某商业中心超高层办公楼结构抗震性能分析

Seismic performance analysis of a super high-rise office building in a commercial center

针对某超高层框架-核心筒结构的工程特点及超限不规则问题,运用抗震性能分析,来完成结构的抗震性能化设计。分别运用SATWE与MIDAS/Building软件对结构在多遇地震作用下进行了抗震性能计算分析,研究结果表明:两种软件计算出的结构的周期、基底剪力等各项指标基本保持一致,且满足规范的各项规定。采用MIDAS/Building对结构进行了罕遇地震作用下的动力弹塑性分析,研究了结构的位移、位移角、层剪力的响应以及结构构件在整个过程中的损伤变化情况,结果表明:整体结构及结构构件均满足抗震性能化设计目标。采用MIDAS/Gen对二层局部穿层柱进行屈曲分析,结果表明:结构穿层柱具有较好的承载和变形能力。通过对结构的抗震性能分析,对结构设计中的薄弱位置进行指导并加强,为类似工程提供借鉴依据。

Aiming at the engineering characteristics and irregularities of a super high-rise frame-core tube structure,the seismic performance analysis is used to complete the seismic performance design of the structure.SATWE and MIDAS/Building are respectively used to calculate and analyze the seismic performance of the structure under frequent earthquakes.The research results show that the period,base shear and other indicators calculated by the two software are basically consistent,and meet the requirements of the code.The dynamic elastic-plastic analysis of the structure under rare earthquake is carried out by MIDAS/Building,and the displacement,displacement angle,story shear response of the structure and the damage change of structural components in the whole process are analyzed respectively.The results show that:the overall structure and structural components can meet the design goals of seismic performance.Using MIDAS/Gen to analyze the buckling of the second-floor local cross-layer column,the results show that the structural cross-layer column has better load-bearing and deformation capabilities.Through the analysis of the seismic performance of the structure,the weak locations in the structural design are guided and strengthened,which provides a reference for similar projects.