梁—柱及柱脚均为半刚接的钢框架计算分析  

Analysis of steel frames with semi-rigid connections and column bases

作　　者：孙玉萍[1] 冯东海[1] 王万祯[1] 马洪伟[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《四川建筑科学研究》2008年第4期26-29,共4页Sichuan Building Science

基　　金：甘肃省自然科学基金资助项目(3ZS051-A25-044)

摘　　要：针对梁—柱及柱脚均为半刚性连接钢框架进行研究,采用了考虑连接的柔性以及构件的几何非线性影响的非线性分析方法来分析和设计半刚性钢框架,给出了该种钢框架非线性分析需用的3种单元类型:考虑几何非线性的平面框架单元—梁柱单元;考虑梁端节点柔性的平面框架单元—半刚性连接梁单元;考虑底层柱脚柔性和几何非线性的底层柱单元—半刚性柱脚梁柱单元。写出了每种单元的单元刚度矩阵以及叙述了利用经典矩阵位移法进行框架整体分析的程序。引进柱脚半刚性进行钢框架非线性分析,即考虑梁柱、柱脚连接半刚性和几何非线性的整体框架分析,必然会使钢框架受力与实际状态更相符,使结构设计更合理,使框架结构的优化设计更完善、更经济。About the research of steel frames with semi-rigid connections and column bases, a second-order nonlinear analysis is presented which includes the effects of the flexibility of the connections and the geometric nonlinearity of the members. Three types of members are adopted herein： beam-column member; beam member with semi-rigid end connections; beam-column member with semi- rigid column base. The beam-column element stiffness matrix , the semi-rigid beam element stiffness matrix and the semi-rigid column base beam-column element stiffness matrix are given. And a non-linear analysis procedure of steel frame with semi-rigid connections and colmnn bases is talked about to agree with actual appearance of the structure and make the structure design more reasonable. Moreover to make optimum design of steel frame more perfect and more economical.

关 键 词：钢框架 半刚性连接 半刚性柱脚 非线性 刚度矩阵 

分 类 号：TU391[建筑科学—结构工程]