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基于某会展中心大跨度空间结构工程,采用SAP2000软件对其部分钢屋盖结构进行建模和Pushover分析.研究了采用Pushover分析法对大跨度空间结构进行竖向静力弹塑性分析的适用性,判断了该结构在罕遇地震作用下的塑性铰发展情况,并对结构进行了竖向非线性时程分析以校核Pushover分析结果,根据分析计算结果为工程设计提出了建议.分析结果表明,结构塑性铰分布均发生在外圈桁架腹杆上,屋盖结构自身抗震性能良好,采用Pushover分析法对大跨度空间结构进行抗震性能评估具有较好的适用性和准确性.
Based on the long-span space structure project of an exhibition center, SAP2000 software was used to model and pushover analysis of some steel roof structures.The applicability of Pushover analysis for vertical static elasto-plastic analysis of long-span space structures was studied, The plastic hinge development of the structure under rare earthquakes is judged, and the vertical nonlinear time-history analysis of the structure is carried out to check the Pushover analysis results, and the suggestions for engineering design are put forward according to the analysis and calculation results.The analysis results show that, The structural plastic hinge distribution occurs on the webs of the outer ring trusses, and the roof structure itself has good seismic performance. Pushover analysis method has good applicability and accuracy for seismic performance evaluation of long-span space structures.