复杂高位连体结构设计关键问题分析  

Analysis on key problems of complex high connected structure design

作　　者：戴军平 王四清 陈丰 刘建文 方辉 龚灵力 叶俊辰 DAI Junping;WANG Siqing;CHEN Feng;LIU Jianwen;FANG Hui;GONG Lingli;YE Junchen(Hunan Architectural Design Institute Group Co.,Ltd.,Changsha 410012,China;Wind Engineering Experimental Research Center,Hunan University,Changsha 410012,China)

机构地区：[1]湖南省建筑设计院集团股份有限公司,长沙410012 [2]湖南大学风工程试验研究中心,长沙410012

出　　处：《建筑结构》2022年第22期11-15,共5页Building Structure

基　　金：大泽湖海归小镇国际社区配套设施研究(KY03-0000-2022-0011)。

摘　　要：某钢框架多塔建筑项目包含三栋钢框架塔楼以及设置于塔楼顶部的钢桁架高位连体天空之厅,最大连体跨度为68.5m。首先通过多方向试算的方法研究在不同的地震动输入角度下支座层及基底层地震反应,得出结构的不利地震作用效应可能出现在不同的地震动输入方向上,从而确定了最不利地震方向。然后通过时程分析法,采用MIDAS Gen 2020软件对结构跨度大、刚度偏柔的天空之厅在不同激励组合工况下的舒适度进行分析。最后采用有限单元法以中震及大震构件内力包络值作为边界条件对关键节点进行弹塑性分析。分析结果表明,舒适度满足正常使用要求,关键节点满足抗震性能要求。A steel frame multi-tower building project consists of three steel frame towers and a steel truss high connected sky hall on the top of the tower,with a maximum connected span of 68.5m.Firstly,the seismic response of the bearing layer and the substratum under different ground motion input angles was studied by multi-direction trial calculation method,and it is concluded that the adverse seismic effect of the structure may appear in different ground motion input directions,so as to determine the most adverse seismic direction.Then,through time history analysis,MIDAS Gen 2020 software was used to analyze the comfort level of sky hall with large structure span and soft stiffness under different excitation combination conditions.Finally,the elastic-plastic analysis of key joints was carried out by using the finite element method and taking the internal force envelope value of medium and large earthquake components as boundary conditions.The analysis results show that the comfort level meets the requirements of normal operation,and the key nodes meet the requirements of seismic performance.

关 键 词：高位连体结构 大跨度结构 最不利地震方向 舒适度 人行激励 

分 类 号：TU311.3[建筑科学—结构工程]