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大连市民健身中心为大跨度悬挑混合结构,即钢管混凝土柱、钢梁+部分混凝土剪力墙结构体系,顶层运动场地面最大悬挑18m,通过交叉桁架与预应力梁实现悬挑部分。网球场上部采用钢骨混凝土预应力结构。采用SAP2000和PMSAP两种程序建立合理的模型,对结构进行基于性能的设计分析。在悬挑桁架端部增设TMD阻尼器,降低振动加速度,满足楼板舒适度要求。采用ABAQUS有限元分析软件,分析悬挑桁架与钢管混凝土柱相交节点应力分布,保证大震弹性。
Dalian citizen fitness center is a large-span cantilevered mixed structure, namely, the concrete-filled steel tube column, the steel beam and the partial concrete shear wall structure system. The maximum cantilevered surface of the top sports ground is 18m and the cantilevered part is realized through the cross truss and the prestressed beam. The upper part of the tennis court uses SRC prestressed structure. Using SAP2000 and PMSAP two procedures to establish a reasonable model, the structure of the performance-based design analysis. Add TMD damper at the end of cantilevered truss to reduce vibration acceleration and meet the requirements of floor comfort. ABAQUS finite element analysis software was used to analyze the stress distribution at the intersection of cantilevered truss and concrete-filled steel tubular column to ensure the flexibility of large earthquakes.