摘要
某体育中心体育场屋盖采用轮辐式索承网格结构形式,由上弦马鞍形刚接单层网格结构、下弦68榀径向索与1道环索及竖向撑杆构成,是典型的半刚性结构。本文利用有限元分析软件ANSYS对屋盖结构系统张拉过程进行了逆向跟踪模拟分析。根据施工张拉方案,拉索索力分四阶段进行加载,每个阶段分四批次张拉,得到每一施工步的拉索索力、结构变形等施工控制参数,为施工过程中索力和竖向位移的监测提供了参考。同时根据胎架反力的变化情况,观察到部分胎架自动脱胎,可制定合理的胎架拆除方案。通过整个屋盖索结构张拉施工全过程数值模拟,验证了结构设计的合理性、施工过程的可行性,结构位形、各体系索力等均达到设计目标,为实际施工提供了理论依据。
The roof of a sports center stadium adopts a spoke-type cable-supported grid structure,which is composed of an upper-string saddle-shaped rigid-connected single-layer grid structure,a lower-string 68 radial cables,a ring cable and vertical braces.It is a typical semi-rigid structure.This paper uses the finite element analysis software ANSYS to carry out a reverse tracking simulation analysis of the roof structure system tension process.According to the construction tensioning plan,the cable force is loaded in four stages,and each stage is tensioned in four batches to obtain the cable force,structural deformation and other construction control parameters for each construction step,which provide a reference for the monitoring of cable force and vertical displacement during the construction process.At the same time,according to the changes in the reaction force of the tire frame,it is observed that part of the tire frame is automatically released,and a reasonable tire frame removal plan can be formulated.Through numerical simulation of the entire roof cable structure tensioning construction process,the rationality of the structure design and the feasibility of the construction process are verified.The structure configuration and the cable force have reached the design goals,providing a theoretical basis for the actual construction.
作者
刘怡吟
张其林
罗晓群
LIU Yiyin;ZHANG Qilin;LUO Xiaoqun(College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期2213-2218,共6页
Building Structure
关键词
体育场
索承网格结构
施工过程
张拉
stadium
cable-supported grid structure
construction process
tensioning
