【摘要】 为了评估钢框架结构的倒塌储备能力,按我国现行规范设计了4个钢框架算例,采用美国ATC委员会提出的CMR分析方法对钢框架结构倒塌储备能力进行了分析,得出其相应的倒塌储备系数和倒塌概率曲线。分析结果表明,平面、立面布置相同的多层钢框架,层数较多者其倒塌储备能力较层数少者弱;按8度(0.2g)抗震设防要求设计的多层钢框架在遭遇特大地震时倒塌储备能力不足。更多还原

【Abstract】 In order to evaluate the seismic collapse margin of steel frames,this paper designed four different steel frames according to "Code for Seismic Design of Building"(GB50011-2001),analyzed the seismic collapse margin of steel frames by CMR analytical method proposed by ATC(Applied Technology Council) committee of America,and obtained the corresponding collapse margin ratio and the collapse possibilities under different ground intensities.The results show that among the multi-story steel frames with the same plane and elevation,the frame with more stories has weaker capacity of collapse margin than the one with less stories.The multi-story steel frames designed according to seismic-resistance requirements have weaker capacity of collapse margin under the strong earthquake.更多还原