西北某高校体育馆大跨钢屋盖结构方案比选与设计  

COMPARISON AND DESIGN OF LARGE-SPAN STEEL ROOF STRUCTURE OF A COLLEGE GYMNASIUM IN NORTHWEST CHINA

作　　者：贺娟娟 HE Juan-juan(Lanzhou Jiaotong University Design and Research Institute Co.,Ltd.,730070,Lanzhou,China)

机构地区：[1]兰州交大设计研究院有限公司,兰州730070

出　　处：《建筑技术》2024年第4期408-411,共4页Architecture Technology

摘　　要：针对西北某高校体育馆钢屋盖结构方案比选,对比分析了两种屋盖方案布置的合理性和用钢量指标。采用3D3S软件对钢结构屋盖进行单独分析与设计,并采用YJK设计软件对比赛场馆上部钢结构与下部混凝土结构进行整体建模分析。最终选用双层(局部3层)正放四角锥螺栓球网架结构体系,支座四周采用3层网架变截面轻盈出挑,以实现建筑造型要求。对关键支座节点采用midas FEA进行了有限元分析验算。结果表明:采用网架变截面悬挑体系能更好地实现建筑造型,节点受力更合理且用钢量更低;支座选用双向抗震球铰钢支座,能有效减小温度应力的不利影响;关键节点采用有限元辅助分析是有必要的。For the selection of the steel roof structure schemes for a college gymnasium in Northwest China,the layout rationality and steel consumption of two roof structure schemes were compared and analyzed.The steel roof structure was analyzed and designed separately with 3D3S software.In addition,the overall modeling analysis was carried out with YJK design software to the upper steel structure and lower concrete structure of the competition venue.Finally,the 2-layer(locally 3-layer) quadrilateral conical bolted spherical mesh-frame structure was selected,and the 3-layer mesh frame is applied around the support for variable-section suspension,to meet the architectural modeling requirements.Key support nodes were subject to finite element analysis and verification with Midas FEA.Results showed:architectural modeling can be better done with the mesh-frame variable-section suspension system,in which the nodes are stressed more reasonably and the steel consumption is lower;The bidirectional seismic ball-hinged steel support used can effectively reduce the adverse effects of temperature stress;and it is necessary to conduct finite element analysis of key nodes.

关 键 词：大跨钢结构屋盖 3层网架 网架变截面悬挑 立体桁架 抗震球铰钢支座 节点有限元分析 

分 类 号：TU393.3[建筑科学—结构工程]