北京当代MOMA结构基于性能的抗震设计及静力弹塑性分析

Performance-based aseismic design and nonlinear static analysis of the MOMA structure in Beijing

为了保证结构的抗震性能,近年来在复杂工程的结构设计中逐渐采用了基于性能的结构抗震设计方法。本文结合北京当代MOMA结构,描述了基于性能的抗震设计方法在结构设计中的具体应用及实施措施,同时采用静力弹塑性方法对结构进行不同方向、不同水准地震作用下的弹塑性反应分析。计算分析结果显示,结构在中震作用下所有柱及剪力墙未发生屈服、悬挑部分钢结构及其支撑柱保持弹性,实现了性能设计提出的性能目标,说明基于性能的抗震设计提高了结构的抗震性能,保证了"大震不倒"的设防目标。

In order to provide better aseismic capacity,performance-based design methodology is adopted for more and more complex structures.This paper describes the performance-based aseismic design methodology and specific measures about one complex building structure named as Beijing MOMA.Nonlinear static analysis was also performed with different load directions and earthquake levels.The results show that the structure meets performance requirements of design,columns and shear-walls,steel members of cantilever and supporting columns below the cantilever are all elastic,which proves that the structure＇s seismic performance is improved with the use of performance-based design methodology and the fortification objective of no-collapse under rare earthquake is guaranteed as well.