上海某连体高层组合结构的超限分析

Seismic design of a connecting high-rise composite structure in Shanghai

以上海浦东某连体的高层钢框架-剪力墙混合结构为例,分别用2个软件进行了弹性静力分析,对比了整体计算指标,进行了楼板应力分析、弹性时程分析等基本计算。对各分塔指标与连体计算指标进行了对比,此外对大跨空腹桁架连桥、穿层柱、核心筒剪力墙底部加强区等关键部位进行了验算复核,并进行大震动力弹塑性分析来检查各关键构件的塑性发展历程。结果显示在小震下结构基本计算指标能满足要求,分体模型中单塔各阶振型的模态及出现顺序基本与连体模型匹配,两种模型位移指标接近,连体对结构各单塔的动力特性影响不大。在小震、中震、大震条件下大跨连桥、穿层柱及底部核心筒剪力墙等关键部位的承载力性能满足要求,在大震情况下结构局部轻度损坏,结构具有良好的抗震性能。

This article chose a connecting high-rise composite structure in Shanghai,two kinds of software were used to analyze the elastic static index,the performance of the critical parts was verified,especially the long-span connecting bridge and the columns that cut across different floors,and dynamic elastic plastic analysis was done to check the plastic developments of vital parts.The results reveal that the fundamental index can meet the requirements in the codes.The bearing capacities of the vital parts under frequent earthquake,fortification earthquake or rare earthquake can meet the requirements,there occurred slight damages partially under the rare earthquake,the structure performs good bearing conpacity under earthquakes.