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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
A Study on the Determination of Minimum Interchange Spacing on Freeway
Kim, Sang-Gu ; Park, Chang-Ho ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 1~1
A freeway interchange with a ramp has been built for the purpose of improving the function of a highway and preserving a successive flow. However, a short interchange spacing has a great effect on mainline traffic stream by merging, diverging, and weaving phenomena. Therefore, it is important to determine a proper interchange spacing to minimize such influences on the aspect of traffic operations. In this study, a minimun interchange spacing is determined by the Markov Chain, which is mathematical probability model, considering lane changing behaviors on the freeway-ramp junction. The minimum interchange spacing may be broadened with greater influencing boundary, increasing number of lanes and higher LOS. At LOS D, minimum interchange spacing was calculated at 1.9 Km, 3.2 Km, 5.0 Km for 4-lanes, 6-lanes, and 8-lanes of both direction, respectively. The results in this study were obtained by utilizing traffic characteristics of merging/diverging areas. and the minimum interchange spacing has been suggested in order to prevent the occurrence of breakdown and the capacity reduction through effective treatment of traffic flow.
Analysis and Modeling for Multiple Route Choice Behavior in the Presence of Travel Time Information
NamGung, Moon ; Sung, Soo-Lyeon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 11~11
As traffic congestion increases in urban areas, providing traffic information on route choice is a variable strategy for traffic system manegement and operation. Stated preference survey to evaluate the effect of drivers' behavior with travel time information on multiple route choice was done for those people in the Chun-Ju City who commute to and from work everyday. The survey consists of the prediction of travel time for each route, drivers' response to travel time information and an image for each route. Statistical analysis of drivers' characteristics and modeling of drivers' behavior by the multinomial legit were performed. From the results, We found that the group of drivers who didn't switch the route even if travel time information was provided was between 30 to 40 percentage. And, Drivers' route choice behavior on multiple route depends on the travel time information. The results of modeling show that these models provide reasonable results in terms of behavioral and statistial considerations for the multiple route choice.
Factor Analysis on Driver's Inter-Urban Route Choice
Seo, Chae-Yeon ; Lee, Yu-Ok ; Sung, Soo-Lyeon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 21~21
In this paper, surveys of driving behaviour and road-image were conducted to examine the reasons why for drivers to choose between the Honam Highway and 22nd State Road both connecting Kwangju and Sunchoen area. The results of the surveys were subjected to factor analysis. The factor analysis revealed that peoples' impressions of the Honam highway were improved considerably since it has reopened as four lane road, but this perception had little effect on driver preference for the 22nd State Road and route choice behavior. Among fourteen items concerned with drivers' impressions of these two roadways, prior to the reopening of the extended Honam highway. the quality of periodicality was scored high. After the reopening, stability and comfort were also described as significant elements of drivers' experiences on the road. Before reopening of extended Honam highway, drivers selected the driving condition and low costs as reasons for preferring State Road 22. After the Honam Expressway reopened, low costs jumped in importance as a reason for selecting State Road 22.
A Study on the Estimation of Effective Modulus of Asphalt Concrete Layer
Kim, Soo-Il ; Choi, Jun-Seong ; Im, Sang-Bin ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 31~31
A numerical method to estimate the effective modulus of asphalt concrete (AC) layer was developed. The effective modulus represents temperature-dependent moduli of asphalt concrete layer varying temperature gradient as a single layer modulus. To determine the temperature-dependent effective modulus of AC layer, a numerical method to predict the temperature gradient in AC layer was developed. The predicted temperature gradient gave reasonable results when compared with the measured values in AC layer. The AC layer was converted to six layers having different elastic moduli according to temperature gradient by using temperature-elastic modulus relation model. The effective single modulus which gives the same deflection basin as the AC layer with six divided layers was evaluated using the layered elastic theory. It was found that effective moduli estimated by the procedure proposed in this study gave reliable results when compared with the results from Aaphalt Institute and North Carolina State University proposals respectively.
Development of Optimum Backcalculation Procedure for Evaluation of Layer Properties of Asphalt Concrete Pavement from Deflection Basins of FWD
Kim, Soo-Il ; Choi, Jun-Sung ; Lee, Yang-Ku ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 41~41
An analytical technique and a computer code to evaluate layer properties of asphalt concrete pavement from deflection basins of Falling Weight Deflectometer (FWD) were developed in this study. Newton-Raphson method was adopted to compute parameters in the iteration process. It was found that seed moduli had little influence on the results of backcalculation in evaluating moduli of 3 or 4 layered asphalt pavement. The robustness of Newton-Raphson method was verified through comparison with othor backcalculation programs such as MODULUS. MODCOMP, and MFPD. The computer code developed in this study can also be applied to find out the correct thickness of asphalt layer. A technique to determine the depth to virtual rigid base was proposed through the analysis of compression wave velocity and FWD impulse loading durations. The depth from surface to virtual rigid base was found to be
Evaluation of Tensile Properties of Polymer-Modified Asphalt Concretes
Kim, Kwang-Woo ; Ahn, Kyoung-Ae ; Joe, Hee-Won ; Li, Xiang Fan ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 53~53
SBS and LDPE polymer modified asphalt with contents of 3%, 4%, 5% and a carbon black with content of 10% by wt. of asphalt were used in three aggregate mixtures, a gneiss, a granite and a limestone waste aggregates. Indirect tensile strength and stiffness index were evaluated for each mixtures. The two polymers were effective on improving those strength characteristics for all three aggregate mixtures. Especially, tensile properties of limestone and granite aggregates were improved more than those of gneiss. Among two polymers, there were almost no difference in performance even though LDPE showed a little higher values. Carbon black improved the properties of plain asphalt mixtures, although it was not always the case for the PMA mixtures.
