半刚性连接钢框架的二阶弹塑性稳定分析  

Second-order elastic-plastic stability analysis of steel semi-rigid frame

作　　者：苏金凌[1] 李秀梅[1] 秦荣[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004

出　　处：《四川建筑科学研究》2013年第4期29-34,共6页Sichuan Building Science

基　　金：广西教育厅项目(201012MS009);广西大学科研基金资助项目(20090031)

摘　　要：应用转动弹簧及Kish-Chen三参数模型来模拟梁柱的半刚性连接的非线性力学性能,采用梁两端附带零长度转动弹簧的通用半刚性连接梁单元模型,根据梁柱法通过平衡微分方程及稳定函数推导了考虑二阶效应、节点半刚性影响的梁单元刚度方程及单元刚度矩阵,采用塑性铰模型,应用修正的Newton-Raphson迭代法,建立了平面钢框架二阶弹塑性稳定分析的计算格式,最后通过典型算例分析了半刚性连接钢框架的稳定性能。The mechanical properties of semi-rigid connection were simulated by rotational spring and Kish-Chen three-parameter model. A common semi-rigid beam element model with zero-length rotational spring at both ends of the beam was used. Based on the beam-column method, considered second-order effect and semi-rigid connection, the element stiffness equation and matrix were derived by differential equations and stability function. According to modified Newton-Raphson iteration method, the calculation format of steel frames second-order elastic stability analysis was constituted. Finally, through the analysis of a typical steel frame, the impact of semi- rigid connection and second-order effect on the stability were showed.

关 键 词：半刚性连接 钢框架 塑性铰模型 二阶效应 稳定分析 临界力 

分 类 号：TU311[建筑科学—结构工程]