某体育场大跨拱形雨蓬加固改造设计与分析

Design and analysis of reinforcement and renovation of a large⁃span arch canopy in a stadium

合肥一中体育场雨蓬为改造项目,在不破坏原有看台结构的基础上,新建跨度为160m的拱形雨蓬来实现建筑的功能。此工程采用大跨钢管拱桁架结构形式,主拱跨度为128m,属于跨度超限结构。通过数值模拟风洞试验,得到了此结构的体型系数和风振系数,并和相关规范及文献进行对比,获取合适的风荷载参数对结构进行分析。采用3D3S、MIDAS Gen等软件对结构进行了静力和变形计算、抗震性能分析、稳定性分析、抗连续倒塌性能分析、支座位移分析等。采用ANSYS软件对结构的关键节点进行了有限元分析,并在重要部位及薄弱区域进行了构造加强措施。结果表明,该结构的承载力和变形均满足相关规范要求,节点可以满足承载力要求。

The canopy of stadium of Hefei No.1 High School is a renovation project.On the basis of not destroying the original stand structure,the new arch canopy with a span of 160m can realize the function of the building.This engineering project adopts the form of large-span steel pipe arch truss structure,the main arch span is 128m,which belongs to the span overrun structure.The wind tunnel test through numerical simulation was used in this project,and the shape coefficients and wind vibration coefficients of structure were obtained.The appropriate wind load parameters were obtained by relevant codes,literature and test result,which used to analyze the structure.The static and deformation calculation,seismic performance analysis,stability analysis,progressive collapse resistance analysis and support displacement analysis of the structure were carried out by using 3D3S,MIDAS Gen and other software.The finite element analyses of the key nodes of structure were calculated by ANSYS software.And the strengthening measures were carried out in important components and weak areas.The results show that the bearing capacity and deformation of the structural meet the requirements of relevant codes,the nodes can meet the bearing capacity requirements.