上海港温室主楼抗震性能分析

Seismic performance analysis of Winter Garden Building in Shanghai International Transportation Center

上海港温室主楼建筑造型新颖、结构体系独特,使其结构动力特性和地震响应十分复杂。为了给结构抗震设计提供可靠的依据,主要研究了结构的自振特性,并应用有限元数值方法分别对结构在多遇和罕遇地震作用下的动力时程响应进行了分析。同时采用弹塑性静力(推覆)分析方法对结构在罕遇地震作用下的地震响应及推覆过程中塑性铰的分布状态进行了研究。结果表明,结构不存在明显的扭转不规则现象,且满足现行规范提出的各项抗震设防要求和既定的各项抗震性能指标,具有可靠的抗震承载力。

The peculiar building style and the special structural system of Winter Garden Building in Shanghai International Transportation Center induce complicated dynamic behaviour and earthquake responses of the structure.In order to provide reliable data for seismic design,the primary purpose of this paper is to present the earthquake response of the Winter Garden Building.The free vibration behaviour of the Building was studied at first.The response analyses of the structure under frequent and rare earthquakes were then conducted by using elastic finite element method,meanwhile,seismic response and the distribution of plastic hinges of the structure under the rare earthquakes are studied by nonlinear pushover analysis.It is shown that there is no obvious torsional irregularity phenomenon for the Winter Garden Building.The seismic performance of the building meets the certain seismic design requirements of Chinese code and every relevant seismic performance index.The seismic load-carrying capability of the building is also reliable.