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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 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
Modelling for Queue Estimation on the Approach of Signalized Intersections
Kim, Dae-Oung ; Woo, Yong-Han ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 159~159
The analysis for queueing on the intersection was executed on the assumption that arriving rate is uniform up to now. This method was generally used because of easy calculation and comprehension. But it had possibility to make errors because the arriving pattern of vehicles was practically transient state. Therefore, the purpose of this study is to establish queueing model that is suitable for traffic conditions by finding out the arriving characteristics according to the time change on the basis of the arriving pattern. This study classified traffic conditions into 3 cases with relationship between arriving vehicles and capacity for signal phases and analyzed the relationship between queueing position and headway. It was found out that negative exponential model is suitable for the relationship with headway. Queue model was established as stopping pattern of vehicles according to cycle time and exponential model (
) was found to be suitable. At last, this study compared the result of equation which was newly acquired and the result which was acquired by average arrival rate. This result could be used for planning of the optimal cycle and green time.
Assessment of Applicability of Dry-Processed CRM Asphalt Mixture for Surface Course Materials
Kim, Kwang-Woo ; Choi, Young-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 173~173
In this study, CRM (Crumb Rubber Modifier) asphalt concretes were prepared using two types of CRM which were produced by a domestic company and by a Canadian company, respectively. The marshall mix design, indirect tensile strength test expedited moisture conditioning. freezing-and-thawing conditioning and stripping evaluation were performed to evaluate applicability of CRM in surface course of asphalt pavement in Korea. The CRM asphalt concrete needed somewhat higher asphalt content. Although stability and density were somewhat lower and flow was higher than conventional asphalt concrete, most characteristics were acceptable for domestic criteria. Strength characteristics including indirect tensile strength of CRM asphalt concrete were generally lower than conventional ones. However. it showed that the resistance to freezing and-thawing and stripping was somewhat better than conventional mixture. It was concluded that use of CRM in asphalt pavement had some positive effects.
The Practicability Evaluation of Digital Close-Range Photogrammetric System Using a High Resolution Still-Video Camera
Lee, Jin-Duk ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 183~183
This paper addresses the topic of the construction of the digital close-range photogrammetric system, in which still-video imagery is incorporated with the image mensuration algorithm and the self-calibrating fondle adjustment technique, and the practicability of this system for industrial applications. The self-calibration approach derived the parameters which are related to the interior orientation and the lens distortion of the Kodak DCS200 still-video camera and demonstrated the hi호 accuracy potential which exceeds 1/100,000 in the measurement of a
test wall. In addition, the entire exterior surface of the car was measured by employing respectively a still-video camera DCS200 and a film-based camera Rollei 6006. The application of this vision metrology system employing the still-video imagery demonstrated triangulation accuracies of 1/30,000 to 1/60,000, which is about four times as high as those resulted from the Rollei 6006. It was ascertained that the vision metrology system is a 3-D measurement tool which is well suited to dimensional inspection in close-range engineering and industrial applications.
Development of Real-Time 3-D Positioning Systems Using Cameras and Theodolites
Yoo, Hwan-Hee ; Cho, Hae-Yong ; Song, Young-Sun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 195~195
Close range photogrammetry has been used for a variety of application. The main purpose for utilizing close range photogrammetry is to derive three dimensional coordinates of objects. This paper describes a system that was developed to get three dimensional coordinates of objects using cameras and theodolites without ground control points. CCD cameras and non-metric cameras were integrated theodolites by using the joint device that was developed in this study. After calculating offset between cameras and theodolites in a laboratory, real-time 3-D information of objects is derived by space intersection on the spot. A system that we developed is expected to be utilized to obtain three dimensional data of objects faster and more accurately as a real-time mapping system.
Elasto-Plastic Analysis of a Grout-Reinforced Tunnel using a Macro Yield Function Method
Lee, Jun-Seok ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 207~207
An elasto-plastic analysis model for grout-reinforced tunnel is proposed by adopting a macro yield function. For this, in-situ soil and grout are assumed to behave elasto-plastically and a separate yield function as well as residual stresses are used to derive the macro yield function. Comparison has been made between the proposed method and 3-D discrete analysis to validate the efficiency of the proposed model. The proposed model is also compared with the sub-iteration method employed in Ref. . As a result, the proposed macro yield function model, while retaining its simplicity, shows the consistent results compared with the sub-iteration method as well as 3-D model using DIANA. Future study will be focused on the injection effect of the grout through rock joints and the hydraulic fracturing due to high injection pressure.