Evaluation of Recycled Asphalt Mixture as Potential Replacement for Asphalt-Treated Base Course Materials
Kim, Kwang-Woo ; Jeong, Kyu-Dong ; Doh, Young-Soo ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 61~61
This study was conducted to evaluate the possibility using reclaimed asphalt pavement. After testing the characteristics of reclaimed asphalt pavement material which was collected from road reconstruction site, a recycled asphalt mixture was made with 40% reclaimed material and 60% virgin material. A mix design was carried out with a virgin asphalt (AC 85-100) for a base course material. An optimum asphalt content was decided at 4.7%. The measured Marshall stability, air void, flow and indirect tensile strength (ITS) of recycled mixture were 1,368 kg, 7%, 35 and
, respectively. After freezing-and-thawing conditioning. ITS was
and the stability was 802 kg, which is still very higher than specification limit. 350 kg. Therefore it was concluded that the designed hot-mix recycled asphalt base course mixture using 40% reclaimed pavement materials satisfied the domestic specification for virgin materials and was good enough to use for the purpose.
Concrete Overlay for Concrete Pavement Rehabilitation
Yun, Kyong-Ku ; Eum, Joo-Yong ; Suh, Young-Chan ; Kwon, Soon-Min ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 69~69
This research, focused on the applications of concrete overlay and a field test, was conducted to calibrate design method at 88 Highway 105 km, 2 lanes of 290 m. The field test consists of 6 cm and 10 cm bonded concrete overlay and 25 cm unbonded concrete overlay, using the slag cement for early traffic opening. These overlays were placed in 1 day. The whole period of traffic closing was 8 days and it was reopened to traffic after 3 days of curing time. 5 cracks were found when the field test section was investigated after 1 month, but all these cracks may not make significant problems to overlay because these initiated and groved at the same line of repair section. The rideability and skid resistance of overlay become as good as in the new pavement. The structural capacity against deflection was much increased, which were verified by FWD (Falling Weight Deflectometer). The field test section is being used in a good condition and the results of field application and pavement performance analysis are encouraging. This rehabilitation methods may be implemented in Korea after additional performance verifications.
Upgrading the Accuracy for the Characteristics of Block Adjustment with Analytical Aerial Triangulation
Park, Woon-Yong ; Youn, Kyung-Chul ; Shin, Sang-Cheal ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 81~81
Surveying technology has played a major role in the field of mapping e earth surface. It is widely appreciated that aerial photogrammetry among surveying techniques is one of very economical methods in mapping and positioning the physical reality. The objective of the study is to investigate the aerotriangulation on upgrading the accuracy. The experiments were performed on 3 different blocks with different configurations such as the number of control points, the distribution of control points and different overlap percentage. Conclusively, it was found that the positioning accuracy was influenced very much by the size of errors in the control points and the systematic errors in the measurement values.
Interrelation Analysis of Pine Gall Midge and Acid Rain Using Satellite Data
Kim, Eung-Nam ; Keinosuke, Gotoh ; Yang, In-Tae ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 93~93
In this study, an attempt was done to analyze the damaged areas by pine gall midge in PYONGCHANG county by using the LANDSAT/TM data observed on Nov. 12, 1984 and Oct. 20, 1993. This county has suffered most serious damage in the forest areas caused by pine gall midge in KANGWON prefecture, KOREA. The method of Normalized Difference Vegetation Index is used to detect the damage situation for the passed 10 years. A normal recovery of the damaged areas was observed 7 years after the first damage has occurred. But, there was a lot of pines died and never resurrect again in some areas. The reason of this phenomenon may due mainly to the acid rain in that areas. Therefore the relationship between the damaged areas and the acid rain is considered in this study. As a result of this study, the damage state and the distribution pattern of the damaged areas in PYONGCHANG county are clearly understood. The acid rain (pH less than 5.6) is observed on the whole KANGWON prefecture in the 1990's and also the Rainfall intensity of pH less than 5.0 is increased by 10 times in 1995 compared with rainfall intensity of the same pH observed in 1991.
