某网球中心轮辐式张弦梁屋盖结构设计与分析  

Design and analysis on spoke type beam string roof structure of a tennis center

作　　者：陈宇 艾辉军 王四清 夏心红 黄劲 刘祥南 CHEN Yu;AI Huijun;WANG Siqing;XIA Xinhong;HUANG Jin;LIU Xiangnan(Hunan Architectural Design Institute Group Co.,Ltd,Changsha 410012,China)

机构地区：[1]湖南省建筑设计院集团股份有限公司,长沙410012

出　　处：《建筑结构》2024年第18期95-102,共8页Building Structure

基　　金：湖南省科技计划项目:湖南省社会发展领域重点研发项目(2017SK2260)。

摘　　要：某网球中心屋盖由环形雨棚和中央屋盖组成,两者的平面投影为同心的椭圆形,环形雨棚采用钢桁架结构,中央屋盖经过方案比选采用轮辐式张弦梁结构,均上覆半透明PTFE膜。首先对屋盖的风荷载、积雪荷载、温度荷载取值进行了研究,然后在上述基础上对中央屋盖张弦梁拉索的初始预应力值确定、支座形式、整体稳定性、防连续倒塌、关键节点进行了专项分析。结果表明:中央屋盖自重平衡时,长、短轴张弦梁拉索轴力最大分别为745、490kN;中央屋盖采用径向滑动,切向固定铰支座形式较为合理,其中径向允许位移限值为30mm。采用静力失稳模态法引入整体初始几何缺陷,对网球中心中央屋盖进行双非线性稳定性分析,网球中心屋盖稳定承载力系数满足安全要求;采用拆除构件法中的非线性动力方法进行防连续倒塌分析,网球中心屋盖不会因为张弦梁拉索破断而出现连续倒塌;对网球中心屋盖关键节点进行了专项设计和精细的有限元分析,节点安全可靠。The roof of a tennis center is composed of a ring canopy and a central roof,the plane projection of both is concentric oval,the ring canopy adopts steel truss structure,and the central roof adopts spoke type beam string structure after scheme selection,both covered with translucent PTFE film.Firstly,the wind load value,snow load value and temperature load value of the roof were studied.Then,on the basis of the above,the determination of initial prestress value,support form,overall stability,anti continuous collapse and key joints of the central roof beam string structure were analyzed.The results show that when the central roof is under self weight balance,The maximum axial force of the tension cable of beam string structure on the long and short axis is 745kN and 490kN respectively.The central roof adopts radial sliding and the tangential fixed hinge support form is reasonable,and the allowable radial displacement is limited to 30mm.Using the static instability mode method to introduce the whole initial geometric defects,the double nonlinear stability analysis of the central roof of the tennis center was carried out,and the stability bearing capacity coefficient of the tennis center roof meets the safety requirements.Using the nonlinear dynamic method in the dismantling component method for anti continuous collapse analysis,the roof of the tennis center will not collapse continuously due to the breakage of the tension cables of beam string structure.Special design and detailed finite element analysis were carried out on the key joints of the tennis center roof,ensuring the safety and reliability of the joints.

关 键 词：大跨屋盖 轮辐式张弦梁结构 风荷载体型系数 预应力 整体稳定性 防连续倒塌 

分 类 号：TU245.2[建筑科学—建筑设计及理论] TU391