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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 29, Issue 6D - Nov 2009
Volume 29, Issue 6C - Nov 2009
Volume 29, Issue 6B - Nov 2009
Volume 29, Issue 6A - Nov 2009
Volume 29, Issue 5D - Sep 2009
Volume 29, Issue 5C - Sep 2009
Volume 29, Issue 5B - Sep 2009
Volume 29, Issue 5A - Sep 2009
Volume 29, Issue 4D - Jul 2009
Volume 29, Issue 4B - Jul 2009
Volume 29, Issue 4A - Jul 2009
Volume 29, Issue 4C - May 2009
Volume 29, Issue 3D - May 2009
Volume 29, Issue 3C - May 2009
Volume 29, Issue 3B - May 2009
Volume 29, Issue 3A - May 2009
Volume 29, Issue 2D - Mar 2009
Volume 29, Issue 2C - Mar 2009
Volume 29, Issue 2B - Mar 2009
Volume 29, Issue 2A - Mar 2009
Volume 29, Issue 1D - Jan 2009
Volume 29, Issue 1C - Jan 2009
Volume 29, Issue 1B - Jan 2009
Volume 29, Issue 1A - Jan 2009
Selecting the target year
Predictive Modeling of the Bus Arrival Time on the Arterial using Real-Time BIS Data
Kim, Tae Gon ; Ahn, Hyeun Chul ; Kim, Seung Gil ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 1~9
Bus information system(BIS), as a part of the intelligent transportation system(ITS), is one of the most advanced public transportation systems which provide the real-time bus traffic information for the users waiting the buses at the bus stop. However, correct bus information data, such as the present bus location, the user waiting time, the bus arrival time, etc. are not provided for the bus users because the proper bus arrival time predictive models are not used yet in most of the cities operating the bus information system, including the metropolitan City of Ulsan. Thus, the purpose in this study is to investigate real-time bus traffic characteristic data for identifying the bus operation characteristics on the arterial under the study in the metropolitan City of Ulsan, analyze real-time bus traffic characteristic data on the ID locations of the arterial under the study, construct the optimal unit segment models for the unit segments which are the bus stop, node and travel section using the exponential smoothing, weighted smoothing and Kalman Filter methods, respectively, and finally suggest the optimal integrated model for predicting the real-time bus arrival time at the bus stop of the arterial under the study.
Estimation of Total Travel Time for a Year on National Highway Link with AADT
Kim, Jeong Hyun ; Suh, Sunduck ; Kim, Taehee ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 11~16
The estimation of total travel time on highway link for a day or year is the most important process for the feasibility analysis of highway or railway. Most of current guidelines for feasibility studies have been based on the time-traffic volume relationship from the BPR, and the traffic volumes have been determined by the application of the design hour factor to the annual average daily traffic volume. Both of the BPR function and the application of the design hour volume may result in the over-estimation of travel time due to the fact that the traffic volume on the large portion of highway links in Korea are close to the capacities. This study proposed a new way which is based on the distribution of hourly volumes for a year. It could be closer to the real situation, and provide more reasonable estimation. This methodology was validated for the national highways, but may be applicable for any type of highway with the AADT.
Improvement of Optimal Bus Headway for Intermodal Transfer Station
Ryu, Byoungyong ; Yang, Seungtae ; Bae, Sanghoon ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 17~23
Due to the rapid increase of vehicles on the street, Korean society is facing worsening traffic congestions and air pollutions. Also, the oil price pickup has led to increasing need for the use of public transportation. In particular, transfering among public transportation may be a main factor for riders who are commuting for a long distance journey. In order to ensure such connectivity, transfer stations have been actively built in Korea. However, it would be necessary to shift those vehicles, from cars to public transportations by enhancing the users' satisfaction with public transportation through strategies for minimizing the users' waiting cost by building an efficient connective system between transportation modes as well as the preparation of aforementioned transfer stations. Therefore, this study aimed to develop an algorithm for minimizing transferring passengers' waiting costs based on service intervals of linked buses within the transfer facilities. In order to adjust the service interval, we calculated the total costs, involving the wait cost of transfer passengers and bus operation costs, and produced an allocation interval, that would minimize the costs. We selected a KTX departing from Seoul station, and a No. 6014 bus route in Gwangmyeong city where it starts from the Gwangmyeong station in order to for verifying the model. Then, the transfer passengers' total waitting cost was reduced equivalent to the maximum of 212 minutes, and it revealed that the model performed very effectively.
