（清华大学建筑设计研究有限公司，  北京 100084）

［摘要］天水市体育中心由体育场、体育馆、游泳馆、体育学校以及连接场馆的两个室外大平台组成。场馆的看台及下部结构采用钢筋混凝土框架结构，屋面呈“飘带”形空间曲面，将一场两馆的屋盖连成一个整体。介绍了该项目中钢结构运用的分析与设计。体育场罩棚采用双向管桁架钢结构，体育馆、游泳馆屋盖采用局部三层网架结构。由于结构超长，钢结构屋盖设置了温度伸缩缝以及温度伸缩节构造，有效释放了温度应力。各场馆的计算分析都基于钢结构与混凝土结构整体拼装模型。由于项目所在地区为高烈度区，下部框架结构中采用了屈曲约束支撑，对屋盖结构也进行了小震与中震的抗震性能目标分析。考虑到体育场罩棚大型悬挑构件抗风设计，还进行了抗连续倒塌验算，并对关键支座节点进行了实体有限元分析，确保了结构可靠的传力与约束。通过结构分析，该工程的设计满足规范要求。

［关键词］天水体育中心；  管桁架；  网架结构；  温度应力；  屈曲约束支撑；  抗连续倒塌；  钢结构；  支座节点

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)17-0027-07

Steel structural analysis and design of Tianshui Sports Center

LI Ye, ZHANG Tao, TANG Han, LI Xiaoyu, WANG Jun

(Architectural Design and Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China)

Abstract:Tianshui Sports Center is composed of stadium, gymnasium, natatorium, sports school and two outdoor platforms to connect them. The stand and substructure of the stadium are of reinforced concrete frame structure, and the roof features the ribbon-shaped spatial curved surface, connecting the roofs of stadium, gymnasium and natatorium into a whole. The analysis and design of steel structure application in the project were introduced. The two-way pipe truss steel structure was used for the canopy of stadium, and the local three-layer grid structure was used for the roof of gymnasium and natatorium. Due to the super long structure, the steel roof was equipped with temperature expansion joint and temperature expansion joint structure, which effectively released the temperature stress. The calculation and analysis of each stadium were based on the integral assembly model of steel structure and concrete structure. Because the project was located in a high seismic fortification intensity area, buckling restrained  brace was used in the lower frame structure, and the seismic performance target analysis of the roof structure under frequent and fortification earthquakes was also carried out. Considering the wind resistance design of the large cantilever components of the stadium canopy, the progressive collapse resistance checking calculation was carried out, and the solid finite element analysis of the key bearing nodes was carried out to ensure the reliable force transmission and constraint of the structure. Through structural analysis, the design of the project met the requirements of the code.

Keywords:Tianshui Sports Center; pipe truss; spatial truss; grid structure; temperature stress; buckling restrained brace; progressive collapse resistance; steel structure; bearing joint

作者简介：李烨，硕士，工程师，Email: liye@thad.com.cn。