(中衡设计集团股份有限公司， 苏州 215021)

［摘要］金阊新城体育场馆屋盖为大跨度钢结构柱面网架，不同于一般钢网架屋盖，该网架支承于下部三个独立的混凝土框架单体上，支座约束形式、下部结构的平面布置及抗侧刚度对结构的受力状态都有很大的影响。考虑下部结构的影响，对支座刚度进行真实模拟，建立了包含下部结构的总装模型，并比较分析了各工况作用下屋盖单体模型的不同受力状态。结果表明，考虑真实的支座刚度可以有效减小结构在温度作用下的支座反力及结构变形，同时地震响应也有所放大。最后验算了结构在大震作用下的支座位移，选择了合适的支座形式。

［关键词］金阊新城体育场馆； 大跨度柱面网架； 总装模型； 支座刚度； 温度作用； 地震响应

中图分类号：TU318， TU393-3文献标识码：A文章编号：1002-848X(2016)20-0084-05

Structural design for large-span grid roof of Jin Chang New City Gymnasium

Shen Xiaoming, Zhao Baoli, Liu Jing, Wang Chenxu, Zhang Yonghao, Wang Tao

（ARTS Group Co., Ltd., Suzhou 215021, China）

Abstract:The roof of Jin Chang New City Gymnasium is a large-span steel cylindrical grid. Different from normal steel grid roof, this grid is supported above the three independent concrete frames. The restriction form of support, the lateral resistant stiffness and plan layout of the structure below have a big influence on the stress state of the grid. Considering the influence of the lower structure, the real simulation of bearing stiffness was conducted, and the overall assembly model was established containing lower structure. And the different stress states of the roof models under different working conditions were compared and analyzed. The results show that considering the real bearing stiffness can effectively reduce the support reaction force and deformation of the structure under the temperature action, and seismic response was amplified. Finally, the support displacement of the structure under the action of rare earthquake was checked, and the appropriate support form was selected.

Keywords:Jin Chang New City Gymnasium； large-span cylindrical grid; overall assembly model; stiffness of support; temperature action; seismic response

作者简介：沈晓明，一级注册结构工程师，Email：shenxiaoming@artsgroup.cn。