半刚性连接钢框架稳定性的刚重比控制方法  

CONTROL METHOD OF STABILITY OF STEEL FRAMES WITH SEMI-RIGID CONNECTIONS BY ITS RATIO OF RIGIDITY-TO-GRAVITY

作　　者：沈蒲生[1] 胡习兵[1] 舒兴平[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程力学》2006年第11期80-84,共5页Engineering Mechanics

摘　　要：通过对构件转角-位移方程的修正,推导了半刚接梁单元线刚度修正系数。用等效水平力方法,推导了结构临界重力荷载,提出了用对结构刚重比的控制来进行半刚接钢框架考虑重力二阶效应的稳定计算方法。算例结果表明:连接的半刚性对结构稳定的影响非常大,在该类型钢框架计算时,必须考虑连接刚度的影响。该方法使用方便,计算结果精度高,便于工程设计。同时还计算分析了连接的初始刚度对结构位移和刚重比的影响。Through revising the equation of rotation-displacement, the revised factor of the line rigidity of beam with semi-rigid connections is derived. The critical gravity load of structure is derived by the equivalent horizontal load method. The calculation method about the stability of steel frames, which considered the effect of the second order of gravity by controlling the rigidity-to-gravity ratio of structures, is presented. The calculation results show that the characteristic of semi-rigid connections greatly influences the stability of steel frames, and these influences need to be considered in this kind of steel frames. Meanwhile, the influences of the initial rigidity of connections on the rigidity-to-gravity ratio and the deflection of structures are analyzed.

关 键 词：半刚性连接钢框架 稳定分析 刚重比 刚度修正系数 二阶效应 

分 类 号：TU391[建筑科学—结构工程]