北京汽车博物馆抗震性能弹塑性分析

Elastic-plastic analysis of Beijing Automobile Museum

北京汽车博物馆为体型复杂的场馆结构,中厅周边柱上下错位,采用型钢混凝土转换节点。基于非线性有限元通用软件,采用纤维梁和分层壳单元,对其整体结构进行了弹塑性静力推覆和动力时程分析。采用精细模型对复杂节点进行弹塑性分析,得到了节点的承载力N-M相关曲线,并据此验证了转换节点的可靠性。分析结果表明,结构在小震及设防烈度地震作用下基本处于弹性状态,在罕遇地震作用下主结构能够保持较好的工作状态。

The structure system of Beijing Automobile Museum is irregular and complicate.The columns surrounding the center hall are stagger between stories,and the steel reinforced concrete composite transferring system is used to strengthen the joints.Based on nonlinear finite element software,using fiber beam element and layered shell element,push-over analysis and elastic-plastic time-history analysis are carried out.Based on refined finite element model,elastic-plastic analysis is made to study the loadbearing capacity of complicate joints,N-M interaction curves are obtained and the reliability of joints is proved.The results show that the structure is elastic under frequent earthquake and inter-mediate earthquake and the main structure has good performance under rare earthquake.