• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2011.04a
• /
• pp.239-242
• /
• 2011

본 연구에서는 모듈러 강교량의 상부구조 구성요소에 대한 정보의 교환, 검색, 공유가 가능한 데이터사전을 구축하였다. 표준모듈의 계층정의를 위해 기존 교량분류체계를 기반으로, PLIB Part 42에서 제시하는 패밀리 조직 방법론을 적용하였다. 분류된 구성요소와 모듈에 대한 정보의 쉬운 검색 및 접근을 위하여 이름, 동의어, 정의 등과 같은 속성을 정의하였다. 또한 모듈의 형상표현이 가능하도록 속성을 정의하여, 파트라이브러리 시스템의 구성요소인 라이브러리 컨텐츠에 저장된 모듈라이브러리의 사용성을 용이하게 하였다.

• Journal of Korean Society of Steel Construction
• /
• v.20 no.2
• /
• pp.259-268
• /
• 2008

This paper proposes a method to establish an optical lifetime maintenance strategy for deteriorating bridges in consideration of life-cycle performance and cost. A program is developed based on the proposed method, which can generate optimum maintenance scenarios not only at the individual member level but also at the system level of the bridge. By applying the developed program is studied through the comparative analysis of maintenance strategies generated at each level. According to the results of comparison between maintenance strategies of the member-level analysis and system-level analysis. It is expected that the establishment of a maintenance strategy through the bridge system-level analysis considering target, members reflects practical and reasonable results.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2004.11a
• /
• pp.521-525
• /
• 2004

The objective of this study is to implement a WBS (Work Breakdown Structure) so as to support efficient information management through the construction process of Steel Box Girder Bridge. To meet this requirement. This study performs the analysis of the business process. Through the work, information flows and information management levels are identified. Information management in each manufacturing process was various in its level. For the efficient information management, skating and utilization in schedule, cost, resource, and quality management, it is recommended to utilize a WBS composed of major work section and element structure of the steel box girder.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.3A
• /
• pp.523-532
• /
• 2006

It is thought that the suggestion of efficient and rational design guideline based on the behavior evaluation of bridge structure system the included cross beam is necessary for the construction efficiency of two-I girder steel bridges. Therefore, in this study, the effects of influence parameters are investigated by the behavior analyses of the bridges, in which the influence parameters are location, spacing and rigidity of the cross beam. For this study, the existed two-I girder steel bridges firstly were selected with the model of case study and the FE analyses for some case models were performed to estimate the action of the cross beam in the bridge. From the analyses, it was estimated that if it consider local stress and load distribution of a floor system, shell and solid elements are compatible to modeling of the cross beams. Also, the efficient design guideline for the cross beam of two-I girder steel bridge was suggested from parameter studies used location, spacing and rigidity of the cross beam.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.3A
• /
• pp.161-169
• /
• 2012

This paper presents the safety and strength of simplified composite H-beam panel bridges (SCHPBs) using 3-dimentional finite-element program, ABAQUS (2007) and experimental tests. Two finite-element models (one-steel-girder-and-composite-deck model and four-steel-girder-and-wide-composite-deck model) were reviewed to predict the strength and load distribution factor (LDF) values of the composite bridges. Based on the results of the finite-element analyses, the behaviors of the two models were investigated, and deflection and strain gauges for the experimental specimens were set up to obtain the ultimate strengths and the LDF values. The ultimate strength of the one-steel-girder-and-composite-deck specimen was estimated to be 840 kN. The yield and plastic moments of the four-steel-girder-and-wide-composite-deck specimen were obtained to be 2.4 and 4.1 times the design moment based on the live loading condition of the Korea Bridge Design Specifications (2005). The SCHPB were found to have enough strength for safety under and after construction.

• Journal of the Korean Society for Railway
• /
• v.12 no.4
• /
• pp.574-581
• /
• 2009

Displacement of the bridge and additional rail stress due to interaction between track and bridge should be limited to the design criteria. Interaction analysis was conducted to investigate the displacement and additional rail stress on CWR in railway bridge of conventional line. Particularly, various parameters affecting interaction phenomena were taken into account in the analysis to enhance an applicability. These parameters included configuration of structure, stiffness of deck and support, steel/concrete bridge, ballast/concrete track and FM/MFM type etc. The results were presented in the form of the design chart which could be useful in preliminary design of the bridge.

• Journal of the Korean Society for Railway
• /
• v.12 no.4
• /
• pp.565-573
• /
• 2009

Displacement of the bridge and additional rail stress due to interaction between track and bridge should be limited to the design criteria. Interaction analysis was conducted to investigate the displacement and additional rail stress on CWR in high speed railway bridge. Particularly, various parameters affecting interaction phenomena were taken into account in the analysis to enhance an applicability. These parameters included configuration of structure, stiffness of deck and support, steel/concrete bridge, ballast/concrete track and FM/MFM type etc. The results were presented in the form of the design chart which could be useful in preliminary design of the bridge.

• Proceedings of the Korean Institute of Industrial Safety Conference
• /
• 1997.11a
• /
• pp.283-288
• /
• 1997

도로와 철도에서 사용되는 강교량에는 최근 차량의 중량화 등에 의해 피로손상이 발생되고 있으며, 이러한 피로손상은 성수대교 붕괴사고나 당산철교 철거등에서와 같이 주로 구조물의 공용중에 발생되기 때문에 이로 인한 사회적$\cdot$경제적 손실은 실로 막대하다. (중략)

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.12 no.4
• /
• pp.195-202
• /
• 2008

Underestimation of the capacity can have serious economic consequences, as deficient bridges must be posted, repaired or replaced. Accurate prediction of bridge behavior may allow for more bridges to remain in service with or without minor repairs. The presented research is focused on the reliability evaluation of the actual load carrying capacity of existing bridges based on the field testing. Reliability analysis is performed on 17 previously tested bridges. Bridges are first evaluated based on the code specified values and design resistance. However, after the field testing program, it is possible to apply the experimental results into the bridge reliability evaluation procedures. The girder distribution factors obtained from the tests are also applied in the reliability calculation. The results indicate that the reliability indices of selected bridges can be significantly increased due to the reduction of uncertainties without sacrificing the safety of structures, by including the result of field measurement data into calculation.

• Journal of Korean Society of Steel Construction
• /
• v.18 no.5
• /
• pp.633-642
• /
• 2006

Serviceability design is required to control the cracking at the joint of precast decks with longitudinal prestress in continuous composite bridges. Details of twin-girder bridges are especially complex not only due to their main reinforcements and transverse prestresses for the design of long-span concrete slabs, but also due to the shear pockets for obtaining the composite action. This paper suggests the design guidelines for the magnitude of the effective prestress and for the selection of filling materials and their requirements that would allow for the use of precast decks for twin-girder continuous composite bridges. The necessary initial prestress was also evaluated through long-term behavior analysis. From the analysis, existing design examples were revised and their effectiveness was estimated. When a filling material with a bonding strength higher than the requirement is used in the region of a high negative moment, a uniform configuration of the longitudinal prestressing steels along thewhole span length of continuous composite bridges can be achieved, which would result in the simplification of the details and the reduction of the construction costs.