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合肥交通银行多功能厅平面呈类椭圆形,2层平台以上屋盖采用大跨度三角钢管桁架结构(跨度40~53m),沿径向均匀设置24榀三角钢管桁架,桁架汇交于中心加强环。针对该工程结构方案的比较、建模分析等关键问题进行探讨,包括主桁架、环桁架、中心加强环等关键构件的计算分析、关键节点的设计与构造。采用将钢屋盖置于混凝土平台的方案,运用应变能阻尼比计算方法实现钢-混组合结构阻尼比的正确计算,同时补充重要支座节点的有限元分析。整体计算结果表明,本工程钢屋盖及支座具有较好的刚度及稳定性。
Hefei Bank of Communications multi-purpose hall flat oval-shaped, two-storey platform above the long-span triangular trussed roof truss structure (span 40 ~ 53m), uniformly arranged along the radial 24 榀 triangular steel trusses, trusses in the center to strengthen the ring . The key issues such as the comparison and modeling analysis of the project structure scheme are discussed, including the calculation and analysis of the key components such as the main truss, the ring truss, the center reinforcement ring and the design and construction of the key nodes. The scheme of placing the steel roof on the concrete platform is adopted. The calculation of the damping ratio of the strain energy and the damping ratio is used to calculate the damping ratio of the steel-concrete composite structure and to supplement the finite element analysis of the important support joints. The overall calculation results show that the steel roof and bearing of the project have good rigidity and stability.