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Research on Simplified Method of Seismic Response Analysis Method for Steel Reinforced Concrete Spatial Frames with Special-Shaped Columns
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摘要: 为了简化型钢混凝土异形柱空间框架地震反应分析模型,以双向2跨8层型钢混凝土异形柱空间框架为分析原型,基于OpenSeesNavigator有限元软件平台,建立了双向地震作用下的空间框架、单向地震作用下的空间框架、单向地震作用下的平面框架作为研究对象,其中平面框架通过调整其从属面积宽度达到与空间框架周期相等的目的。对比分析三者在不同地震作用下的加速度反应、位移反应、基底剪力-顶层位移滞回曲线、耗能能力等地震反应验证了简化方法的合理性。结果表明,三者在不同地震作用下的动力反应相似,型钢混凝土异形柱平面框架分析模型经过质量调整后用于替代空间框架进行地震反应分析是可行的。Abstract: In order to simplify the seismic response analysis model of the steel reinforced concrete spatial frame with special-shaped columns, a two-direction two-bay eight-story steel reinforced concrete spatial frame with special-shaped columns was taken as the original analysis model. Based on the finite element software platform of OpenSees Navigator, the spatial frame under bidirectional earthquakes, the spatial frame under unidirectional earthquakes, and the plane frame under unidirectional earthquakes were established as the research objects. In particular, the plane frame had the same period with the spactial frame by adjusting the width of subordinate area. By comparing and analyzing the seismic response of the three models, such as acceleration responses, displacement responses, basement shear versus top displacement hysteresis curve, energy dissipation capacity, et al, the rationality of simplified method was verified. The results showed that the dynamic responses of the three models under different earthquakes were similar, and it was feasible to carry out seismic response analysis by using the steel reinforced concrete plane frame with special-shaped columns after quality adjustment to replace the spatial frame.
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