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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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Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 18, Issue 3_6 - Nov 1998
Volume 18, Issue 2_6 - Nov 1998
Volume 18, Issue 1_6 - Nov 1998
Volume 18, Issue 3_5 - Sep 1998
Volume 18, Issue 2_5 - Sep 1998
Volume 18, Issue 1_5 - Sep 1998
Volume 18, Issue 3_4 - Jul 1998
Volume 18, Issue 2_4 - Jul 1998
Volume 18, Issue 1_4 - Jul 1998
Volume 18, Issue 3_3 - May 1998
Volume 18, Issue 2_3 - May 1998
Volume 18, Issue 1_3 - May 1998
Volume 18, Issue 3_2 - Mar 1998
Volume 18, Issue 2_2 - Mar 1998
Volume 18, Issue 1_2 - Mar 1998
Volume 18, Issue 3_1 - Jan 1998
Volume 18, Issue 2_1 - Jan 1998
Volume 18, Issue 1_1 - Jan 1998
Selecting the target year
Evaluation of Riskness and the Maximum Parking Volume on District Road for Prevention of Road Disaster
Choi, Dong-Suk ; Kum, Ki-Jung ; NamGoong, Moon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 769~769
Increase of GNP and improvement of welfare caused by high-speed economic growth make a sudden increase of car-owners. This leads to rise the parking volume in district residential area. Because of increasing parking volume that disturb fire-engines approaching district area, even there some places could not allow fire-engines to enter in. However we don't have any concepts for apprehending how much disturbance outbreaks and how wide inapproachable area is that it requires making basis to secure minimum space for fire-fighting the same problems of other residential areas and detail designing parking space on the whole read system and individual streets in the target area. We can also use this basis as materials for persuading residents who demand more parking space.
LISREL Model for Mode Choice Behavior with Stated Preference Data in Tourism
Kim, Myung-Soo ; Kum, Ki-Jung ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 781~781
The interest of touring activity is getting to increase for developing the economical situation in all most national and region. Accessibility and level of service on road in the tourism region are of important for increasing the attractiveness index. This paper presents a methodology to include such latent factors as explanatory variables. The stated preference survey. SP data, to observe the mode choice behavoir are carried out in the Sor-Ak and Kyer-Yong mountains. The new model of mode choice behavior which is introduced the latant variables, LISREL model, was developed by the SP data using the LISREL package. As a result, the new model of mode choice shows good accuracy more then other model. The result will be use to transportation planning and operation for increaseing the attractive index in the tourism region.
Model of Route Choice Behavior using Covariance Structural Equation
Lee, Byung-Joo ; Sung, Soo-Lyeon ; NamGung, Moon ; Lee, Jin-Woo ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 791~791
This paper considers those qualitative factors such as attitudes and perceptions that affect a driver's decision to take a given route while driving. The stated preference survey which was carried out in this paper was done so for those people in KwangJu who commute to and from work everyday. This study particularly considers the matter of travel time which a driver must contemplate before a drive begins a trip. According to the data obtained from the survey, the characteristics of the given statistics were analyzed and then the LISREL model was used to develop the model that best explains the driver's choice of route, that was revealed through the quantitative and qualitative factors. As the results of the route choice model, the t-value, the variable indicating the usual route taken, shows a high positive value, and the variable for the times a given route was taken per week, shows a negative value. Therefore, when comparing the factors, it was found that the variable indicating the amount of times a driver uses his/her usual route is the more important in the route choice behavior than other. The t-value indicating traffic information in LIBREL is also high. It is therefore apparent that traffic information is an important factor that affects the travel behavior of drivers.
Identification of Variables Influencing Traffic Accidents on Urban Arterials Using Neural Network
Lee, Chan-Rho ; Choi, Jea-Sung ; Ha, Tae-Jun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 803~803
The analysis of traffic accident records was made in this study to identify several variables influencing the occurrences of traffic accidents within a medium size city. Neural network, which draws focus recently in accident research because of its curve fitting capability, has been used as the main tool for analysis, Screening process was made in the early stage to select the variables for a closer look, and subsequently the neural network was applied to the selected variables. The experimental design for applying neural network was mainly a trial and error process, but the results was in a favorable agreement with the real world data. Also, a sensitive analysis was performed to develop a traffic accident prediction model to be used in a medium size city and it is recommended for further research that the research area be extended to better represent the total region.
