绍兴市游泳馆异形钢屋盖结构设计

Structural design on irregularly shaped steel roof of Shaoxing Natatorium

绍兴市游泳馆异形钢屋盖采用了管桁架结构,主要受力桁架根据弯矩分布进行了变结构高度设计;在屋盖的落差部位,通过管桁架的分段平滑弯折使弦杆得以贯通;在管桁架应力峰值较大的部位采用了销轴支座,在应力峰值较小的部位采用了带焊接球的平板支座。管桁架结构采用MSTCAD进行设计,采用MIDAS/Gen进行了整体校核以及地震作用分析,采用ANSYS进行了关键支座节点有限元分析以及考虑双重非线性的稳定分析,结果表明现行的设计能够满足设计目标。

Structural system of spatial tube truss is adopted in the irregularly shaped steel roof of Shaoxing Natatorium.The structural height of primary tube truss varies according to moment distribution.The tube truss flexes smoothly to make sure the penetration of chords of tube truss where the roof lifts suddenly.Pin support is applied where the peak stress of the structure is larger.Plate support with weld spherical joint is applied where the peak stress of the structure is smaller.The roof structure was designed with MSTCAD,while the overall structure and its seismic performance were analyzed by MIDAS/Gen.Double nonlinear stability analysis and finite element analysis of key support joints were carried out by ANSYS.Results show that the structure can fulfill the design goal.