筒偏置框架-核心筒结构的抗震超限分析

Seismic Over-limit Analysis of the Frame-eccentric Corewall Structure

为了探究筒偏置框架-核心筒结构的抗震设计和超限分析,文章基于实际工程单体,建立空间结构模型,依据地震响应分析和弹塑性抗震理论,采用两种计算程序(YJK和PMSAP)进行振型分解反应谱法计算对比,并补充弹性时程法分析比较;同时对结构整体进行静力弹塑性和大震防倒塌分析,对超限关键部位进行中震弹性设计加强。分析表明:当筒偏置框架-核心筒具备较好抗扭刚度时,多种分析方法计算结果吻合良好,通过大震分析充分揭露出结构关键部位,对其设计加强,使得结构具备良好的抗震性能。

To explore seismic design and over-limit analysis of the frame-eccentric corewall structure,3D structural model was built based on actual engineering building in this thesis.According to the seismic response analysis and elastoplastic seismic theory,two programs(YJK and PMSAP)were used for comparing their calculation with the modal decomposition response spectrum method,and further analysis with the elastic time-histories method was replenished.At the same time,the static elastic-plastic analysis of the whole structure and the collapse prevention analysis under rarely earthquake were done,the key parts beyond specification limits were strengthened according to the elastic design under local fortification earthquake.The analysis shows that when the frame-eccentric corewall structure possesses better torsional stiffness,its calculation results of several analysis methods fit very well,besides the rarely earthquake analysis can fully expose the key parts of this structure,and strengthening these key parts to make the structure have good seismic performance.