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(1 湖南省建筑設(shè)計院集團股份有限公司, 長沙 410012; 2 湖南大學(xué)風(fēng)工程試驗研究中心, 長沙 410012)
摘要: 某鋼框架多塔建筑項目包含三棟鋼框架塔樓以及設(shè)置于塔樓頂部的鋼桁架高位連體天空之廳,最大連體跨度為 68. 5m。 首先通過多方向試算的方法研究在不同的地震動輸入角度下支座層及基底層地震反應(yīng),得出結(jié)構(gòu)的不利地震作用效應(yīng)可能出現(xiàn)在不同的地震動輸入方向上,從而確定了最不利地震方向。 然后通過時程分析法,采用 MIDAS Gen 2020 軟件對結(jié)構(gòu)跨度大、剛度偏柔的天空之廳在不同激勵組合工況下的舒適度進行分析。 最后采用有限單元法以中震及大震構(gòu)件內(nèi)力包絡(luò)值作為邊界條件對關(guān)鍵節(jié)點進行彈塑性分析。 分析結(jié)果表明,舒適度滿足正常使用要求,關(guān)鍵節(jié)點滿足抗震性能要求。
關(guān)鍵詞: 高位連體結(jié)構(gòu); 大跨度結(jié)構(gòu); 最不利地震方向; 舒適度; 人行激勵
中圖分類號:TU311. 3 文獻標志碼:A 文章編號: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
∗大澤湖海歸小鎮(zhèn)國際社區(qū)配套設(shè)施研究(KY03-0000-2022-0011)。
第一作者:戴軍平,學(xué)士,工程師,主要從事結(jié)構(gòu)工程設(shè)計工作,Email:1836043605@ qq. com。
[引用本文] 戴軍平,王四清,陳豐,等. 復(fù)雜高位連體結(jié)構(gòu)設(shè)計關(guān)鍵問題分析[ J]. 建筑結(jié)構(gòu),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.
