Application of vulnerability analysis in structural capacity assessment and enhancement  

作　　者：于刚 孙智 孙利民 

机构地区：[1]State Key Laboratory on Disaster Reduction of Civil Engineering,Tongji University [2]Shanghai Municaipal Engineering Design Institute(Group) co.

出　　处：《Journal of Harbin Institute of Technology(New Series)》2011年第3期131-138,共8页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Key Program of National Nature Science Foundation of China (Grant No. 50538020);the National High Technology Research and Development Program of China (Grant No. 2006AA11Z109);the Key Research Project of Chinese State Key Laboratory for Disaster Reduction in Civil Engineering (Grand No. SLDRCE08-A-05)

摘　　要：This paper presents a structural vulnerability analysis method based on the theory of plastic limit analysis.By applying the mechanism generation method,the ultimate loading factor and the corresponding failure mode of a structural system can be obtained.The ultimate loading factor was then used to measure the performance of a structural system.The variation of this factor to different damage scenarios due to vehicle collision was investigated.To illustrate the proposed method,two cases study on statically determinate and statically indeterminate truss bridge were performed.The results of the case study showed that the susceptibility of structure performance to local damage scenarios not only depends on the location but also the severity of the damage scenarios.Based on this analysis,structural capacity can be evaluated and structural management and maintenance strategy can be made more efficiently.This paper presents a structural vulnerability analysis method based on the theory of plastic limit analysis. By applying the mechanism generation method, the ultimate loading factor and the corresponding failure mode of a structural system can be obtained. The ultimate loading factor was then used to measure the performanee of a structural system. The variation of this factor to different damage scenarios due to vehicle collision was investigated. To illustrate the proposed method, two cases study on statically determinate and statically in- determinate truss bridge were performed. The results of the case study showed that the susceptibility of structure performance to local damage scenarios not only depends on the location but also the severity of the damage scenarios. Based on this analysis, structural capacity can be evaluated and structural management and maintenance strategy can be made more efficiently.

关 键 词：VULNERABILITY PLASTIC LIMIT analysis FAILURE mode damage SCENARIO REHABILITATION 

分 类 号：TU312[建筑科学—结构工程]