不规则框架结构在大震下的倒塌概率分析  

Failure Probability Analysis of Irregular Frame Structures under Rare Earthquake

作　　者：程志辉[1] 张震[1] 刘凌菁 Cheng Zhi-hui Zhang Zhen Liu Ling-ring(Architectural Design ＆ Research Institute, South China University of Technology, Guangzhou 510641, China)

机构地区：[1]华南理工大学建筑设计研究院,广东广州510641

出　　处：《工程抗震与加固改造》2017年第1期35-40,共6页Earthquake Resistant Engineering and Retrofitting

摘　　要：从震害实际情况出发,采用柱铰破坏模式研究了在地震作用下几类不规则框架发生层倒塌的失效概率,通过基于位移的模型计算了不规则框架结构大震对于小震的剪力放大系数,然后进一步研究随着地震作用的加大框架发生层倒塌失效概率的变化情况,探讨了通过提高柱端抗弯强度来降低大震时层倒塌失效概率的方法。Considering the actual situation of earthquake,the column hinge failure mode is adopted to study the failure probability on some classes of irregular frame layer collapse under seismic effect,and the shear amplification coefficient of irregular frame structure that rare earthquake relative to frequent earthquake is calculated through the mode based on displacement. Further exploration is made on the change of frame layer collapse＇s failure probability responding to the increase of seismic effect. The method is discussed to lower the failure probability of layer collapse in rare earthquake by improving bending strength of column ends.

关 键 词：不规则框架 柱铰模式 层倒塌 失效概率 剪力放大系数 

分 类 号：TU375.4[建筑科学—结构工程] TU312.3