高烈度区某体育馆大跨弦支穹顶钢结构设计  

Steel structure design of large span suspended dome of the gymnasium in high seismic region

作　　者：刘伟 张正伟 刘涛 黄华桥 LIU Wei;ZHANG Zhengwei;LIU Tao;HUANG Huaqiao(Yunnan Design Institute Group Co.,Ltd.,Kunming 650500,China;Kunming Tie Xin Construction Engineering Management Co.,Ltd.,Kunming 650500,China)

机构地区：[1]云南省设计院集团有限公司,云南昆明650500 [2]昆明铁新建设工程管理有限公司,云南昆明650500

出　　处：《四川建筑科学研究》2020年第5期66-74,共9页Sichuan Building Science

摘　　要：高烈度区某体育馆,下部采用钢筋混凝土框架结构,屋盖采用大跨度预应力弦支穹顶钢结构,雨棚采用悬挑网架。屋盖跨度为74.20 m,矢高为5.12 m,由上弦单层网壳、下弦环索、径向拉杆、竖向撑杆等部分组成。本文对体育馆钢屋盖进行了模态分析,重点考虑了竖向地震效应和温度效应为主的荷载组合,并对屋盖在各种工况下的内力和变形进行了计算。此外,着重分析了屋盖的整体稳定性能,在考虑满跨和半跨荷载2种不同工况作用下,进行了特征值屈曲分析,以及考虑初始缺陷的几何、材料非线性屈曲分析。分析结果表明,屋盖结构体系安全可靠,稳定极限承载力与荷载标准值的比值满足规范要求。A gymnasium in high seismic region is composed of reinforced concrete frame structure below and a large span suspended dome roof upside.Its rainshed uses cantilever lattice structure with a 74.20 meters span and 5.12 meters rise.The steel roof consists of single-layer latticed shell on the top,the bottom hoop cable,radial tension bar and the veritical stay-strut.In design,modal analysis internal force and deformation for the roof is analyzed.In addition,the main load combination of vertical seismic effect and temperature effect is considered.Futhermore,on the basis of the two different working environments of full span and half span load,eigenvatue buckling and nonlinear buckling considering initial flaw are emphatically analyzed.The analysis results show that the structural system of the steel roof is safe and reliable,the ratio of the ultimate bearing capacity and characteristic value of load is comply with the design codes.

关 键 词：大跨钢结构 弦支穹顶 预应力水平 屈曲模态 整体稳定 

分 类 号：TU394[建筑科学—结构工程]