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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
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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
A Study on the Statistical Analysis of the Parking Phenomenon
Cho, Gyu-Seok ; Oh, Seung-Hwoon ; Kashima, Shigeru ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 121~121
In case of the plate parking survey, a statistical analysis problem has been clarified yet. In this study, the result of the plate parking survey and two kinds of corrected estimators are considered and compared. First, it is shown that the result of the plate parking survey is the worst one among them and that the general corrected estimator is better then them. Secondly, it is found that statistical corrected estimator which is proposed in this paper shows relatively good performance.
Linear Structural Relations Model of Mode Choice Behavior using Stated Preference Data
Lee, Byung-Joo ; Choi, Joon-Kyu ; NamGung, Moon ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 129~129
The study makes up for the data by stated preference survey in order to attend the indirectly assessment of new transport policy. The survey in this study was done so for those people in Chon-Ju city according to surveyed stated preference and the image of mode with Light Rail Transit. As the data obtained from the survey, the LISREL model was used to develop the structural model that the best explains mode choice behavior of transport mode user, which was revealed through the quantitative and qualitative factors. From the results of structural model, the image of mode was found important factor that user was mode choice. However, it is removal with decision making of user because they felt badly the image of mode. Therefore, it is important to improve images by upgrading the service of public transport, so as to carry out transport policy as the activation policy of public transport.
A Study of Measuring the Effectiveness for Road Safety Feature Improvements
Lee, Soo-Beom ; Park, Kui-Young ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 139~139
The number of road traffic accidents has increased as the number of vehicle has increased in Korea. The total road traffic accident costs in 1997 reached at 11 trillion won. The Korean government has recognized the serious situation and tried to reduce the traffic accidents with various countermeasures. Among them, the most popular one is the safety improvement projects at black spots on the road. The resources for the safety improvement projects at black spots are limited. In order to allocate the limited resources efficiently, the priority list should be established based upon economic efficiency. However, the current evaluation criteria contains a couple of deficiencies. One is the estimation of accident reduction rate for each safety treatment. The other is the estimation of overall effect when several safety treatments are applied simultaneously at the same spot. In this study, accident reduction rates for each safety treatment are re-evaluated considering related domestic and foreign data. There are a lot of differences between domestic and foreign data. In this study, new accident reduction rates for each safety treatment are presented in minimizing the gaps between the domestic and foreign ones. Also, a new methodology to estimate the overall effectiveness for the case that several countermeasures are applied to the same location. The new methodology consider the real effect of each countermeasure. The current methodology tends to overestimate the real effect compared to the new methodology. The result of the case study presented in this study shows that the result by the current methodology is 6 times larger than the one produced by the new methodology approximately. It means that the result of the priority list produced by the current methodology could be wrong. In this study, the problems associated with the current evaluation technique for safety countermeasures are identified and the solutions are presented. The methodology presented in this study is a tentative one. In order to enhance the results presented in this study, a vast and comprehensive study should be performed in the near future.
Fatigue Resistance Characteristics of Modified-and-Recycled Asphalt Mixtures
Kim, Kwang-Woo ; Lee, Soon-Jae ; Li, Xiang-Fan ; Lee, Jee-Yong ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 149~149
This research was performed to evaluate the fatigue resistance characteristics of hot-mix recycled asphalt mixtures using indirect tensile fatigue test method. Cold-planned RAP was collected and mix design was performed using 50% RAP content. Penetration grade of 85-100 asphalt was used for mixing recycled mixtures together with polymer modifier, LDPE. The polymer was used to improve tensile property and durability when RAP is recycled as a pavement material. Marshall mix-design, indirect tensile strength and tensile fatigue tests were carried out to evaluate performance of recycled asphalt mixtures. Fatigue test was carried out using 100, 200 and 300 kgf of dynamic loads and fatigue life for each mixture was estimated. Equations for cycles to failure were determined through regression analysis. In fatigue life estimation under repeated stress of
, the recycled mixture without modification, LDM (LDPE dry mix) and LWM (LDPE wet mix) recycled mixtures were 3.7, 5.4 and 12.4 times higher than virgin mixture, respectively. It shows that recycled mixtures have a higher fatigue resistances under dynamic loads and are highly superior to the virgin mixture.
