新型钢空腹夹层预应力双曲抛物面组合扭网壳设计  

Design of a new type of steel vierendeel sandwich prestressed hyperbolic paraboloid composite twisted reticulated shell

作　　者：肖同 马克俭[1,2] 卢亚琴 魏艳辉[1,2] Xiao Tong;Ma Kejian;Luu Yaqin;Wei Yanhui(Space Structures Research Center,Guizhou University,Guiyang 550025,China;Key Laboratory of Structural Engineering of Guizhou Province,Guiyang 550025,China)

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550025 [2]贵州省结构工程重点实验室,贵州贵阳550025

出　　处：《建筑科学》2022年第9期158-166,共9页Building Science

基　　金：贵州省科技计划项目(黔科合基础[2019]1090)。

摘　　要：针对钢空腹夹层预应力双曲抛物面组合扭网壳结构,以湖南省拟建体育馆的钢空腹夹层预应力组合扭网壳屋盖为研究对象。基于通用有限元软件建立数值模型,考虑了竖向荷载、风荷载和地震作用。进行了整体结构的模态分析、局部稳定性分析、地震响应分析。着重分析了预应力组合扭网壳屋盖的内力与变形。研究结果表明:竖向荷载和地震作用对结构影响较大,风荷载可忽略;预应力对结构局部屈曲影响较大,钢索中的预应力过大会降低结构局部稳定性;对于不同矢跨比的扭网壳结构,竖向地震作用下动力稳定性临界荷载大于水平和组合地震作用下动力稳定性临界荷载。研究结论可为该新型结构应用于工程实际提供一定参考。Aiming at the prestressed hyperbolic paraboloid composite twisted reticulated shell structure with steel vierendeel sandwich, the steel vierendeel sandwich prestressed composite twisted reticulated shell roof of the proposed gymnasium in Hunan Province is taken as the research object. The numerical model is established based on the general finite element software, and the vertical load, wind load and earthquake action are considered. The modal analysis, local stability analysis and seismic response analysis of the overall structure are carried out. The internal force and deformation of prestressed composite twisted reticulated shell roof are emphatically analyzed. The results show that the vertical load and seismic action have great influence on the structure, and the wind load can be ignored;the prestress has a great influence on the local buckling of the structure, and the excessive prestress in the steel cable will reduce the local stability of the structure;for twisted reticulated shell structures with different rise span ratio, the critical load of dynamic stability under vertical earthquake is greater than that under horizontal and combined earthquake. The research conclusion can provide some reference for the application of the new structure in engineering practice.

关 键 词：钢空腹夹层板 预应力 扭网壳 模态分析 稳定性分析 地震响应分析 

分 类 号：TU393.3[建筑科学—结构工程]