DYNAMIC RESPONSE ANALYSIS OF AN INDUSTRIAL BUILDING OF HYBRID STRUCTURE UNDER THE ACTION OF EARTHQUAKES
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摘要: 为研究钢-混混合结构工业厂房的地震反应,采用有限元软件SAP 2000对一实际工程案例进行模拟分析,完成了模态分析、反应谱分析、弹性时程分析和弹塑性时程分析。结果表明:该结构的周期比小于0.9;在多遇和罕遇地震作用下,振型分解反应谱和弹性时程分析下的最大弹性层间位移角为1/717,弹塑性时程分析下顶层位移角为1/81,均满足GB 50011—2010《建筑抗震设计规范》中对于弹性和弹塑性层间位移角的规定。结构的位移反应和加速度反应均随地震烈度的增大而增加,瞬时耗能主要集中在加速度峰值段,且罕遇地震下能量耗散远大于多遇地震。Abstract: In order to study seismic responses of industrial workshops with SRC hybrid structure, an actual industrial workshop was simulated and analyzed by the finite element software SAP2000. Through modal analysis, response spectrum analysis, elastic time-history analysis and elastic-plastic time-history analysis, the results showed that the period ratio of the structure was less than 0.9. Under frequent and rare earthquakes, the maximum drift angle of stories by the modal decomposition method for response spectrum and elastic time-history analysis was 1/717, and the peak drift angle of the top floor analyzed by elastoplastic time-history was 1/81, both of which met the requirements of the specification GB 50011-2010 on the drift angles. The displacement responses and acceleration responses of the structure increased with the increase of earthquake intensities, and the instantaneous energy dissipation mainly occured in the peak acceleration periods, and the energy dissipation under rare earthquakes was much higher than that under frequent earthquakes.
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Key words:
- SRC hybrid structure /
- industrial plant /
- seismic response /
- SAP 2000
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