肋环型球面空腹网壳结构的静力性能分析  

Analysis on static behavior of ribbed-type open web spherical reticulated shell

作　　者：张华刚[1] 马克俭[1] 黄勇[2] 徐向东[1] 

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550003 [2]贵州大学土木建筑工程学院,贵州贵阳550003

出　　处：《空间结构》2009年第2期3-8,15,共7页Spatial Structures

基　　金：贵州省优秀教育人才省长专项资金资助项目(Z063011)

摘　　要：空腹网壳是由平板型空腹网架演化而来的新型曲面空间网格结构,形式多样.为了解其中肋环型球面空腹网壳结构在竖向静载作用下的力学性能,本文采用空间梁单元,在边界上、下弦节点均约束线位移时共计算了22个算例,讨论了矢跨比、网壳厚度、网格圈数等参数对其变形和内力的影响.分析表明,肋环型球面空腹网壳可看作是两个具有相同曲率中心的单层网壳通过竖腹杆连接而共同工作,其矢跨比不宜小于1/6,网壳厚度和网格圈数对结构力学性能的影响较小.本文还进行了这种结构与单层网壳的对比分析,表明其具有良好的技术经济指标.The open web reticulated shell is developed from open web space truss, and the form is manifold. In order to study the static behavior of ribbed-type open web reticulated shell under vertical loads, space beam finite element method is used for 22 structures with fixed translational DOF of boundary nodes. The influence of height-to-span,thickness of shell and circle grid division number on deformation and internal force are discussed. The results show that ribbed-type open web spherical reticulated shell can be treated as two single-layer reticulated shell connected by web member, and its rise-to-span ratio can not less than 1/ 6. The effect of thickness and grid division number on static behavior are small. The comparion of the ribbed-type open web spherical reticulated shell and single-layer reticulated shell shows the ribbed-type reticulated shell has good technical and economic index.

关 键 词：球面空腹网壳结构 肋环型 有限元法 竖向荷载 静力性能 

分 类 号：TU393.3[建筑科学—结构工程]