偏心结构地震反应求解剪力-扭矩“三状态空间模型”

Shear-touque 3-state-space model of seismic response analysis for asymmetric structures

为了解决在工程设计中遇到的偏心结构地震的求解问题,在已有研究的基础上,基于理想弹塑性模型的剪力-扭矩等效屈服面的建立,进一步发展了基于双线性模型的描述偏心结构地震反应性态的“三状态空间”(对应于结构完好的弹性空间、对应于结构发生一定程度破坏的弹塑性空间和结构丧失承载能力的失效空间)模型。与单层RC偏心结构的地震模拟试验结果对比发现,该模型可以更为合理的描述结构的非线性地震反应性态,为钢砼偏心结构的性态抗震设计提供了一个直观的概念性方法。

In order to resolve the solving problem of the asymmetric structures seismic in the engineering design, based on the author＇s previous study on the establishment of the equivalent yielding shear-torque （EYST） surface, this paper develops a ‘3-state-space＇ model for the estimation of the seismic performance of asymmetric structural system based on the assumption of the hi-linear force-displacement relationship and the displacement-based element stiffness determination, which shows high consistency with the experimental results of shaking table tests for single story asymmetric RC structures. This model makes it easy to explain the lateral-torsional coupling effects of asymmetric RC structures under earthquake excitation.