钢空腹夹层预应力组合扭网壳静力性能分析  

Static Performance Analysis of Steel Vierendeel Sandwich Prestressed Composite Torsional Reticulated Shell

作　　者：肖同 马克俭[1,2] 卢亚琴 魏艳辉[1,2] XIAO Tong;MA Kejian;LU 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：《贵州大学学报（自然科学版）》2022年第4期81-86,共6页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科技计划项目(黔科合基础[2018]1038);贵州大学引进人才科研项目(贵大人基合字(2016)16号)。

摘　　要：扭网壳由一条直线两端沿着其对应两条倾斜角不同的直线移动形成。为研究钢空腹夹层预应力组合扭网壳结构的静力性能,基于有限元分析软件建立实际模型和等代模型,分析网格尺寸、空腹夹层板高度对实际模型内力分布的影响,得到在网格尺寸一定时,空腹夹层板高度改变对上、下肋轴力和剪力键轴力、弯矩影响较大;空腹夹层板高度一定时,随着网格尺寸的增加,构件内力均有所增大。在此基础上又对比分析了预应力对两种模型竖向挠度的影响,结果表明施加预应力可以减小结构的竖向挠度,提高扭网壳结构的刚度。The twisted reticulated shell is formed by the movement of both ends of a straight line along its corresponding two straight lines with different inclination angles.In order to study the static performance of steel vierendeel sandwich prestressed composite torsional reticulated shell structure,the actual model and equivalent model are established based on the finite element analysis software.The effects of mesh size and vierendeel sandwich plate height on the internal force distribution of the actual model are analyzed.It is found that when the mesh size is fixed,the change of vierendeel sandwich plate height has a great influence on the axial force of upper and lower ribs,shear key axial force and bending moment;when the height of vierendeel sandwich plate is fixed,the internal force of members increases with the increase of grid size.On this basis,the influence of prestress on the vertical deflection of the two models is compared and analyzed.The results show that the application of prestress can reduce the vertical deflection of the structure and improve the stiffness of torsional reticulated shell structure.

关 键 词：空腹夹层板 预应力 扭网壳 竖向挠度 参数分析 

分 类 号：TU393.3[建筑科学—结构工程]