内蒙古伊旗全民健身体育中心索穹顶结构体系设计研究  

Design and research on cable dome structural system of the National Fitness Center in Ejin Horo Banner,Inner Mongolia

作　　者：张国军[1] 葛家琪[1] 王树[1] 张爱林[2] 王文胜[3] 王明珠[1] 许可冉[2] 

机构地区：[1]中国航空规划建设发展有限公司,北京100120 [2]北京工业大学建筑工程学院,北京100124 [3]北京纽曼帝莱蒙膜建筑技术有限公司,北京102601

出　　处：《建筑结构学报》2012年第4期12-22,共11页Journal of Building Structures

基　　金：国家自然科学基金重点项目(51038006);住房和城乡建设部研究开发项目(2009-K2-4);中国航空规划建设发展有限公司资助项目(技10研-19)

摘　　要：内蒙古伊旗全民健身体育中心屋盖结构中部采用索穹顶结构体系,跨度71.2 m,为我国大陆地区首座大跨度索穹顶结构。首先建立结构有限元模型,分析在各设计荷载组合工况作用下索穹顶结构弹性阶段的受力特点,得出不均匀荷载对索穹顶结构更为不利。其次通过对结构体系的动力特性分析,得出索穹顶结构扭转刚度较弱,覆膜可有效地提高索穹顶整体结构的扭转刚度。重点对索穹顶结构体系进行弹塑性全过程分析,分析结构几何参数对结构力学性能的影响,得出索穹顶结构在承载全过程中经历的三个受力阶段:脊索松弛阶段、环索进入弹塑性阶段和结构破坏阶段。提出基于性能的索穹顶结构体系设计方法,并提出各阶段相应的变形性能指标和承载力控制指标。The structural system of cable dome with span of 71.2 m is employed for the roof structure of the National Fitness Center in Ejin Horo Banner,Inner Mongolia.It＇s the first large-span cable dome structure in mainland of our country.Firstly,the whole finite element model of cable dome structure was established and subjected to static analysis under various design and normal load combinations.That the unevenly distributed load was detrimental for cable dome structure was put forward by analyzing the force-bearing characteristics of cable dome structure at elastic stage.Secondly,the conclusions were drawn that the torsional stiffness of cable dome was weak and the membrane can improve the torsional stiffness effectively by analyzing dynamic characteristics.Subsequently,the whole process of elasto-plastic bucking analysis for cable dome system was performed to obtain the three stages in the whole loading process：relaxation of ridge cable,yielding of loop cable and breaking of structure.Meanwhile the influence of geometrical parameters on structural elasto-plastic performance was analyzed.Finally,the design method of cable dome structure based on performance was proposed,the strength and deformation performance and bearing capacity control indexes at each stage were put forward.

关 键 词：索穹顶结构 脊索松弛 环索进入弹塑性 稳定承载力 变形性能 

分 类 号：TU393.3[建筑科学—结构工程] TU394.04