Go to the main menu
Skip to content
Go to bottom
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
Editor in Chief :
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
Selecting the target year
A study on the Mobility Characteristics Concering the Transportation-Poor
Kim, Chul ; Kum, Ki-Jung ; NamGung, Moon ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 361~361
The development of transit mode has an influence on social environment changing and has positive effects or desperately negative effects like traffic accident. Especially, according to traffic accidents, the occurrence of a permanent handicap is connected with serious problems to social life after the accident. And the increasing of the old result in appearance of the old society in 2003 so need social confrontation for that and need a countermeasure to apply smooth society activity in traffic part. An then in this research, like the old of the handicap to grasp the movement a special quality so as improvement / ensure the basic function of movement like the walking and like the use of public transit mode in center of the basic traffic environments that grasp the problems of use / behavior so we propose the direction that should fix and purpose to cause a concrete research motive in the later.
Drivers' Route Choice Behavior Model of Inter Area Using Fuzzy Reasoning
Lee, Back-Jin ; Chung, Yi-Gyoun ; Sung, Soo-Ryon ; NamGung, Moon ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 369~369
The need for realistic route choice model has become essential in light of the on going research with the ATIS, where drivers are required to incorporate the lots of traffic information into their own perceptions while making route choices on intra-regionals. However, many problems of transportation engineering and planning deal with uncertainties (human perception, decision processes-"good", "bad", "heavy". "wrong"...). The method of fuzzy reasoning is used to correlate the value of network attributes to driver's personal perceptions of route performance and generate a measure of diversion motivation. In this paper firstly, modeling framework for route choice behavior based on concepts from fuzzy reasoning is presented. Secondly, The determination of optimal areas for fuzzy language function and overlapping areas of fuzzy language function are investigated. Finally, seven kinds of defuzzification methods are compared. As the analysis on factors of route choice has been carried out. Its result can be used for construction of the model.
Behavioral Analysis of Dynamic Route Choice with Travel Time Information on Pre-Trip
NamGung, Moon ; Chung, Yi-Gyoun ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 379~379
The pre-trip information providing to at home is useful for the commuters. This paper analyze an effect of the travel time information on pre-trip information using the stated preference data. The data was surveyed in a Kwangju City. The route choice model along to the providing travel information during the time period is then calculated by the individual choice model. The time periods providing the travel information have four different intervals during the peak hour in the morning. As a result, the pre-trip information is of importance factor for the advanced transportation information system(ATIS). However, the drivers' depends on his driving experience more then travel time information when they don't have enough time to office. And, we found that drivers' behavior on without travel time information was difference the choice route with the preference route on networks. Also, when we analyzed by sex and driver's experience the tendency of that was the same.
Vehicle Load Distribution and Estimation of Equivalent Single Axle Load Factor for Expressway Pavement Design
Cho, Yoon-Ho ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 389~389
Three problems for current pavement design procedure were notified; 1) lack of truck weight information for the highway design, 2) different vehicle classifications by a researcher and organization, and 3) ignorance of truck weight characteristics by level of the highway. A way to collect vehicle weight on the Expressway was suggested, and ten places were selected to set overall weight information from the highway. These collected data indicated the distribution of weight by vehicle class, which the weight distribution of three axle group in single unit truck is totally different between the vehicle that has shorter length between axles and the one which does not. Therefore, the classification method adapted by MOCT was selected to identify vehicle class rather than the way traditionally used by both KHC and local municipality. These weight data were also compared with those collected from the national highway. It was shown that the magnitude of load from the national highway were much larger than that of Expressway due to lack of truck enforcement program. Therefore, separative equivalent vehicle loading factor for Expressway was suggested for pavement design.
Relationship between SPOT Strip Image Modelling and GCPs
Lee, Yong-Woong ; Shin, Dae-Sik ; Cho, Bong-Whan ; Yu, Bok-Mo ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 403~403
The consolidated modelling methodology for the continuous SPOT strip images was proposed by using reasonable number of GCPs and with satisfying the required accuracy to cover large scale area. The effects of modelling accuracy by the number of continuous strip scenes, acquisition method of GCPs, and the number of GCPs for the continuous SPOT strip models were tested and analyzed. By using the suggested approaches, as a result, 10 to 20m position accuracy could be achieved for the continuous strip between 3 and 7 SPOT images with only 15 GCPs. The result of this paper can be used not only to reduce the required number of GCPs, time consumption and total cost to acquire the GCPs, but also to avoid mismatch in tieing zone which might arise in generating the digital elevation model with the parameters of the unit modelling.
Acquisition of Large Scale Digital Terrain Data Using Small Format Aerial Photography
Kang, Joon-Mook ; Bae, Yeon-Soung ; Lee, Hyung-Seok ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 413~413
When we acquire the large scale digital terrain data of small area, traditional aerial photogrammetry is not efficient and topographic survey has complex digital procedures of obtained plane. In this paper we intended to present SFAP(small format aerial photography) that acquires more efficiently topographic information of large scale by semi-metric 35mm camera when we perform the plane surveying of small area or plan and design of specially limited route. Ultra Light Plane can fly at low altitude and vertical large scale photo can be obtained by the semi-metric 35mm camera out of gyrosystem. Digital terrain data are extracted by analytical plotters within an expected accuracy. The results of this study are expected to use various topographical survey of small area as well as route survey.
