半刚接钢框架系统刚度的可靠性分析  

Reliability Analysis of System Stiffness of Semi-rigid Steel Frame

作　　者：侯颖[1] 霍达[1] 

机构地区：[1]北京工业大学建工学院,北京100124

出　　处：《郑州大学学报（工学版）》2010年第3期70-72,86,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(50378007)

摘　　要：将梯度优化法与有限元法相结合,探讨了隐式功能函数可靠度算法,通过算例对比分析半刚接与刚接钢框架系统刚度的主要失效模式,同时用PNET法探讨了节点转动刚度和P-Δ二阶效应对结构系统刚度可靠度的影响.结果表明,半刚接与刚接钢框架的系统刚度的主要失效模式基本一致,层间位移较大形成了结构系统刚度的主要失效模式;半刚性连接对结构系统刚度可靠度的影响较大,并且增大了P-Δ二阶效应的影响.Gradient optimization method is combined with finite element method to solve reliability problem with implicit performance function.By giving examples,dominant failure modes of system stiffness of semi-rigid steel frame are analyzed and compared with that of its corresponding rigid frame.The PNET method is adopted to discuss the effect of connection stiffness and P-Δ effect on the reliability of system stiffness of semi-rigid frame.The results show that dominant failure mode of system stiffness of semi-rigid steel frame is the interstorey drift and the same as that of its corresponding rigid frame;the semi-rigid connections have an important effect on the reliability of structural system stiffness and increase the effect of P-Δ effect on system reliability.

关 键 词：半刚性节点 钢框架 系统刚度 可靠性 P-Δ二阶效应 

分 类 号：TU391[建筑科学—结构工程] TU311.2