摘要
考虑几何非线性并采用理想弹塑性本构模型,针对凯威特型网格布置的单层球面铝合金网壳,分析了强轴方向节点刚度不同时网壳结构的非线性稳定性能。铝合金牌号为工程常用的6061-T6,截面形式为工程常用的H形挤压型材。假设弱轴方向节点理想刚接,定义强轴方向节点刚度与杆件线刚度的比值为节点相对刚度并连续变化节点相对刚度,当网壳杆件最大长细比、跨度、矢跨比等参数分别取不同值时,考察铝合金网壳非线性稳定承载力相对于强轴方向节点理想刚接时的下降程度,并总结相关规律。
Considering the geometric nonlinearity and adopting the ideal elastic-plastic constitutive model,the nonlinear stability of single-layer spherical aluminum alloy latticed shell with kewitt grid arrangement is analyzed when the node stiffness in the strong axis direction is different.The grade of aluminum alloy is 6061-T6 commonly used in engineering,and the section form is H-shaped extruded profile commonly used in engineering.Assuming that the weak axis direction node is perfectly rigid,the ratio of the strong axis direction node stiffness and the member line stiffness is defined as the relative stiffness of the node,and the relative stiffness of the node changes continuously.When the maximum slenderness ratio,span,rise-span ratio and other parameters of the reticulated shell are taken as different values,the decline degree of the nonlinear stability bearing capacity of the aluminum alloy reticulated shell relative to the strong axis direction node with ideal rigid connection is investigated,and the results are summarized.
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594-598,共5页
Building Structure
基金
国家自然科学基金重点项目(51738009)
关键词
几何非线性
理想弹塑性
单层球面铝合金网壳
节点刚度
非线性稳定性能
geometric nonlinearity
ideal elastic-plastic model
single-layer spherical aluminum alloy reticulated shells
joint stiffness
nonlinear stability performance
