按结构影响系数设计的V形中心支撑钢框架抗地震倒塌安全性研究  

RESEARCH ON SEISMIC COLLAPSE MARGIN RATIO OF V-SHAPE CBSF CONSIDERING STRUCTURAL INFLUENCING COEFFICIENT

作　　者：齐永胜[1,2] 顾强[3] 赵风华[1] 

机构地区：[1]常州市建设工程结构与材料性能研究重点实验室(常州工学院),江苏常州213002 [2]河海大学土木与交通学院,南京210098 [3]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《工业建筑》2015年第6期145-149,共5页Industrial Construction

基　　金：城乡和住房建设部资助项目(2014-K2-038,2014-K1-041);国家自然基金资助项目(50578099)

摘　　要：通过对5个按7度抗震设防的典型V形中心支撑钢框架采用FEMA P695抗地震倒塌安全性评估体系,对其抗地震倒塌安全性进行研究。结果表明:基于结构影响系数R=3.2设计的7度抗震设防V形中心支撑钢框架,具有足够的抗地震倒塌能力,能提供安全的使用空间。进一步的研究表明,该结构具备比"大震不倒"更强的抗地震倒塌能力,能够"特大地震不倒",对结构抗震性态设计有一定参考价值。Five typical V-shape concentrically braced steel frames ( CBSF ) in zones of seismic intensity VII were designed and their seismic safety was studied according to seismic collapse assessment system of FEMA P695.The results show that the CBSFs based structural influencing coefficient R=3.2 possess enough anti-collapse capacity, can provide safe room, furthermore, they possess stronger anti-collapse capacity than that of ‘no callapse in strong earthquake’ , so that their collapse probability can be accepted under specially strong earthquakes, which can be used in seismic performance-based design.

关 键 词：地震倒塌 倒塌富余度 中心支撑钢框架 IDA 安全性 

分 类 号：TU391[建筑科学—结构工程] TU312.3