Development of an Automated Construction Cost Estimating System for Computer Integrated Construction(CIC) System
Kim, Jeong-Ryul ; Lee, Yong-Il ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 159~159
The construction industry, often characterized as being labor-intensive, displays its high dependency on labor not only to manual activities during construction, but also to the task of generating and utilizing information during design, estimating, and project execution. The estimating function, which is the main focus of this paper, provides vital information upon which major decisions are made on both parts of the owners and the contractors, and as such requires promptness, accuracy and completeness. Estimating function requires enormous effort for data acquisition, maintenance, and processing which are often handled by manual operations. This paper proposes a systematic and an automated procedure for construction cost estimating under the concept of CIC (Computer Integrated Construction). In an effort to computerize cost estimating functions for CIC, the paper identifies the need for using 3-dimensional CAB information and proposes a CAD layer classification system which has its basis on a unified information classification system for structured information generation. The paper further points out the limitations of procedural computer software approaches and suggests the use of artificial intelligence that best stores and utilizes expert knowledge.
A Statistical Cost Model for Road Construction Project at the Planning Stage
Kim, Sun-Kuk ; Shin, Jin-Su ; Koo, In-Wan ; Kim, Yong-Gu ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 171~171
Precise estimation of project costs at the planning stage is very important because it provides a touchstone of decision-making to various participants such as the owner, designers and engineers, contractors, and etc. Most road construction projects consist of the combination of roads, tunnels and bridges. Therefore, it is not easy to collect sound and standardized cost data and to build statistical cost model with general poly-nominal regression analysis. The objective of this paper is to propose a statistical cost model which estimates a project cost through a decision making process at the initial planning stage. The model consists of regression equations built with all project data and the data selected from similar projects. The effectiveness of the proposed model is evaluated through the application to two sample projects.
A Study on the Usage of Stable Control Points Using GPS Surveying
Kwak, Jae-Ha ; Kang, In-Joon ; Park, Sung-Jae ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 181~181
The coordinates of GPS surveying are 3-dimentional cartesian coordinates which based on the WGS84 ellipsoid. But, Bessel ellipsoid actually used for a datum in Korea. So, users need a coordinate transformation between these two type coordinates. In this study, authors focus to determine their transformation parameters between two different datum using selected stable control points in Kang-Seo area. Authors suggest that users determine the WGS84 coordinates of base station using single point processed results rather than results which correlated with the other IGS points. It is necessary to recalculate local coordinate transformation parameters using selected stable control points.
A Study on the Kinematic Attitude Estimation with GPS Measurement
Park, Woon-Young ; Shin, Sang-Cheul ; Lee, Hung-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 191~191
To determine the attitude parameters it is necessary to get rotation matrix between local level frame and body frame. In this study, the attitude estimation software using direct and least square computation was developed, and the static tests as well as the kinematic tests to vessel were performed so as to assess the accuracy depending on baselines and the performance of GPS multi-antenna system consisting of three non-dedicated GPS sensors. As a result, it could be concluded that the accuracy of attitude estimation was less than 6'
baseline lengths and the attitude accuracy estimated from GPS was inversely proportional to baseline lengths, and it was shown that the usage of much longer baseline was the easiest and most efficient method to determine the attitude of supra-accuracy.
Three Dimensional Reconstruction of Buildings for the Generation of the Large Scale Ortho-images
Yeu, Bock-Mo ; Kim, Eui-Myoung ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 201~201
The conventional digital orthophoto and orthophoto map using aerial photo has not been applicable to the urban administration since it was generated from the small scale aerial photo over mountainous or forest area. This study aims at the generation of digital orthophoto for urban area, implementing with large scale aerial photo by the modeling of buildings. Interest points matching, radial sweep algorithm and surface reconstruction technique was used to determine and an algorithm which is to automatically determine the height of buildings from digital maps and image was developed. We can automatically determine about 94% buildings height in aerial photograph when this algorithm is used.
