【摘要】 上虞体育会展区游泳馆屋面钢结构工程采用了单曲倒三角空间桁架,主桁架一端近直角往下转折落于2层混凝土柱顶,竖向段近20 m形成落地桁架柱。柱底三管汇聚至楼面的支座处,导致支座顶板尺寸较大,形成有别于常规支座的异形抗震球型钢支座(固定铰)。主要介绍该结构设计的布置方案和受力特点,以及基于3D3S软件的结构静力分析以及抗震球型钢支座的设计分析、比较优化等,并重点对异形抗震球型钢支座进行了有限元分析。结果表明:当加载至设计荷载时,采用此类节点,可以满足设计要求。更多还原

【Abstract】 The single-curved inverted-triangular space truss structure is adopted for the roof structure of Shangyu swimming center. One end of the main truss is directly rested on the top of the reinforced concrete column with a height of two stories,and the ground truss column is formed on the about 20 meters vertical segment of the main truss. Three pipes at the bottom of the columns are converging to the supports of floor,which leads to a large roof and thus gives rise to the formation of abnormal seismic ball steel supports. The paper focused on the layout and force characteristics of the structural design,by the use of 3 D3 S,the static analysis of the structure,design analysis of the ball steel supports and the optimization analysis were performed,especially including the finite element analysis of the seismic ball steel supports. The analysis results indicated that when loaded to the design loads,the utilization of the connection in the structural design could desirably satisfy the design requirements in the codes.更多还原