Development of Disaster Management System for Disaster Prevention in the Urban -Centering on Traffic Accidents-
Yoo, Hwan-Hee ; Ahn, Ki-Won ; Lim, Seoung-Ho ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 423~423
All kinds of disasters are occurring for several reasons in modern cities. Those disasters are getting larger and more frequent. It goes without saying that it is urgent to develop Disaster Management System. In this study, Disaster Management System has been developed by constructing database, centering around traffic accidents which take the largest part of all the urban disasters. This will help provide graphs or charts of statistical information about traffic accidents, by analyzing and classifying them by the year, the month, the day, the hour, and by the type, the reason, the sort of the car, with driver's license or no. By dividing the study area to grids of a fixed size and analyzing the traffic accidents within the grid. This is designed to give the mean number of accidents as compared with all lengths of the road and the mean ratio of accidents in a point of intersection within a specific grid.
Accuracy Analysis of Centroid Method and Edge Detection Ellipse Fitting Method for Measurement of Digital Target Center
Han, Seung-Hee ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 433~433
This study compares the accuracy of pointing to circular targets in digital photogrammetry. The methods investigated were the centroid method and the ellipse fitting method. To estimate the accuracy for each coordinate measurement method, image coordinates were measured in a test field simulating a human body model and 3D coordinates were calculated using a bundle adjustment. In the centroid method, brightness and different weighting schemes were analyzed. In the ellipse method, the edge detection based on a modified
algorithm was analyzed. As a result of analyzing displacement for human body model with ellipse fitting method using least square method, we could determine average 3 dimensional positions error with
at 4m distance. The ellipse fitting method was shown to be 24% more accurate than the best centroid method. With that result, it could be used for structure measurement of construction field and for product test of industrial field.
Accuracy Improvement of Supervised Classification of Landsat TM Image using fuzzy Set Theory
Yang, In-Tae ; Kim, Heung-Kyoo ; Shin, Kye-Jong ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 445~445
A hard classification algorithm requires precisely defined set boundaries for a given set. Thus, using classical set theory, an unknown pixel vector may be assigned to one and only one class In this case. Some information of hard classification methodology is completely lost when the pixel is assigned to a single class using hard feature space partitioning. Thus, need a more developed method that brings out accurate classification results than traditional ways to classify. In this purpose, this research item includes the items applicable to classification process of imprecise satellite images, using fuzzy set theory, recently it has spotlighted to many fields like an image processing and engineering part such as picture control of video camera and TV. Therefore, this research will use both fuzzy classification logic with fuzzy set theory and traditional classification way in the same time and training site. Results of this study explored effectively applicable of fuzzy set theory approach for supervised classification process and give to trust through empirical test. Therefore, fuzzy Supervised Classification using fuzzy set theory explores ways toward possibility that elevate classification accuracy for improving some problems from traditional classification way.
A Study on the Borehole Stability due to Grouting Pressure
Lee, Jun-Seok ; Choi, Il-Yoon ; Bang, Chun-Suk ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 457~457
Hydraulic fracturing which has been previously applied to the calculation of in-situ stresses is employed to model the fracturing grouting of the rock masses without discontinuities or rock joints. Based on a bifurcation theory and a tensile strength model tensile as well as shear fracturing of the in-situ rock have been theoretically investigated and their propagation into the intact rock has also been modelled. Numerical examples are finally introduced to verify the proposed models on crack propagation and comparison with experimental data are made wherever possible. Since the current model is mainly concentrated on the fracturing mechanism of the intact rock, it can be expanded into the interactions of the pre-existing discontinuities and the borehole. Grout-reinforcement of the in-situ rock masses, i.e., fracturing grouting, can therefore be fully investigated in the future studies.
Suggestions for Improvement of Domestic Pile Foundation Design Routine -At a Viewpoint of Pile Bearing Capacity-
Choi, Yong-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 467~467
In the domestic "Korean Standard Specifications for Highway Bridges (1996)", it is specified that the capacity of pile foundations could be determined by static formula or pile loading test. But, in domestic pile design, preliminarily presumtive design has been routine because pile capacity was determined by semi-empirical SPT formula only. Thus, optimal pile design has not been performed and excessive design has been practiced. In this study, items related to pile capacity computation which was specified in several specifications ere compared, and design routines to be improved in current domestic pile design were examined and their improvement directions were proposed. The proposed optimal pile design procedures are as follows ; first, pile load test should be performed to the test pile selected in preliminary design stage second, based on the test results for test piles, ultimate pile capacity, settlement and axial load transfer behavior should be confirmed ; third, preliminary presumtive pile design may be revised or changed for optimal pile design. These design procedures were included in "Design Specifications for Highway Bridge", which is being revised in this year.
