摘要
以凯威特型单层球面钢网壳为例,考虑几何非线性和材料非线性,分析了节点刚度不同时网壳结构的极限承载力。定义节点刚度与杆件线刚度的比值为节点相对刚度,定义考虑节点刚度、节点为理想刚接这两种不同情况时的结构极限承载力之比为网壳结构极限承载力折减系数。当杆件最大长细比、跨度、矢跨比等参数分别取不同值时,变化节点相对刚度,考察网壳结构极限承载力折减系数的变化规律。根据参数分析的结果,提出了节点相对刚度不同时网壳结构极限承载力折减系数的简化计算公式。
Taking the single-layer spherical steel latticed shell of Kaiwitt type as an example,considering the geometrical nonlinearity and material nonlinearity,the ultimate bearing capacity of the structure with different joint stiffness was analyzed.The ratio of the joint stiffness to the linear stiffness of the member was defined as the relative stiffness of the joint,and the ratio of the ultimate bearing capacity considering the joint stiffness and the ideal rigid connection was defined as the reduction coefficient of the ultimate bearing capacity of the latticed shell structure.When the maximum slenderness ratio,span and rise-span ratio are taken as different values,the relative stiffness of the joints was changed,and the change rule of the reduction coefficient of the ultimate bearing capacity of the latticed shell structure was investigated.According to the results of parameter analysis,a simplified calculation formula for the reduction coefficient of ultimate bearing capacity of reticulated shell structure with different relative stiffness of joints was proposed.
作者
李志强
LI Zhiqiang(Shanghai Tongzheng Aluminum Structure Building Technology Co.,Ltd.,Shanghai 201106,China;Shanghai Jianke Aluminum Research Institute,Shanghai 201199,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期610-614,共5页
Building Structure
关键词
单层球面钢网壳
几何非线性
材料非线性
节点刚度
极限承载力
single-layer spherical steel reticulated shells
geometric nonlinearity
material nonlinearity
joint stiffness
ultimate bearing capacity
作者简介
李志强,博士,高级工程师,Email:512170218@qq.com。
