武汉火车站大跨度枝状支撑空间曲面钢结构卸载分析  

Unloading Analysis of Large-span Dentritic Supporting Space Curved Surface Steel Structure in Wuhan Railway Station

作　　者：王辉 刘曙 吕黄兵 蒋官业 

机构地区：[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

出　　处：《施工技术》2010年第7期4-6,共3页Construction Technology

基　　金：国家科技支撑计划项目--建筑结构高效施工关键技术研究(2006BAJ01B04-05)

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。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 practice prove this unloading scheme is feasible.

关 键 词：武汉火车站 空间曲面 稳定性 卸载 

分 类 号：TU758.15[建筑科学—建筑技术科学]