节点刚度对鞍型网壳稳定性的影响  

THE INFLUENCE OF JOINT STIFFNESS ON THE STABILITY OF HYPERBOLIC PARABOLOID RETICULATED SHELLS WITH INITIAL IMPERFECTION

作　　者：康菊[1] 赵金城[2] 宋振森[2] 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021 [2]上海交通大学土木工程系,上海200240

出　　处：《低温建筑技术》2005年第6期47-49,共3页Low Temperature Architecture Technology

摘　　要：节点刚度是影响网壳稳定性的重要因素之一,为理解其影响规律,应用Ansys的M atrix27单元建立节点刚度单元模型,并考虑初始缺陷的影响,运用非线性有限元全过程分析方法,研究了节点刚度变化对不同缺陷双曲抛物面鞍型网壳稳定性的影响。结果表明:刚度降低,网壳稳定承载力下降;缺陷增大,节点刚度的影响减弱,并给出了一些工程设计的建议。The stiffness of joints is one of the most important factors that affect the stability of reticulated shells. Taking the initial imperfection into account, the finite element model of joints stiffness is presented using finite element program, Ansys and then a numerical analysis is performed on the influence of joint stiffness on the stability of hyperbolic paraboloid reticulated shells through the geometrically nonlinear finite element method. Analysis indicated that joint stiffness affect the load capacity behavior of shells with the change of initial imperfection and some suggestions are made for structural design.

关 键 词：节点刚度 半刚性 缺陷 双曲抛物面 

分 类 号：TU375.4[建筑科学—结构工程]