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《Sichuan Building Science》 2013-04
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The research of seismic vulnerability of masonry building

SU Qiwang1,2,XU Hu1,ZHAO Shichun1,2(1.Southwest Jiaotong University,Chengdu 610031,China;2.Key Laboratory of Seismic Engineering of Sichuan Province,Chengdu 610031,China)  
Collapse safety is the most important objective of performance-based seismic design.Buildings should have enough safety margin to avoid collapse during severe or mega earthquake.However,current Chinese seismic design code does not have explicit design specification or quantitative evaluation for collapse-resistant capacity.Take a two-story masonry building as an example,the Pushover and IDA analysis are studied used by the equivalent frame,and the comparison are also studied.In addition,the fragility curves can be obtained.The analysis results show that the results of plastic hinge mainly appear in ground floor wall between windows and doors.The analysis result has good uniformity with seismic damage.Judging from the failure mechanism,Pushover and IDA analysis have very good similarity.In addition,they show elastic deformation is very small and brittleness is very apparent of the masonry building.Structure vulnerability analysis shows that the significant damage and the near collapse curves are very close to each other.This mean that,once the significant damage limit state is reached,only small PGA increments are need for reaching the near collapse limit state.
【Fund】: 中央高校基本科研业务费专项资金资助项目(SWJTU12CX078);中央高校基本科研业务费专项资金资助项目(2010XS01)
【CateGory Index】: TU364;TU311.3
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