巨型框架结构体系地震响应问题的ANSYS分析

Analyse of ANSYS in seismic response problem system of mega-frame structures

采用大型有限元软件ANSYS对巨型框架结构进行了动力时程分析,讨论了不同主次框架刚度比下巨型框架结构的地震响应,计算结果表明,钢筋混凝土巨型框架在地震作用下的侧移曲线为弯剪型;主次框架刚度比对巨型框架弹性地震反应有较大影响;结构的高阶振型对结构反应有一定影响,当与地震波卓越周期相近时可能发生类共振现象。

Using the ANSYS finite element program, it was analyzed the earthquake resistance to the mega-frame structure. The eseismic responses of mega-frame structure under different frame rigidity are discussed in detail. The calculated results show that the displacement curve of reinforced concrete mega-frame structure is a type of flexure-sheer. The proportion of the major and the minor frame stiffness is an imporrant factor which influence the elastic seismic response of mega-frame structure. The structure higher order frequency has certain influence to the structure, when it is close with the earthquake wave predominant period possibly happen pseudo-resonance phenomenon.