不同底层柱截面上部异形柱中框架非线性地震反应分析  

Nonlinear Seismic Response Analysis of a Special-shaped Columns Middle Frame with Bottom Different Columns

作　　者：王军芳[1] WANG Jun-fang(School of Civil Engineering,Sanming University,Sanming 365004,China)

机构地区：[1]三明学院建筑工程学院,福建三明365004

出　　处：《宜春学院学报》2018年第6期43-48,共6页Journal of Yichun University

基　　金：福建省中青年教师教育科研基金项目(JA15472);福建省自然科学基金项目(2008J0216)资助

摘　　要：为了解底层大开间时异形柱框架结构的抗震性能,在不同情况下采用ANSYS建立了纯异形柱、异形柱中加设暗柱和底层方柱上部异形柱三种中间榀异形柱框架结构计算模型,分别进行了地震作用下地时程地震反应分析,并探讨了梁柱端的塑性铰应变发展规律。结果表明:底层方柱上部异形柱时框架结构能很好的克服底层薄弱现象且结构抗震性能最好,而仅在异形柱中加设暗柱的异形柱框架,其抗震性能虽优于纯异形柱框架,但却不能有效克服底层薄弱现象,这为异形柱的工程应用提供了理论依据。In order to solve the seismic behavior of the bottom large-bay frame with special-shaped columns,the calculation models of the special-shaped columns middle frame with concealed columns and the special-shaped middle columns frame with bottom square columns and the normal special-shaped columns middle frame are established by ANSYS software,and they are analyzed by time history method under earthquakes,and the development of the plastic hinge on the end of beam and column is discussed. The results show that the special-shaped columns frame with bottom square columns can overcome the weak phenomenon of the bottom,and its seismic performance is the best comparing with the other two frames. However,the seismic performance of the special-shaped columns frame with concealed columns is higher than that of the normal special-shaped columns,but it can not effectively overcome the weak phenomenon of the bottom floor,this provides a theoretical basis for the engineering application of the special-shaped column.

关 键 词：异形柱 方柱 中框架 抗震性能 塑性铰 

分 类 号：TU375.1[建筑科学—结构工程]