贵阳老百货大楼结构动力弹塑性分析

Dynamic elastic-plastic analysis on Gui Yang department store building

研究结构在罕遇地震作用下的损伤情况、变形性能,探寻结构的薄弱部位和薄弱层是动力弹塑性分析的主要目的,弹塑性分析还可以对结构的抗震性能进行综合评估,进而指导结构设计,保证结构安全。本文以某超高层框架-核心筒为例,采用动力弹塑性三维非线性结构分析软件Perform-3D进行罕遇地震作用下的计算,结果表明:在罕遇地震作用下连梁能够迅速进入损伤,作为结构抗震第一道防线,在整个地震过程中保持很好的耗能作用;框架柱受弯均未达到屈服状态,作为二道防线的框架柱具有较好安全储备;剪力墙应变处在弹性阶段,墙体保持基本完好。

The purpose of dynamic elastic-plastic analysis is to study the damage and deformation performance of the structure under the action of rare earthquakes,find the weak parts and weak story,it can also comprehensively evaluate the seismic performance of structures,thereby guiding structural design and ensuring structural safety.Taking a high rise frame-core wall structure as an example,the dynamic elastic-plastic 3D nonlinear structure analysis software Perform-3D was used to study structure under the action of rare earthquake.The results show that:the coupling beam entered into damage rapidly under the action of earthquake,and as the first line of defense against earthquake,the coupling beam kept good energy dissipation during earthquake process;The column has not reached the yield state;as the second line of defense against earthquake,the column has a good safety reserve;The shear wall strain is in the elastic stage,and the shear wall is basically intact.