贵州省地质资料馆暨地质博物馆超限结构设计

Beyond Code Limits Structural Design of Guizhou Geological archives and Geological museum

贵州省地质资料馆暨地质博物馆,结构高度36m,在顶部两层设置桁架连体结构,并根据建筑立面造型采用伸臂桁架外挑,连体部分跨度33.6m,最大悬挑长度20m。针对结构的不规则性,结构设计合理制定了结构的抗震性能目标,增加周期控制点选择输入地震波对结构进行了罕遇地震下弹塑性时程分析,运用多尺度分析法对各关键节点进行有限元分析,还对结构作了抗连续倒塌分析和大跨大悬挑楼盖区域的楼盖舒适度分析。

The structural height of Guizhou Geological archives and Geological museum is 36 m.The connective trusses are set on the top floors.According to the building shape,the cantilever truss is used for overhanging.The largest span of the connected part is33.6 m,and the maximum cantilever length is 20 m.In view of the irregularity of the structure,the seismic precautionary objective is reasonably set.By increasing the periodic control points,the seismic wave are selected,and the elastic-plastic time history analysis of the structure under rare earthquake is carried out.The finite element analysis of the key nodes is carried out by using the multi-scale analysis method.The anti progressive collapse analysis and the floor comfort analysis of the large-span and large cantilever floor area are also carried out.