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Reliability-based Redundancy Evaluation Method for Steel Plate Girder Bridges  

Joe, Woom Do Ji (부산대학교 사회환경시스템공학부)
Park, Yong Myung (부산대학교 사회환경시스템공학부)
Jin, Seung Hoon (부산대학교 사회환경시스템공학부)
Hwang, Min Oh (포항산업과학연구원 토목구조연구실)
Chung, Heung Jin (전주대학교 토목환경공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.5, 2009 , pp. 493-503 More about this Journal
Abstract
Bridge redundancy is defined as the capability of a bridge to sustain loads after one of its main members incurs damage. It is affected by many parameters, including the number of girders, span length, girder height, internal supports, and secondary members. The present AASHTO and Korean Bridge design codes, however, define bridge redundancy only as the number of girders, and neither the evaluation method nor the required level of redundancy is given. This study presented a redundancy evaluation method for plate girder bridges with severe fatigue damage based on the reliability method,by considering the essential parameters. A required level of redundancy was also proposed as a target system reliability index from the load capacity analysis and reliability analysis of the basis bridge designed by LRFD. Finally, the level of redundancy of simple and continuous plate girder bridges with a variable number of girders designed by ASD was evaluated and presented.
Keywords
steel plate girder bridge; fatigue damage; redundancy; nonlinear analysis; reliability method; system reliability index;
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Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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