基于概率的减震矮塔斜拉桥的结构破坏评估研究
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摘要
本文以概率地震需求分析为基础,对天津永定新河特大桥主桥采用无阻尼器和有阻尼器的桥梁结构进行了抗震性能评价及对比。对地震动强度指标(IM)、工程需求参数(EDP)进行了研究,根据结构的地震需求危险性曲线,给出了该两种不同类型的结构在五十年内发生不同程度破坏的概率,从而为地震灾害损失评估提供依据。研究表明无阻尼器情况下,五十年内发生碰撞的超越概率为1.9%,接近极限超越概率;有阻尼器情况下,五十年内发生碰撞的超越概率为0.4%,能很好地满足性能水准要求。
In this paper,the seismic performance of the Yongdi ng New River Bridge in Tianjin main bridge without dampers and with damper were ev aluated and compared basing on the probabilistic seismic demand analysis.Indica tors of ground motion intensity measures(IM),engineering demand parameters(IM) were studied.The probability of occurrence of different damage of the two diff erent types of structures without dampers and with damper in the fifty years can be achieved according to the seismic demand hazard curves,which can provide th e basis for earthquake damage assessment.The results show that the exceeding pr obability of occurrence of collision is 1.9% when the structure without damper, which close to the limit of probability;The exceeding probability of occurrence of collision is 0.4% when the structure with damper,which meet the performance standard requirements well.
In this paper,the seismic performance of the Yongdi ng New River Bridge in Tianjin main bridge without dampers and with damper were ev aluated and compared basing on the probabilistic seismic demand analysis.Indica tors of ground motion intensity measures(IM),engineering demand parameters(IM) were studied.The probability of occurrence of different damage of the two diff erent types of structures without dampers and with damper in the fifty years can be achieved according to the seismic demand hazard curves,which can provide th e basis for earthquake damage assessment.The results show that the exceeding pr obability of occurrence of collision is 1.9% when the structure without damper, which close to the limit of probability;The exceeding probability of occurrence of collision is 0.4% when the structure with damper,which meet the performance standard requirements well.
引文
[1]中国建筑设计研究院,亚太建设科技信息研究院.国内外地震灾害和灾后重建经验与对策研究[R].2009.3
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[9]Erberic M A,Elnashai A S.Vulnerability anslysis offlat slab structures[C].Proceedings of the 13th WorldConference on Earthquake Engineering,Vancouver,Canada,CD-ROM,No.3102,2004.
[10]John L B,James M L,Joseph P W,et al.Seismic e-valuation of vulnerable highway bridges with wall pierson emergency routes in southern Illinois[C].Proceed-ings of the 13th World Conference on Earthquake Engi-neering,Vancouver,Canada,CD-ROM,No.286,2004.
[11]Seiichiro F,Harumi Y.Seismic performance level ofbuildings considering risk financing[C].Proceedingsof the 13th World Conference on Earthquake Engineer-ing,Vancouver,Canada,CD-ROM,No.41,2004.Study on the Structural Damage of the Low-tower Cable BridgeBase on ProbabilisticLV Jing
[2]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[3]张艳玲.中国地震台网:全球每年平均发生18次7级以上地震[EB/OL].2010-04-15.http://www.china.com.cn/news/2010-04/15/content_19827689.htm.
[4]刘建新,赵国辉.“5.12”汶川地震典型桥梁震害分析[J].建筑科学与工程学报,2009,26(2),92-97.
[5]中国地震信息网.唐山地震综述[EB/OL].http://www.csi.ac.cn/hxz/zhuanji/20060627011.htm,2006-06-27.
[6]Joonam P,Barry G,Ann B,et al.Probabilistic deci-sion analysis for seismic rehabilitation of a regionalbuilding system[C]∥Proceedings of the 13th WorldConference on Earthquake Engineering,Vancouver,Canada,CD-ROM,No.2254,2004.
[7]Omer O E,Daniel P A.A methodology to assess seis-mic risk for populations of unreinforced masonry build-ings[C]∥Proceedings of the 13th World Conferenceon Earthquake Engineering,Vancouver,Canada,CD-ROM,No.2445,2004.
[8]H Aslani,E Miranda.Probabilistic response assess-ment for building-specific loss estimation[R].Collegeof Engineering Universitye of California,Berkeley.PEER Report,2003.
[9]Erberic M A,Elnashai A S.Vulnerability anslysis offlat slab structures[C].Proceedings of the 13th WorldConference on Earthquake Engineering,Vancouver,Canada,CD-ROM,No.3102,2004.
[10]John L B,James M L,Joseph P W,et al.Seismic e-valuation of vulnerable highway bridges with wall pierson emergency routes in southern Illinois[C].Proceed-ings of the 13th World Conference on Earthquake Engi-neering,Vancouver,Canada,CD-ROM,No.286,2004.
[11]Seiichiro F,Harumi Y.Seismic performance level ofbuildings considering risk financing[C].Proceedingsof the 13th World Conference on Earthquake Engineer-ing,Vancouver,Canada,CD-ROM,No.41,2004.Study on the Structural Damage of the Low-tower Cable BridgeBase on ProbabilisticLV Jing
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