Effectiveness Analysis of HOT Lane and Application Scheme for Korean Environment
Choi, Kee Choo ; Kim, Jin Howan ; Oh, Seung Hwoon ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 25~32
Currently, various types of TDM (Transportation Demand Management) policies are being studied and implemented in an attempt to overcome the limitations of supply oriented policies. In this context, this paper addressed issues of effectiveness and possible domestic implementation of the HOT lane. The possible site of implementation selected for this simulation study is part of the Kyung-bu freeway, where a dedicated bus lane is currently being operated. Minimum length of distance required in between interchanges and access points of the HOT lane for vehicles to safely enter and exit the lane, and traffic management policies for effectively managing the weaving traffic trying to enter and exit the HOT lane were presented. A 5.2km section of freeway from Ki-heuing IC to Suwon IC and a 8.3km section from Hak-uei JC to Pan-gyo JC have been selected as possible sites of implementation for the HOT lane, in which congestion occurs regularly due to the high level of travel demand. VISSIM simulation program has been used to analyze the effects of the HOT lane under the assumption that one-lane HOT lane has been put into operation in these sections and that the lane change rate were in between 5% to 30%. The results of each possible scenario have proven that overall travel speed on the general lanes have increased as well by 1.57~2.62km/h after the implementation of the HOT lane. It is meaningful that this study could serve as a basic reference data for possible follow-up studies on the HOT lane as one effective method of TDM policies. Considering that the bus travel rate would continue increase and assuming the improvement in travel speed on general lanes, similar case study can be implemented where gaps between buses on bus lane are available, as a possible alternative of efficient bus lane management policies.
Building a Model to Estimate Pedestrians' Critical Lags on Crosswalks
Kim, Kyung Whan ; Kim, Daehyon ; Lee, Ik Su ; Lee, Deok Whan ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 33~40
The critical lag of crosswalk pedestrians is an important parameter in analyzing traffic operation at unsignalized crosswalks, however there is few research in this field in Korea. The purpose of this study is to develop a model to estimate the critical lag. Among the elements which influence the critical lag, the age of pedestrians and the length of crosswalks, which have fuzzy characteristics, and the each lag which is rejected or accepted are collected on crosswalks of which lengths range from 3.5 m to 10.5 m. The values of the critical lag range from 2.56 sec. to 5.56 sec. The age and the length are divided to the 3 fuzzy variables each, and the critical lag of each case is estimated according to Raff's technique, so a total of 9 fuzzy rules are established. Based on the rules, an ANFIS (Adaptive Neuro-Fuzzy Inference System) model to estimate the critical lag is built. The predictability of the model is evaluated comparing the observed with the estimated critical lags by the model. Statistics of
, MAE, MSE are 0.96, 0.097, 0.015 respectively. Therefore, the model is evaluated to explain the result well. During this study, it is found that the critical lag increases rapidly over the pedestrian's age of 40 years.
The Operation Analysis of Signalized Intersections Using ICU Method
Kim, Young Chan ; Jeon, Jae Hyeon ; Jeong, Young Je ; Kim, Eun Jeoung ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 41~48
The capacity analysis of signalized intersection usually includes a HCM method used at home and abroad and a ICU method this study presents. The HCM method focuses on operation analysis measuring an intersection's delay in terms of given traffic volume, signal operation, and intersection structure data. This method includes planning and design analysis, but these analyses are complex due to being possible through repetitive operation analysis. However the ICU method is a powerful tool for planning and design analysis, because these are possible through brief traffic volume and geometry structure data and consider minimum green time. In this study, the authors studied the ICU method and compared the HCM and ICU by analyzing traffic volume scenarios. Also to consider effectiveness for application of the ICU method, the authors applied the ICU to capacity analysis of intersections on urban arterial for setting major intersection and effect analysis for changing crosswalk type, the number of lane, lane use and operation form of left turn. The result of the analyses shows that the ICU method can measure correct capacity of intersection consist of a broad road in urban area, and is effective for planning and design analysis. This study is expected that traffic experts can grasp correct intersection's capacity and carry out a proper planning or improvement by applying the ICU method to planning and design analysis.
