网架支座约束条件对结构内力的影响分析  

A Brief Analysis of the Internal Forces on the Structure of the Spherical Grid Support

作　　者：郭鹏 GUO Peng(Departement of International Project,SIPPR Engineering Group Co.,Ltd,Zhengzhou 450007,China)

机构地区：[1]机械工业第六设计研究院有限公司国际工程院,河南郑州450007

出　　处：《成组技术与生产现代化》2020年第2期58-62,共5页Group Technology & Production Modernization

摘　　要：以援助某国国民议会大厦项目的穹顶屋盖设计为例,分析了球面网架结构在不同支座约束条件下结构杆件的内力变化情况。结论如下:支座水平刚度(特别是径向刚度)对网架杆件内力的分布规律有较大影响,且杆件内力数值偏差较大;在结构设计时,支座的约束假定要和实际支座的约束条件相符,鉴于支座实际刚度的变量偏差及下部结构支撑变形引起的杆件内力重分配问题,应对结构进行包络设计。This paper combines the dome roof design of a national assembly building project in China,by means of finite element theory simulation analysis,the variation of internal forces of structural members of spherical truss under different support constraints is expounded,and the conclusions are drawn as follows:Horizontal(especially the radial stiffness of bearing)on the rack bar has a great influence on the internal force distribution,influence the internal force distribution of bar and numerical deviation is bigger,bearing the constraints of the assumption that must be consistent and practical support of the chosen node processing mode,want to combine the lower level of the support structure stiffness and deformation of bearing stiffness caused by variable bar internal force redistribution of the adverse factors,not simply adopt a pedestal for structural design of a single train of thought,bar under different constraints must be taken into account comprehensively the corresponding envelope design.

关 键 词：网架 平板压力支座 平板橡胶支座 支座径向刚度 包络设计 

分 类 号：TU3[建筑科学—结构工程]