我国7度设防等跨RC框架抗地震倒塌能力研究  

Study on the seismic collapse resistance of RC frame structures with equal spans in zones with seismic intensity Ⅶ

作　　者：陆新征[1] 唐代远[1] 叶列平[1] 施炜[1] 

机构地区：[1]清华大学土木工程系,清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《地震工程与工程振动》2011年第5期13-20,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金资助项目(90815025,51178249,51178250);国家科技支撑计划项目(2009BAJ28B01)

摘　　要：我国建筑结构抗震设计主要采用基于小震下的构件承载力计算保证结构的抗震承载能力,配合抗震构造措施保证结构的变形能力,缺乏大震抗倒塌定量计算。而实际地震震害表明,即使是同类结构,其结构体系参数对其抗地震倒塌能力也有很大影响。为此,本文依据《建筑抗震设计规范》GB50011-2001,按照7度抗震设防设计了24个不同跨度、层数和层高的RC框架结构,采用多个地震输入下的逐步增量弹塑性动力时程分析方法(IDA方法),对其抗地震倒塌能力进行了分析研究。结果表明,结构体系参数对其抗地震倒塌能力有重要影响,其中跨度和层数的影响最为显著。The seismic design of Chinese building structures is mostly depended on the structural elemental loading capacity design under minor earthquake and the detailed design to ensure the deformation capacity.However,it is lack of quantitative analysis of seismic collapse resistance under severe earthquake.And the actual seismic damage shows that even for the same structural types,the global structural parameters will greatly influence the seismic collapse resistances.Therefore,this paper designs 24 RC frame structures in zones with seismic intensity Ⅶ according to the Chinese Seismic Design Code,which have different spans,storey heights and storey number.Incremental dynamic analysis is performed for the structures to assess their seismic collapse resistance.The result shows that global structural parameters,especially the span and the storey number,have a great influence on the seismic collapse resistance.

关 键 词：框架结构 抗倒塌能力 增量动力分析 弹塑性动力时程分析 倒塌概率 

分 类 号：TU352[建筑科学—结构工程]