(1上海原构设计咨询有限公司， 上海 200233； 2 中国建筑上海设计研究院有限公司， 上海 200062)

［摘要］固原体育场整体为单侧椭圆形，立面为马鞍形，长轴方向长约为240m，短轴方向长约为45m，下部为局部4层混凝土框架结构，上部结构采用桅杆柱悬臂桁架结构。分别对罩棚悬挑桁架的结构选型、斜拉索角度等进行探讨，确定其合理的结构布置形式及结构相关参数。对屋盖进行风洞试验数值模拟分析，给出本项目最不利风向下的风荷载体型系数和风振响应因子。针对本项目结构超长的特点，对结构整体进行超长结构应力分析和设计。采用SAP2000软件对在不同荷载组合作用下考虑拉索单元非线性影响进行结构整体抗震分析、悬挑桁架挠度及应力、屋盖整体稳定性及关键节点应力分析。分析结果表明：1.0恒载+1.0风吸和1.0恒载+1.0风压+0.7雪载工况为位移控制工况； 竖向地震组合工况并非杆件应力控制工况，风荷载工况为杆件应力主控工况。屋盖整体稳定性分析表明：桁架的屈曲稳定系数大于5.0，结构整体稳定性能良好。关键节点应力分析结果表明：杆件应力均低于材料的设计应力值，满足规范要求。研究成果可对桅杆柱斜拉悬臂桁架罩棚结构设计提供借鉴。

［关键词］固原体育场； 悬挑钢桁架； 桅杆柱； 拉索； 超长混凝土结构； 温度应力； 风洞试验数值模拟； 抗震分析

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)23-0001-07

Structural design of Guyuan Stadium

WANG Xiaohui1, ZHAO Yanlu2

(1 Yuangou Architects & Consultants, Shanghai 200233, China;2 China Architecture Shanghai Design Research Institute Co., Ltd., Shanghai 200062, China)

Abstract:Guyuan Stadium is a single-sided ellipse with a saddle-shaped fa-ade, the length of its long axis is about 240m and the length of its short axis is about 45m, and the lower part of it is a partial 4-story concrete frame structure and the upper structure adopts the mast column cable-stayed cantilever truss structure. The selection of the cantilevered truss structure of the canopy and the angle of the stay cables were discussed, and its reasonable structure layout and structural related parameters were determined. The wind tunnel test numerical simulation analysis of the roof was carried out and the wind load shape coefficient and wind vibration response factor under the most unfavorable wind direction for this project were given. In view of the super-long structure of this project, the stress analysis of super-long structure and design were carried out for the whole structure. The overall seismic analysis of the structure, the deflection and stress of the cantilever truss, the overall stability of the roof and the stress analysis of key joints were mainly done by using SAP2000 considering the nonlinear effects of cable elements under different load combinations. The analysis results show that 1.0 dead load+1.0 wind suction and 1.0 dead load+1.0 wind pressure+0.7 snow load conditions are displacement control conditions; vertical seismic combined conditions are not stress control conditions of members, and the wind load conditions are stress control conditions of members. The overall stability analysis of the roof shows that the buckling stability coefficient of the truss is greater than 5.0, and the overall stability of the structure is favorable. The stress analysis results of key joints show that the stresses of the members are lower than the design stress values of the materials, which meets the specification requirements. The research results can provide reference for the canopy structural design of the mast column cable-stayed cantilever truss.

Keywords:Guyuan Stadium; cantilever steel truss; mast column; cable; super-long concrete structure; temperature stress; wind tunnel test numerical simulation; seismic analysis.

作者简介：王晓辉，硕士，高级工程师，一级注册结构工程师，Email:wangxh@yuangou.design。