Joint Stiffness Evaluation in Jointed Plain Concrete Pavement
Chon, Beom Jun ; Lee, Seung Woo ; Kwon, Soon-Min ; Kim, Seong-Min ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 49~54
The excellent load transfer at transverse joints ensures the high performance of jointed plane concrete pavements(JPCP). Load transfer efficiency(LTE) is affected by dowel-bars, aggregate interlock and types of underlying layers, and these factors have to be modelled adequately for a reasonable analysis of JPCP. Generally, the joint stiffness has been represented by a spring model for the shear transfer by aggregate interlock or dowels. However dowel-bars, aggregate interlock and types of underlying layers have not been considered together in the design of joints. In this study, the joint stiffness that considered those factors was presented by comparing LTE obtained using FWD(Falling Weight Deflectometer) with theoretical results obtained using the finite element analysis. In addition, the effects of temperature and concrete age, on the joint stiffness were investigated.
Freezing Depth Analysis Considering Environmental Factors and Physical Properties of Pavement Materials
Kim, Suk Myung ; Rhee, Suk Keun ; Kim, Suk Nam ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 55~61
In this research freezing depth analyses were performed for the recent 9 project field sites using FrostAM which is a freezing analysis model developed recently within the country and a model based on regional environmental factors and physical properties of pavement materials. The environmental factors needed for freezing depth analysis were obtained from the meteorological agency website. And there were laboratory tests and analyses using a measuring device for properties of unsaturated soil for the field site samples across country to obtain hydrographical properties among physical properties. The freezing depths analyzed by FrostAM were deeper in the range of 14cm~44cm than those based on freezing index. It is considered that the freezing depths based on freezing index were overestimated. And there are considerable differences among the freezing depths based on freezing index which were designed by different designers.
Asset Evaluation Method for Road Pavement Considering Life Cycle Cost
Do, Myungsik ; Kim, Jeunghwan ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 63~72
This study aims at establishing the decision-making support system for the highway assets, long-term performance presumption and evaluation of asset value, which are appropriate for Korea, and proposing the methods of the optimal engineering method and the timing decision for the preventive maintenance through the project evaluation, the optimization method and life-cycle analysis related to the highways. In order to supplement the current problem of the near-sighted budget management system, which chooses the maintenance place of the highway, depending on the level of the budget with fixed amount, the long-term required budget prediction system and the economy principle were introduced, so that the pavement agency can predict the level of the required budget, and it was aimed to develop the pavement asset evaluation system to maintain the performance of the highway with the minimum of the cost. In the use of the highway pavement asset evaluation system, to maintain the appropriate level of the pavement evaluation index, when the budget was efficiently established in the reference of the required maintenance budget for the chosen section of the highway in the year concerned, it was possible to analyze the most rational pavement maintenance budget. With this result, it is estimated to prevent the unnecessary waste of budget in advance, and through the development of the decision-making system for the long-term performance presumption and the asset value estimation of the pavement, it is expected to able to analyze the previous evaluation of the project related to the highway and the feasibility of introduction.
Experimental Study for Proposal of Concrete Removal Standard using Hydrodemolition Method
Jeong, Won-Kyong ; Kim, Ki-Heun ; Yun, Kyong-ku ; Kim, Yong-Gon ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 73~80
To repair the deteriorated concrete structures, the deteriorated parts should be removed by using surface treatment methods and replaced by new construction materials. Hydrodemolition is one of the most effective methods for chipping off the deteriorated concrete and treating the remaining concrete. The water jet can remove the deteriorated concrete without damaging the reinforcement steel and surrounding aggregates. Using the water jet system improves surface texture, which ensures to improve adhesive strength between new and old concretes. In this study, three different concrete slab strengths and two water jet machine sets were investigated. Experimental results showed the relationship between concrete strength and water jet condition and this would enable to provide the information of the domestic water jet system and specification, which would contribute to automatization and efficiency of concrete repairing and rehabilitation works.
A Study of Development of Change Process for Configuration Management in Construction Project Management
Ko, Ho-Un ; Park, Hyung-Keun ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 81~89
CM(Configuration Management) is a field of management that focuses on establishing and maintaining consistency of a product's performance and its functional and physical attributes with its requirements, design, and operational information throughout its life. Recently upcoming concept of CM, regardless of various definitions, consists of the organization and the process for value creation through project change management, value preservation by Risk, Project Management implementation by Change management. The CM provide a basis for, and a record of, the project's performance in meeting the scope, time, cost. Overseas international companies have already adopted the CM system and enjoyed the benefits arising from such systems. And the CM provides perspectives and insights applicable to all types of projects. This study presents the review on the current systems now in use at jobsites and known to be efficient, and the introduction and application of configuration systems now at big issue. Hereby indicates the connective system consisted of work process, change control and knowledge referring to the methods and actual cases as an effective promotion of CM.
