摘要
为了评估Y型偏心支撑钢框架结构的倒塌储备能力,提出了一种针对于Y型偏心支撑钢框架结构的倒塌判定标准,并利用这个标准对不同设防烈度和不同层数的4个算例进行了IDA分析,得到了4个算例的倒塌储备系数和倒塌概率曲线。分析结果表明:相同条件按9度设计的Y型偏心支撑结构比按8度(0.2g)设计的结构倒塌储备能力弱,且层数越高其倒塌储备能力越弱。
In order to evaluate the seismic collapse margin of Y-eccentric braced steel fralnes,proposed a criterion to judge the collapse of this structure, and use this criterion to analysis four examples of different seismic fortification intensity and different layers, then obtained the corresponding collapse margin ratio and the collapse possibilities. The analysis results show that:Y-eccentric braced steel fralnes designed with seismic fortification level 9 has weaker capacity of collapse margin than the level 8 (0. 2g) , and the frame's story is more the capacity of collapse margin of the structure is weaker.
出处
《四川建筑科学研究》
2014年第2期186-191,共6页
Sichuan Building Science
关键词
Y型偏心支撑钢框架
倒塌储备系数
增量动力分析
Y-eccentric braced steel frames
Collapse Margin Ratio (CMR)
incremental Dynamic Analysis (IDA)