(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)

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。

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

中图分类号:TU311. 3 文献标志码:A 文章编号:1002-848X(2022)22-0011-05

DOI:10. 19701 / j. jzjg. ZJ220096

Analysis on key problems of complex high connected structure design

DAI Junping1, WANG Siqing1, CHEN Feng1, LIU Jianwen1, FANG Hui1, GONG Lingli1, YE Junchen2

(1 Hunan Architectural Design Institute Group Co. , Ltd. , Changsha 410012, China;2 Wind Engineering Experimental Research Center, Hunan University, Changsha 410012, China)

Abstract: A steel frame multi-tower building project consists of three steel frame towers and a steel truss high connectedsky hall on the top of the tower, with a maximum connected span of 68. 5m. Firstly, the seismic response of the bearinglayer 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, soas to determine the most adverse seismic direction. Then, through time history analysis, MIDAS Gen 2020 software wasused to analyze the comfort level of sky hall with large structure span and soft stiffness under different excitation combinationconditions. Finally, the elastic-plastic analysis of key joints was carried out by using the finite element method and takingthe internal force envelope value of medium and large earthquake components as boundary conditions. The analysis resultsshow that the comfort level meets the requirements of normal operation, and the key nodes meet the requirements of seismicperformance.

Keywords:high connected structure; large-span structure; most adverse seismic direction; comfort level; edestrian

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

第一作者:戴军平,学士,工程师,主要从事结构工程设计工作,Email:1836043605@ qq. com。

[引用本文] 戴军平,王四清,陈丰,等. 复杂高位连体结构设计关键问题分析[ J]. 建筑结构,2022,52(22):11-15. DAI Junping,WANG Siqing,CHEN Feng,et al. Analysis on key problems of complex high connected structure design[J]. Building Structure,2022,52(22): 11-15.