Comparison Analysis Among Each Site Scale Evaluation Against Outdoor Space of Multi-Family Housing Complex
Choi, Yeol ; Yim, Ha Kyoung ; Cheong, Un Bin ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 91~100
The aim of this paper is to examine satisfaction of residents and preference on the outdoor space's design by multi-family housing complex scale. So we divide outdoor space into space for green land, space for physical training and play, space for walking and space for rest and landscape facilities. The major findings of this analysis are follows : Multi-family housing complex scale is the bigger, it is recognized by same ratio on specific outdoor space in housing complex that are space for green land, space for physical training and play, space for rest and landscape facilities. And space for physical training and play is found commonly into the poorest space in housing complex. Evaluation for resident's perception on outdoor space by multifamily housing complex scale shows that housing complex scale is the bigger, resident's satisfaction is the lower. That means that housing complex of large scale can't satisfy the diverse resident's demand.
A Barrier-free Design Assessment of Sidewalks for Improving Pedestrian Infrastructure
Kang, Jun Mo ; Lee, Gun Rock ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 101~110
Urban Designers and Planners are interested in creating barrier-free (BF) environments as the demand for social equity increases. BF design consists of design strategies for modifying buildings or facilities to be used by the physically disadvantaged or disabled. To construct buildings or facilities to be "Barrier-free", design standards specifically modified for the physically disadvantaged or disabled should be applied. The purpose of this study is to analyze the BF design standard used in the national laws and provide suggestions for their future improvements. In the study national laws in four countries were reviewed and important BF standards to be used in the laws were identified using a frequency analysis. The results of the frequency analysis were applied to the BF assessment criteria for sidewalk design. Then a field assessment for two sidewalks located in Seoul metropolitan region was conducted using the refined BF criteria. The findings from the field assessments indicated that current regulations were not appropriately designed to provide sufficient convenience for the disabled. It is needed to enhance the BF standards in the domestic regulations to offer sufficient mobility to the physically disadvantaged or disabled.
A Spatial Analysis of Transit Centers in Seoul Metropolitan Region for Developing Transit Oriented Urban Environments
Park, Se-Hoon ; Sohn, Dong-Wook ; Lee, Jin-Hee ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 111~120
Restructuring urban land use patterns from the motor-oriented to transit-oriented ones is a contemporary trend in urban planning and transportation. It is expected that transforming urban land use patterns to be transit and walking friendly would resolve various urban problems such as heavy energy consumptions, air pollutions, and traffic congestions. Korean cities have much potentials for developing transit-oriented urban environments in terms of its density and civil service levels, but the level of transit usage levels and the environmental quality of cities are not good enough for supporting such transition. The purpose of this study is to analyze the urban transit center areas and identify the problems to be solved to create transit-oriented urban environments. Case studies of four urban transit center areas in Seoul Metropolitan region were conducted to examine the spatial characteristics of urban transit center areas and identify their problems. Development density, land use diversity, walk-ability and transit connectivity were the primary feature of interests.
Construction of Geographic informations on King Sejong Station in Antarctica Using Lightweight Aerial Photogrammetry System
Yun, Bu Yeol ; Lee, Jae One ; Shon, Howoong ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 121~128
The King George Island, where the King Sejong Station is located, represents one of the gateways to the Antarctica from the point of its geographical aspect. It also serves as an advanced post, and plays an important role in the extending for Korea's Antarctic research activities. The existence of maps is not only a basic element for the constructing geographic informations supporting these activities, but also an implied way of announcing the sovereignty over the KingSejong Station in global world. However, the precise surveying for the geographic information has not been carried out, and thus topographical maps as well as geographic information assuring enough accuracy are still missed in this area. This fact had forced Korea to rely on using maps produced by foreign countries. Therefore, this study aims to generate digital topographical maps of 1: 5,000 scale for the constructing geographic information using lightweight aerial photogrammetry system first. And further, it will contribute to offer practical base data for the future research related to the Antarctic environment through the analysis of glacier retreat and change using this new digital map comparing with existing one.
Development of Close Range Photogrammetric Model for Measuring the Size of Objects
Hwang, Jin Sang ; Yun, Hong Sic ; Kang, Ji Hun ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 129~134
This study is on the development of photogrammetric methode for measuring the size of object without control points. The model is composed of interior orientation parameters, which are consist of specifications of CCD camera and lens distortion parameters, and exterior orientation parameters, which are calculated through relative orientation and scale adjustment. We evaluated the accuracy of the model to find that it is possible to measure the size of object using the model.