Influence of Loading Combination on the Internal Stability of Reinforced Earth Bridge Abutments
Lee, Woo-Jin ; Lim, Hyung-Duk ; Lee, Won-Je ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 217~217
The effect of vertical loads on bridge abutments on the internal stability of reinforced earth wall was analyzed in this study. By comparing the F. E. analysis results with the designs based on a coherent gravity hypothesis. an appropriate design method for internal stability evaluation with respect to abutment load was suggested. It was shown that, depending on the method to estimate the vertical stresses on the reinforcing strips due to abutment load, current design method give the significantly different distribution of calculated factors of safety. It was also found that the design method considering the abutment load separately from other design loads gives the similar results with the finite element analysis. As the magnitude of abutment load increases, the difference of safety factors evaluated by the suggested design method and the finite element analysis increases, and the method presented in this paper appears to give a conservative evaluation for the internal stability of reinforced earth bridge abutments.
The Breakable Properties Related to Wheathering Degree of Decomposed Granite Soils
Park, Byong-Kee ; Lee, Jean-Soo ; Lee, Kwang-Chan ; Moon, Yong ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 227~227
The analysis of chemical components as well as the physical and mechanical properties was carried out for the compacted and undisturbed decomposed granite soils. Those soils were sampled from 16 different work sites all over the country. CWI and Li could be related to grasp the chemical properties of the soils whereas specific surface area considering external forces such as shear, compression and compaction dependent on weathering degree was employed to investigate breakable properties. This study shows that the values of CWI were ranged from
. In particular, those values of CWI greater than or equal to 20.0 were obtained from 12 sites and proved completely decomposed soils. Futhermore some relations among CWI, Li,
were supposed to have a good correspondence. These relations of indices obtained from above properties were possibly utilized to find out weathering degree. The magnitude of particle breakage was increased during compaction, shear and compression. The breakage of particle due to compaction was noticeable at OMC and dependent on weathering degree. Finally, correlations among various test results related to weathering degree and geotechnical properties accompanying breakage of particles were examined.
Study on Load Transfer Test for the Open-ended Steel Pipe Pile
Choi, Yong-Kyu ; Chung, Sung-Gi ; Kwon, Oh-Kyun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 241~241
While case studies on load transfer test for driven open-ended pipe pile have been performed in the foreign countries, they have not be done in domestic area. In load transfer test done in the previous studies, there was the case that the electric wires soldering to strain gage were term off by the tension wave of test pile induced by pile driving, but no evidence for water proof problem and damage of strain gage due to pile driving could be found. Based on the results of load transfer test. the steel toe bearing resistance and the shaft resistance (sum of the outer skin friction and soil plugging force) were measured separately, but soil Plugging force could not be separated. Steel toe bearing resistance was about 8% of ultimate pile capacity. Residual force induced by pile driving during pile installation was measured and, based on the results, load transfer characteristics of axial load were examined exactly.
An Estimation of Ultimate Holding Capaity of Vertical Anchor Plate using Limit Analysis
Kwon, Oh-Kyun ; Lee, Young-Saeng ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 251~251
The purpose of this study is to analyze the behavior of a vertical anchor plate under the horizontal forces embedded in granular soils. An experimental tests using carbon rods are conducted to define the actual failure surface around the plate anchors at the ultimate load, estimate the pressure acting on the front and in the back of the anchor, and determine the ultimate holding capacity of the vertical plate anchor. The ultimate holding capacity and the breakout factor by the lower and upper bound of limit analysis are also determined, and the results are compared with those determined by the model tests and the other methods.
An Experimental Study on Dynamic Characteristics of WBFS Admixture Roadbed Material
Kim, Soo-Il ; Lee, Sang-Won ; Choi, Doh-Woong ; Kim, Kyung-Hwan ; Kwon, Seung ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_2, 1998, Pages 261~261
In this study, vibration characteristics of water-quenched-blast-furnace-slag (WBFS) admixture roadbed material were investigated in order to develop a new construction method that can be applied to reduce the vibration of high speed railway. Free-free resonant column test which is a reliable and simple technique in small strain range was performed to evaluate general properties of WBFS admixture roadbed material. Mechanical impedance test. which assesses the dynamic characteristics of material on the basis of measured relationships between dynamic load and acceleration, was performed in the frequency range from 5 Hz to 130 Hz. The effects of cement content, inflating agent con-tent, dynamic strain and frequency were analyzed to understand the general tendency of the test results. Based on the free-free resonant column test results, it was found that storage modulus was
and damping ratio was
at the dynamic strain level of
and resonant frequency level of about 2000 Hz. From the results of mechanical impedance test. it was found that storage modulus was
and damping ratio was
at the dynamic strain range of
and resonant frequency range of
. Storage modulus had a tendency to increase as cement content increases and to decrease as inflating agent content increases. These results matched well with general dynamic characteristics of similar materials.