topography in a more conventional way with relatively lower accuracy than that of InSAR approach. Especially in the vegetated mountainous area, such as Korea, the radargrammetric approach can be more easily applied using currently available C-band satellite SAR imagery. A major goal of this research is to investigate the effective way of generating high quality of digital elevation models through the applications of radargrammetric approach. We developed radargrammetric approach by using two SAR images of 16-bit SGF (SAR Georeferenced Fine Resolution) format, acuqired on April 21th 1998 and May 1st 1998 respectively. To accurately reconstruct the 3-D surface of the study area we applied edge preserving speckle filters, which ensure the quality of the matching result. As a result, the applied edge sharpening filter has shown the best performance in speckle removement among several filters. Finally we successfully created the digital elevation model of the study area with the accuracy of 89.14 m in X direction, 73.97 m in Y direction, and 21.45 m in Z direction, respectively.
3D Modeling of Terrain Objects according to the Point Densities of LiDAR Data
Han, Dong-Yeob ; Cho, Young-Wook ; Kim, Yong-Il ; Yu, Ki-Yun ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 711~717
Recently, the studies on the extraction of 3d coordinate and attribute information of objects using LiDAR data are carried out widely. LiDAR applications in complex terrain and urban are increased due to high positional accuracy, 3D coordinate information, automation of data acquisition and consistent accuracy of data, etc. Generally, the point density of LiDAR data is within
, and it can be increased by merging the strip data. For a variety of building size and shape, it is difficult to decide the suitable point density for building modeling. But it is generally known that building modeling is possible in the order of
. Besides, the modeling of DTM, tree and corridor is tried with only a few quantitative analysis in the aspect of point density. Thus, this study evaluated quantitatively and qualitatively the possibility of extraction and modeling about some terrain objects. As a result, LiDAR data with the density of
or higher is effective for extraction and modeling of various objects.
Mapping the Distribution of Non-Point Source of Pollution Using Satellite Image Dataset and the Analysis of the Pollution Load Estimation Results
Lee, Sang-Ik ; Lee, Chong-Soo ; Choi, Yun-Soo ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 719~726
Land cover map is a typical GIS database which shows the Earth's physical surface differentiated by standardized homogeneous land cover types. The land cover dataset reflects the ecological characteristics of an area more accurately than a land use map which only shows the human use to which land is put at a given time. Satellite images acquired by Landsat TM have primarily been used to produce a land cover map of 7 land cover classes. However, it is now possible to produce a more accurate land cover classification dataset of 23 classes thanks to higher resolution satellite images, such as SPOT-5 and IKONOS. The distribution of non-point sources of pollution has been primarily estimated by administrative statistics or land use maps up until the high resolution land cover map is available. The use of the high resolution land cover map with 23 classes in such activities as estimating non-point sources of pollution includeing water pollution modelling and atmospheric dispersion modelling is expected to increase the level of accuracy and validity to various environmental monitoring works.
Automatic Extraction of Buildings from Airborne Laser Scanning Data
Cho, Woo-Sug ; Jwa, Yoon-Seok ; Lee, Young-Jin ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 727~733
This paper proposed an algorithm for building detection and extraction from airborne laser scanning data. To complement the existing methods, we introduced a concept of pseudo-grid of which size is generated by point density of airborne laser scanning data. Next step is the noise removal followed by the segmentation step that extracts the building candidate points among laser scanning data. In segmentation, a target area is divided into patches with certain size, and each patch is compared with adjacent patches in terms of elevation difference. After then, grouping step is carried out on the pseudo grid. domain. Each pseudo-grid is classified into 4 kinds with respect to heights of laser scanning data contained in each pseudo-grid. The grouping algorithm, which is similar to region growing, developed in the research is performed to assign each building candidate point to each group. At last, the building extraction step is applied on the point domain again. We extract the building boundaries through interest points in two steps. The building boundaries in 3D vector format are then linearized and simplified by line fitting algorithm. The experimental results showed that the proposed method is feasible and promising.
Paper Mapping Automatization using 1/5,000 Digital Map Ver.2.0
Lee, Jae-Kee ; Hwang, Chang-Sup ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 5D, 2003, Pages 735~743
Since National Geographic Information System was started, paper maps have been made with computer aided editing of digital map, instead of etching map-size negative film. Automated paper mapping system's necessity is growing more and more, because digital map has changed into Ver.2.0 which include attributes of feature. Therefore, in this study we try to analyze correlation of the digital map feature code and the 1/5,000 topographic map specifications which is necessary for paper mapping automatization using digital map Ver.2.0, and try to develop print system which will be a fundamental module of automated paper mapping system.