Multiple Reference Network Data Processing Algorithms for High Precision of Long-Baseline Kinematic Positioning by GPS/INS Integration
Lee, Hung-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 135~143
Integrating the Global Positioning System (GPS) and Inertial Navigation System (INS) sensor technologies using the precise GPS Carrier phase measurements is a methodology that has been widely applied in those application fields requiring accurate and reliable positioning and attitude determination; ranging from 'kinematic geodesy', to mobile mapping and imaging, to precise navigation. However, such integrated system may not fulfil the demanding performance requirements when the baseline length between reference and mobil user GPS receiver is grater than a few tens of kilometers. This is because their positioning/attitude determination is still very dependent on the errors of the GPS observations, so-called "baseline dependent errors". This limitation can be remedied by the integration of GPS and INS sensors, using multiple reference stations. Hence, in order to derive the GPS distance dependent errors, this research proposes measurement processing algorithms for multiple reference stations, such as a reference station ambiguity resolution procedure using linear combination techniques, a error estimation based on Kalman filter and a error interpolation. In addition, all the algorithms are evaluated by processing real observations and results are summarized in this paper.
Flood Runoff Simulation Using GIS-Grid Based K-DRUM for Yongdam-Dam Watershed
Park, Jin Hyeog ; Hur, Young Teck ; Ryoo, Kyong Sik ; Lee, Geun Sang ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 145~151
Recently, the rapid development of GIS technology has made it possible to handle a various data associated with spatially hydrological parameters with their attribute information. Therefore, there has been a shift in focus from lumped runoff models to distributed runoff models, as the latter can consider temporal and spatial variations of discharge. This research is to evaluate the feasibility of GIS based distributed model using radar rainfall which can express temporal and spatial distribution in actual dam watershed during flood runoff period. K-DRUM (K-water hydrologic & hydaulic Distributed flood RUnoff Model) which was developed to calculate flood discharge connected to radar rainfall based on long-term runoff model developed by Kyoto- University DPRI (Disaster Prevention Research Institute), and Yondam-Dam watershed (
) was applied as study site. Distributed rainfall according to grid resolution was generated by using preprocess program of radar rainfall, from JIN radar. Also, GIS hydrological parameters were extracted from basic GIS data such as DEM, land cover and soil map, and used as input data of distributed model (K-DRUM). Results of this research can provide a base for building of real-time short-term rainfall runoff forecast system according to flash flood in near future.
Matching Techniques with Land Cover Image for Improving Accuracy of DEM Generation from IKONOS Imagery
Lee, Hyo Seong ; Park, Byung Uk ; Han, Dong Yeob ; Ahn, Ki Weon ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 153~160
In relation to digital elevation model(DEM) production using high resolution satellite imagery, existing studies present that DEM accuracy differently show according to land cover property. This study therefore proposes auto-selection method of window size for correlation matching according to land cover property of IKONOS Geo-level stereo image. For this, land cover classified image is obtained by IKONOS color image with four bands. In addition, correlation-coefficients are computed at regular intervals in pixels of the window-search area to shorten of matching time. As the results, DEM by the proposed method showed more accurate than DEM using the fixed window-size matching. We estimate that accuracy of the proposed DEM improved more than DEM by digital map and ERDAS in agricultural land.
Accuracy Analysis of Ultra-high degree Earth Gravitational Model EGM2008 in South Korea
Huang, He ; Yun, Hong Sic ; Lee, Dong Ha ; Jeong, Tae Jun ;
Journal of The Korean Society of Civil Engineers, volume 29, issue 1D, 2009, Pages 161~166
High-resolution, high-precision ultra-high degree earth gravitational model are significant for the development of geodesy, geophysics, geodynamics and oceanography. In this research, we introduces the ultra-high earth gravitational model EGM2008 recently announced by U.S. NGA, reviews the issues and status of the ultra-high degree gravitational model development, and analyzes the accuracy of the gravitational model in Korea. First, EGM2008 is compared with the gravitational model EGM96 and Korea high-precision hybrid geoid model KGEOID08. In addition, the absolute accuracy is evaluated by ellipsoid height and orthometric height of a satellite geodetic reference point. Overall, the results show a similar accuracy between EGM2008 and KGEOID08. Thus, EGM2008 will be helpful for the future development of regional geoid and analysis of global gravity field.