罕遇地震下上海中心超高层的性能化抗震设计

Performancebased Seismic Design of Shanghai Tower Under Rare Earthquake

摘要:

参照CECS160(《建筑工程抗震性态设计通则》)和ASCE41(《American Society of Civil Engineers/SEI 41—06》),研究确定拟建的上海中心超高层建筑结构的性能化抗震设计目标,提出了直接用于该结构的基于材料本构关系的性能化抗震设计方法,以及基于位移的性能化抗震设计控制指标,选取合适的结构单元模型与合适的非线性动力分析技术相结合的方法,对上海中心超高层结构进行整体抗震性能评估.为该结构设计提供了有益的建议,并为基于位移的性能化抗震设计方法积累了资料.

Abstract:

Based on CECS160 and ASCE41,performance design levels and objects of Shanghai Tower are proposed.A computational strategy for dynamic analysis of seismic behavior of the building is put forward,in which the nonlinear stressstrain relationship of structural materials is directly adopted rather than concentrated plastic hinge.The corresponding performancebased seismic design objects of primary members are determined.The suitable finite elements and a reliable nonlinear dynamics analysis technique are selected to accomplish the performance evaluation of Shanghai Tower.Valuable suggestions about the performance seismic design are proposed for the structure.The results provide useful background materials for further study of the performancebased seismic design of similar buildings.