施工技术 2010年7月 CONSTRUCTION TECHNOLOGY 第39卷第7期 武汉火车站大跨度枝状支撑空间曲 面钢结构卸载分析 王辉1，刘曙2，吕黄兵2，蒋官业2 (1.中建三局建设工程股份有限公司总承包公司，湖北武汉430064；2.中建钢构有限公司，广东深圳518040) [摘要]武汉火车站钢结构中央站房首次卸载区间（两个主拱支撑，主拱最大跨度116m 间距64.5m)网壳主体结 构安装完毕，通过下调螺旋式千斤顶的回程拆除临时支撑体系，主体结构将从设有临时支撑体系的施工受力状态 逐渐转化为设计受力状态.必须确定合理的卸载次序、卸载量，保持千斤顶的同步性才能保证网壳安全.考虑网 壳主体结构和临时支撑体系的相互作用及主体结构的稳定性，通过有限元模拟计算分析和施工实践，证明该卸载 方案是可行的. [关键词]武汉火车站：空间曲面；稳定性；卸藏 [中图分类号]TU758.15 [文献标识码]A[文章编号]1002-8498(2010)07-0004-03 Unloading Analysis of Large-span Dentritic Supporting Space Curved Surface Steel Structure in Wuhan Railway Station Wang Hui' Liu Shu2 LūHuangbing2 Jiang Guanye2 (1.General Contraction Company of CCTEB Wuhan Hubei 430064 China; 2.China Construction Steel Structure Co.Ltd.Shenzhen Guangdong 518040 China) Abstract:When the lattice shell structure in the first unloading area in steel structure center building of Wuhan Railway Station which is two main arch support with the maximum span of 116m and distance of 64.5m is finished to be installed the temporary support system is demolished by down adjusting the return of screw jack.So the main body structure will transfer forced state from construction to design. Rational unloading sequence and unloading value must be determined to keep the jack's synchronization to assure the lattice shell safety.By considering mutual action of the main body structure and temporary support system of the shell and stability of the main body finite element method simulation analysis is done.The analysis and construction pr...
武汉火车站大跨度枝状支撑空间曲面钢结构卸载分析.pdf