A Study on the Evaluation of Layer Properties of Flexible Pavement with Respect to Dynamic Effects of Falling Weight Deflectometer. II : Verification through Field Tests
Choi, Jun-Seong ; Lee, Seong-Hoon ; Kim, Soo-Il ; Yoo, Ji-Hyeung ; Ock, Chang-Kweon ; Lee, Kwang-Ho ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 811~811
A pseudo-static backcalculation program is presented in Part I of this paper. Part II describes a verification study undertaken to validate the backcalculaltion procedure. To evaluate the applicability and reliability of DYN-BAL, designed to accomodate the dynamic effect. in-situ and lab tests were also carried out at the test site. A Multi-Depth Deflectometer(MDD) was selected and fabricated as a testing device to measure the interior deflections of the pavement. A special boring device which can install MDD inside of pavement system is also fabricated. The MDD were installed and field plate load tests were performed at the FWD test sites. Resilient modulus tests of field samples were also carried out. From the test results, it was found that DYN-BAL gives the most reliable results when compared with several other computer codes currently in use.
Evaluation of Characteristics of Emulsified Asphalt Mixture by Use of Modified Marshall Method
Park, Tae-Soon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 823~823
This study conducted to evaluate properties of the emulsified asphalt mixture in the laboratory. Two types of emulsified asphalt, slow-setting(SS) and medium setting(MS), were used. The modified Marshall method was adopted as a mix design method. The test results include the relationship between the moisture contents and the coating rates, the density and the moisture contents of compaction, and the effect of the Marshall stability with changing curing times and method, which are known as the important design variables for emulsified asphalt mixture. The analysis of test results showed that 5% of moisture content rendered the best coating rate. However, the coating rate was not necessarily represented the best performance mixture in case of achieving 50% of coating rate and over. The Marshall stability increases with increasing the curing time and it was found that the pre-dry curing method presented the higher value of the Marshall stability.
A Study on the Efficient Implementation and Application of Hough Transform for Digital Photogrammetry
Yun, Kong-Hyun ; Park, Choung-Hwan ; Yeu, Bock-Mo ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 833~833
Many techniques for detecting not only lines and curves but also the contours of arbitrary objects in digital image using the computer have been studied in pattern recognition and robot vision. It is known that Hough transform is resistant to noise and the desired results are acquired even in the damaged image. Because of its applicability to the image with variations such as rotations or scale changes, Hough transform is utilized to detect the outlines of arbitrary objects and restore the damaged image with objects such as straight lines or circles. In this study, based on the percentgage of pixels in whole image it is recognized the executing ability of Hough transform using simulation images with various degrees of noise. Consequently, the results suggested that Hough transform is executible with only
pixels of all figure pixels and that considerable computational savings are possible with negligible performance degradation. In real applications, it was demonstrated that finding the position of fiducial mark using Hough transform and executing inner orientation with calibration data is possible in digital aerial photo.
Accuracy Improvement with the Decision of Depth Interpolation Coefficient in the Underground Utility Surveying
Choi, Seok-Keun ; Park, Kyeong-Sik ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 841~841
As a result of the developement of urban industrialization and increase of city population, underground utilities are more complex, and so often raise unexpected calamity to bring the heavy losses for man and things. This study is to improve accuracy of underground utility surveying by observation depth interpolation with depth interpolation coeffcient. we derived the control-equation from the control depth data which are observed each 10cm from 30cm to 250cm without any medium. The depth interpolation coefficient were decided by using observed control depth data comparing with observed depth data in field. In the result of field test on each case. We prove this study is to be suitable as the accuracy is improved more 2-times than allowed error, 10% at depth, which is enacted by National Geographic Institute.
Improvement Effect of Soft Clay Ground by Quick-Lime Pile
Kim, Chan-Kee ; Jeong, Jin-Seob ; Chang, Yong-Chai ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 853~853
The principal effect of ground improvement by quick-lime pile are influenced by several factors such as water absorption, expansion, exothermic reaction, increase of shear strength of ground and variation of temperature. An experimental study is presented to examine the rate of water content reduction with time and the increase of strength by water content variation in remolded and reconsolidation soft clay improved by Iksan quick-lime pile. The area ratio of quick-lime pile is about 10 percent of the model foundation area. The ground treated by quick-lime pile shows the excellent improvement effect.
Analysis for Effect of Progressive Failure on Geomaterials by Numerical Experiments
Kim, Young-Min ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 863~863
Computation of progressive failure analysis in geomechanics using numerical analysis has received considerable attention in recent years. It is closely related to an advanced soil modeling, because the constitutive equations describing the material behavior play a central role in that analysis. In this paper we have investigated some of the important aspects of calculation of progressive failure analysis using large deformation theory and viscoplastic finite element method. Example of progressive failure behavior of uniaxial compression tests of rock has been analyzed. In showing numerical examples the effects of yield function, dilatancy, boundary condition and shape effect have been discussed.
