不规则复杂平面高层结构抗震计算和设计探讨

对一平面不规则的工程实例采用SATWE程序进行了小震作用下的空间结构振型分解法和弹性时程分析法的计算,采用PUSH程序进行了静力弹塑性分析,并采用EPDA程序进行了中震、大震作用下的弹塑性时程分析。结果表明,对于不规则复杂平面结构,在空间结构振型分解法、弹性时程分析法及静力弹塑性分析计算符合要求的情况下,在中震、大震作用下弹塑性时程分析的弹塑性层间位移角也超出了限值,因此,建议对该类结构补充弹塑性时程分析,并宜采用有害层间位移角来控制结构的层间位移,判断结构的薄弱层。

Seismatic computing and design of irregular and complex plane tall building

Using spacial modal analysis method and elasticity time history method of SATWE program under frequently occurred earthquake,Pushover method of PUSH program,inelastic dynamic analysis of EPDA program under seldomly occurred earthquake,an irregular and complex plane tall building is computed.According to the conclusion,although the computing result accords with the code by spacial modal analysis method,elasticity time history method and Pushover method,the drift angle under fortification earthquake and seldomly occurred earthquake exceeds the code limit.It is suggested that inelastic dynamic analysis is necessary for irregular and complex plane tall buildings,and harmful drift angle should be used for controlling building lateral displacement and judging the weak floor.