A Confidence Analysis on the Control Value of Braced Excavation Walls Used In Korea
Jung, Sang-Kug ; Jeon, Je-Sung ; Lee, Song ; Shim, Tae-Sup ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 479~479
In field measuring control, very few studies have been conducted on the control value as the criteria of safety with regard to execution management. The control value developed through experiences and utilized in practice in other foreign countries was introduced into Korea and employed as a method of field measuring control. These performance surveys explore the confidence difference with each characteristic of different control values of braced excavation walls by making use of SAS for PC. The subject of this study includes the technicians in charge of excavation, as well as design, execution, supervision and management in the construction of braced excavation wall. The findings are as follows: The p-values for confidence of control value 1, 2 and 3, experience and position are 0.032 and 0.028, respectively, showing a statistically significant difference
. The p-values for confidence of applied results, ages and control values of 1, 2 and 3 are 0.001 and 0.007, respectively showing a very significant difference
. These findings show that it is necessary that the control value employed in Korea should be revised and improved in order that the control value is more appropriate for the conditions of Korea.
The Relation Between Shear Characteristics and Dilatancy of Decomposed Granite Soils
Lee, Kwang-Chan ; Lee, Jean-Soo ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 489~489
The following conclusions were obtained by carrying out a triaxial compression test, using the undisturbed and decomposed granite sample which gave various degree of weathering. At the CD test of undisturbed samples, the result shows some effects of dilatancy with low cell pressure and generates a lot of shrinkage with high cell pressure. The result of sedimentary clay is very similar with the one of the stress path and appears like the linear approximation as
irrespective of water content, degree of weathering, disturbance and cell pressure. The deformation behavior of undisturbed decomposed granite soils under small confining stress shows hardening to softening whereas disturbed decomposed granite soils do hardening-constant regardless of weathering degree. According to the p-constant test, the increase of cell pressure causes the decrease of stress ratio. but didn't converge to a curve line. This conclusion has resulted from the difference of particle crushing by the cell pressure and the degree of weathering and especially particle crushing have something to do with the coefficient of dilatancy (that is, D). Besides correlations between the dilatancy and the deviatoric stress appeared by p-constant test can be expressed by the equation
and were usually straight.
Frictional Characteristics of Geogrid Reinforced Earth by Pullout Test
Ju, Jae-Woo ; Han, Ho-Nam ; Park, Jong-Beom ; Ochiai, Hidetoshi ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 503~503
The method which makes the soft 9round reinforced by using the geogrid, a kind of geosynthetics has been getting popular and its usefulness also has been increased due to reduction in costs, ease of construction and great exterior view. But the study on the frictional characteristics, which is the most important factor in design, between reinforcement and soil is insufficient. In this study, the test equipment which can carry out direct shear test as well as pullout test was manufactured, the pullout test by using biaxially oriented geogrid and Fortrac geogrid as reinforcement was conducted and Jumunjin standard sand was used as a soil. It is not easy to estimate proper pullout resistance coefficient because pullout resistance distribution tends to be decreased nonlinearly with distance from the front of geogrid. There are Total Area Method(TAM), Effective Area Method(EAM), Maximum Slope Method(MSM) as evaluation methods of pullout resistance. And on the basis of experimental results, pullout friction parameter was obtained by using each method and was compared with friction parameter on unreinforced soil. As a result of the comparison, TAM is 0.43-0.50. EAM is 0.70-0.81, and MSM is 1.59-2.30. In case of utilizing the result of TAM, there is some possibility of over-reinfored design, in case of MSM, there are some problems which happen to the safety of reinforced earth structure due to over-estimation of friction parameter.
The Characteristics of Bearing Capacity of H and Pipe pile by Centrifuge Model Test
Shin, Bang-Woong ; Heo, Yeol ; Oh, Se-Wook ;
Journal of The Korean Society of Civil Engineers, volume 19, issue 3_3, 1999, Pages 515~515
A series of model tests of a vertically loaded single pile was performed to investigate the behavior characteristic of H-pile and pipe pile in the same ground condition. Model tests using a centrifuge apparatus were carried out based on the variation of different gravity acceleration and relative density in sand, and compared the values by static bearing capacity formula with elastic analysis. The experiment was executed for the pile of two types taking different diameters. In case of test series, TSP1, bored H-pile was compared with the behavior of the bearing capacity and load transfer of bored pipe pile in case that the relative density was varied by 40% 60% and 80%. In case of test series, TSP2, driven H-pile was compared with driven pipe Pile under the same condition. Especially, in case of TSP2, the load-division ratio of H-pile was compared with pipe pile by measuring the axial-load distribution due to ground depths. As a result of model test, the bearing capacity of pipe pile was estimated larger than that of H-pile in dense sand(Dr=80%), but appeared that the bearing capacity of H-pile was superior to that of pipe pile in loose sand. Also, the result comparing the axial-load distribution by load transfer method, indicated that the load-division ratio for skin friction force of H-pile is larger than that of pipe pile. The result comparing ultimate bearing capacity predicted by static bearing capacity formula with experimental values, indicated that theoretical values were estimated larger than experimental values in case of bored pile, but smaller in case of driven pile. The shearing stress distribution was reckoned by elastic analysis proposed by Poulos and Davis et at., and load-settlement behavior was compared with experimental result by using the solution of Mindlin equation. Those results were shown satisfactory values for the driven pipe pile.