Geotechnical Properties of Paper Mill Sludges and Their Mixture
Song, Young-Woo ; Park, Jun-Boum ; Jeong, Sang-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 873~873
Due to the rapid industrialization, environmental problems are serious social issues nowadays The most serious issues is the disposal of municipal and industrial wastes. If we can reuse industrial wastes, it will be proficient in economy and environment. In this paper geotechnical properties of paper mill sludges such as Atterberg limits, organic content, specific gravity, standard compaction, hydraulic conductivity, and unconfined compressive strength were tested for reuse of paper mill sludges for waste landfill cover liner. The specimens were consisted of paper mill sludges, bentonite, cement, and fly-ash. The results of the laboratory experiments showed that the hydraulic conductivity of the clay, paper mill sludges, and mixture specimens were respectively
. So the hydraulic conductivity of paper mill sludges, and mixture specimens were lower than that of clay. The type of compaction curve of paper mill sludge was similar to that of clay and least hydraulic conductivity appeared on wet side of OMC. Further studies are required for the effect of freezing and thawing, shrinkage, elimination method of unpleasant smell of paper mill sludge.
The Mechanism of Pullout Resistance of Strong and Simple Compression Anchor
Im, Jong-Chul ; Hong, Seok-Woo ; Lee, Tae-Hyung ; Lee, Oe-Duck ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 883~883
The mechanism of pullout resistance of compression anchor called SSC anchor is analysed. This anchor is developed through the field pullout tests and the laboratory element tests. The Compression Anchor is characterized by decrease of progressive failure, simple site work, economy and durability compared with tension anchor. The characteristics of SSC anchor, compared with tension anchor, mainly are summarized as follows : (1) The plastic displacement of anchor body is very small during pullout of anchor; (2) Total anchor length decreases by the shortening of free length.; (3) The progressive failure is decreased.; (4) The safety factor for pullout resistance increases with time after construction of anchor;
Stress-Strain Behaviour Characteristics of Weathered Residual Granite Soil
Kim, Chan-Kee ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 899~899
This paper is presented of the stress-strain, volumetric strain characteristics of the Pocheon weathered residual granite soil with variation of the initial water content under drained conditions. A series of consolidated drained triaxial compression tests and isotropic compression tests with various initial water content on specimens were performed. All material parameters of Lade's single work hardening model were determined by using the result tests. Most aspects of the soil behaviour measured in the triaxial compression tests were reproduced with good accuracy by the constitutive model. Therefore single work hardening model has been shown to be applicable to weathered residual granite soil.
A Study on the Ultimate Uplift Capacity of Helical Anchors in Various Soil Densities
Shin, Bang-Woong ; Lee, Bong-Jik ; Oh, Se-Wook ; Lee, Jong-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 911~911
At present time, tapered multi-helical anchor is commonly used to carry uplift loads. But the extensive use of helical anchor system has been limited due to the lack of a rational analysis technique to describe anchor behaviour. Therefore, this paper has been focused emphasis on the determination of the uplift capacity of multi-helical anchor(attached two helix) in sand. To examine the behaviour characteristics of helical anchor due to pullout, model tests were conducted with respect to various embedment depths and soil types. The results of model test are compared with the those of other test results. Based on the test results, the ultimate uplift capacity and critical embedment ratio of helical anchor with variation of soil conditions and embedment depths are proposed. Further, the test result are compared to previous theory for application of rational design with variation of embedment ratios and soil types.
The Stress-strain Behaviour Characteristics of the Decomposed Granite Soil in Cheongju District
Shin, Bang-Woong ; Lee, Kwang-Dong ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_6, 1998, Pages 921~921
This paper aimed at predicting the behaviour of characteristics of stress-strain to the decomposed granite soil at Cheongju district. Sample is weathered granite soil, then it is non-homogeneous and anisotropic as well as very various. To analyze geotechnical properties, isotropic compression test and cylinderical triaxial compression tests are performed under drained and undrained condition. At this time it was maintained compaction energy of 95% on the laboratory testing in order to regulate fracture effect by virtue of the compaction. The behaviour of stress-strain relationships were predicted using elasto-plastic constitutive model with single and double yield surface proposed by Lade. On the prediction analysis of the stress-strain behaviour, the slope of early stress state of double work hardening model is bigger than its slope of single model in behaviour of the undrained condition, but deviator stress of single model is bigger than double model in failure.