The Integration of the Analytic Hierarchy Process and the GIS
Jun, Chul-Min ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 103~103
Geographic information systems (GIS) have emerged as useful decision support tools for spatial description and manipulation offering unique capabilities of automating, managing, and analyzing a variety of spatial data. Although the usability of GIS has been proved in a variety of applications, there also have been some research issues about that the coupling of GIS with other mathematical or engineering tools is necessary to meet various needs of specialized problem domains. The Analytic Hierarchy Process (AHP) is a decision analysis technique used to evaluate complex multiattributed alternatives with multiple and conflicting decision factors. The purpose of this study is to develop a strategy to facilitate multicriteria decisionmaking processes such as site selection in the presence of different priorities and uncertainties among the decision criteria. This study illustrates a method for constructing an integrated system of the Arc/Info GIS and the AHP module, and applies it to a site selection problem that searches for candidate communities for manufacturing in the regional scale.
Psi-s Matching of Zero-Crossing for Feature-Based Matching
Yoo, Hwan-Hee ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 115~115
One of the most fundamental processes in Digital photogrammetry is to identify and measure conjugate points in two stereo images. Stereo images matching means identification of correspondent points in two stereo images that are the projection of the same object point. The matching algorithms can be divided into two classes: one is the Area-Based Matching and the other is the Feature-Based Matching. The first method directly operates on the gray values of the original raw images. So, it is direct and easy way for the matching. But it requires a lot of computational time. The second method, on the other hand, operates on a feature which is derived from the images. Compared to the first method, Feature-Based Matching is computationally fast and the result is more reliable and meaningful. In this paper,
matching for Feature-Based Matching are proposed for the image matching. The feature used is the Zero-Crossing, DoG operator and a edge following algorithm are used to obtain the Zero-Crossing.
is used to represent the Zero-Crossing for image matching. Correspondent segments of Zero-Crossing in left and right image are obtained by the
vertex matching and
Seismic Analyses on Bearing Capacity of Shallow Foundation and Earth Pressure Considering Dilatancy
Hwang, Jung-Kyu ; Shin, Dong-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 125~125
Volume changes during shear(or dilatancy) are a unique characterictics of granular materials, which may affect badly the stability analysis of ground. However the conventional methods, such as limit analysis method, slip line method and limit equilibrium method, use the complete plastic model or complete elasto-plastic model as an idealized stress-strain relation, so that those methods can't consider dilatancy characteristics of soil. Roscoe has proposed the zero extension line theory which can sufficiently consider the dilatancy phenomina of soil. And its validity has been theoretically and experimently proved to be reasonable. However the present zero extension line theory is limited to only static problems in relation to ground stability, so it is necessary to extend the current zero extension line theory to dynamic problems such as stability problem during an earthquake. Therefore in this study an extension of the present static zero extension line theory to dynamic problem was made for bearing capacity problem of shallow foundation and earth pressure problem.
A Study on the Behavior of Vertical Plat Anchor under Horizontal Forces in Sands
Lee, Yeong-Saeng ; Kwon, Oh-Kyun ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 141~141
To study the behavior of a vertical plate anchor under horizontal forces in sands widely used in retaining walls and sheet piling walls, load tests on model ground made of carbon rods were carried out. The model may be considered to simulate the plane strain condition. The pressure distribution near a plate anchor. the failure mechanism of the ground around a plate anchor the ultimate holding capacity, and the load-horizontal displacement relationship were studied. As a result of this study, the critical embedment ratio (H/h)cr, differentiating a shallow anchor from a deep anchor was about 8, and the breakout factor at (H/h)cr. was about 8.5. The failure mechanism was coincided with that of the Terzaghi's theory and was similar to that of the Biarez et at.'s theory. The failure surface was gradually changed from a straight shape to a curved shape as the embedment depth was increased, and the shape was relatively similar to that of the Biarez et at.'s theory. The holding capacity of a deep anchor was slowly increased to reach the maximum value compared to that of a shallow anchor. The passive pressure was developed in front of the plate anchor and the active pressure at the back of the plate. And assuming the failure of the ground was reached at the maximum passive resistance, the pressure on the active side was already reached to the minimum. The load-displacement relationship approximated as a hyperbolic curve was coincided with the result by Das and Seely at relatively shallow anchors. From the results of this research, the fact that the behavior of a deep anchor is remarkably different from that of a shallow anchor was confirmed. And this results can be used as basic data for the design criteria of anchors.
The Effect of Stress History on Secondary Compression of Clayey Soils
Lee, Su-Hyung ; Chung, Choong-Ki ;
Journal of The Korean Society of Civil Engineers, volume 18, issue 3_1, 1998, Pages 151~151
Secondary compression characteristics of clayey soils are strongly related to not only plasticity index and but also stress history (i.e., OCR and magnitude of preconsolidation pressure). In this paper, secondary compression behaviors were investigated by laboratory tests. Soil samples, including 3 remolded samples with varying plasticity index and 1 undisturbed sample, were prepared to have different stress history by loading-unloading processes in oedometer apparatus, and then long term responses of soils were studied by loading more than 10 days at specific loading condition. The results show that the coefficients of secondary compression for overconsolidated state are much lower than those for normally consolidated state in wide range of plasticity index, but remain constant with increasing OCR values. Increasing preconsolidation pressures results in decreasing the coefficient of secondary compression for low plastic clayey soils. Also, linearity of relation between secondary compression and loarithmic time is lowered in overconsolidated soils.