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对某多层普通RC框架结构以及设置屈曲约束支撑的RC框架结构进行了推覆分析和非线性时程分析,以最大层间位移角及残余层间位移角为响应指标,对比分析初次地震作用和后续二次地震作用下的位移反应。结果表明:合理增加屈曲约束耗能支撑可较好改善RC框架结构的抗侧刚度、承载能力与延性;按抗侧刚度比0.5设置BRBs后,RC框架结构的最大层间位移角和残余层间位移角分别最大可降低48%和70%;随着BRBs设置的不断增加并不能有效降低残余变形,反而有增大的可能;二次地震作用的强度对RC框架-屈曲约束支撑结构的最大层间位移角影响较大,对残余层间位移角没有规律性的影响,但增大了残余位移的不确定性。
A general RC frame structure and a RC frame structure with buckling restraint support were analyzed by pushover analysis and nonlinear time history analysis. Based on the responses of the maximum inter-story displacement angle and the residual inter-story displacement angle, the effects of initial seismicity And the displacement reaction under the second earthquake. The results show that with the increase of buckling restraint energy dissipation, the lateral stiffness, bearing capacity and ductility of RC frame structure can be improved well. After setting BRBs with anti-lateral stiffness ratio of 0.5, the maximum inter- And the displacement angle can be reduced by 48% and 70% respectively. With the increase of BRBs, the residual deformation can not be effectively reduced, but may increase. The strength of secondary earthquake strongly affects the maximum layer of RC frame-buckling restraint support structure The displacement angle has a great influence on the displacement angle of the residual layer without regularity, but increases the uncertainty of the residual displacement.