Conceptual Design of CAII(Computer Aided Image Interpretation) System for High Resolution Satellite Image
Lee, Byoung-Kil ; Kim, Yong-Il ; Eo, Yang-Dam ; Park, Min-Ho ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 211~211
The applications of remote sensing had limited to small scale mapping due to restriction of computing environments and sensor capabilities. However, remote sensing faces new era with the introduction of high resolution satellite images that are enabled by the improvements of computer and electronic technologies. High resolution satellite images have nearly the same resolving power as aerial photograph and can be used for updating a large scale map up to l/5,000 scale. For doing this, remote sensing tends to adopt many related technologies such as aerial photogrammetry, aerial photo interpretation, artificial intelligente, computer vision and so forth. Therefore, it is needed to research on synergically integrated system of the technologies listed above. In this research, future trend of remote sensing technology is predicted and conceptual ideas of CAII(computer aided image interpretation) system are proposed.
The Precision Measurement of Stone's Surface Roughness by Digital Close-Range Photogrammetry
Ahn, Ki-Won ; Cho, Byung-Jin ; Lee, Hyo-Sung ; Shin, Sok-Hyo ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 219~219
This study aims to presents digital close-range photogrammetric technique for precision measurements of stone surface roughness. Especially, to obtain best fitting reference surface of roughness measurements, the surface used reference plane and surface equation were determined by least square method. This paper compares the results for surface roughness of sample areas of rough and manufactured surface. in addition, The RMS of the normal distance between the sample points and the ideal plane or surface did not exceed 0.1 mm.
A Study on the Development of Accuracy using a cheap GPS Receiver in Car Navigation System
Yeu, Bock-Mo ; Joo, Hyun-Seung ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 227~227
Car Navigation System provides the driver with the information about the road and leads more convenient way when driving. Because CNS uses only the data from the single GPS, decision of location or direction may contain a lot of errors in it. These errors may disturb information of the location of roads or may not distinguish the neighbor road. And it has few advantage for single GPS when in use in the field of survey, because it is made only with simple purpose - the decision of the location. The aim of this study is to reduce the errors from single GPS surveying, and to provide the standard of basis with reliable Differential GPS data. When DGPS is connected to CNS, it is possible to be transmitted the accurate data from the GPS satellites with differential GPS signal. High accuracy of DGPS data can be used as the standard of surveying to verify the quality of the digital map, as well as publish the digital map. And, because the car moves in high speed, CNS can measure the area of wide field immediately and easily, for example wide constructing site. So, in this study, the use of DGPS instead of GPS in CNS makes possible to acquisite accurate location data, and to be used in rapid surveying for the large area with and high precision and accuracy in cheap price. With the results of these experiments, it is proved that the accuracy of DGPS has enhanced up to 39.5% relative to the surveying using GPS.
A Study on the Updating of Digital Maps based on the Completion Drawing
Yang, In-Tae ; Kim, Dong-Moon ; Cho, Heung-Muk ; Im, Hon-Ryang ; Chun, Ki-Sun ;
Journal of The Korean Society of Civil Engineers, volume 20, issue 2D, 2000, Pages 241~241
The scope of this study is to provide the updating methods for digital maps based on completion drawing. The digital maps is first subject of National GIS Building Project. To improve the value-added of last user, these digital maps have to updated to up-to-date data. And then updating policies of digital maps have to establish. In this study, it was tired to experimentally judge the ease and cost of the completion drawing on the mapping polices of other advanced countries, the update methods of paper maps. And we conducted an experiment on the updating of digital maps based on the completion drawing. Finally, we suggest the strategies for updating methods and other renewing method of digital maps.