摘要
由于汶川地震导致大量中小学校建筑倒塌,造成巨大伤亡,住建部、中国工程院和中国地震局分别提出了不同的校舍抗震设计加强要求,但这些加强措施的实际抗倒塌效果尚缺乏定量研究。本文采用纤维梁模型,并选择合适的箍筋约束混凝土本构,对汶川地震7度区典型钢筋混凝土框架结构教学楼进行了基于IDA的倒塌率分析,研究了不同抗震加强措施的防倒塌效果,进而给出了相应的设计建议。
In the Wenchuan Earthquake,many school buildings collapsed,which caused serious casualties.So after the earthquake,Ministry of Housing and Urban-Rural Development,China Academic of Engineering,and China Earthquake Administrator proposed different strengthening methods to upgrade the seismic design of school buildings.However,the actual effects of these proposals have not been quantitatively evaluated.So in this work,fiber-beam element model with validated stirrups confined concrete constitutive law is used to build the nonlinear finite element model of a typical reinforced concrete（RC） classroom frame in zones with seismic intensity Ⅶ during the Wenchuan Earthquake.The effects of different strengthening methods on collapse-resistance are studied with collapse-fragility analysis that is based on the incremental dynamic analysis（IDA）.Further design suggestions are then proposed.
出处
《地震工程与工程振动》
CSCD
北大核心
2011年第1期124-129,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家科技支撑计划项目(2009BAJ28B01)
工程院重大咨询项目(2010-ZD-4)
国家自然科学基金重点项目(90815025)
上海市工程结构新技术重点实验室开放课题(2010-KF04)
关键词
汶川地震
RC框架结构
倒塌率
防倒塌对策
抗震措施
Wenchuan earthquake
RC frame structure
collapse possibility
collapse-prevention
strengthening method
