有侧移半刚性连接组合框架柱的稳定分析  

Stability analysis of columns in sway and semi-rigid composite frames

作　　者：王静峰[1,2] 李国强[3] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]清华大学土木工程系,北京100084 [3]同济大学土木工程学院,上海200092

出　　处：《哈尔滨工业大学学报》2009年第4期126-130,共5页Journal of Harbin Institute of Technology

基　　金：国家杰出青年科学基金资助项目(50225825);国家自然科学基金资助项目(50808062);教育部博士点(新教师)基金资助项目(200803591022)

摘　　要：为了研究有侧移半刚性连接组合框架的稳定性能,利用三柱子框架模型,考虑了梁端和柱远端不同约束情况对柱有效长度系数的影响,提出柱有效长度系数的简化方法.通过算例研究了节点的非线性弯矩-转角关系和荷载水平大小对柱有效长度系数的影响,比较了简化方法、Barakat-Chen方法与精确方法的计算结果.研究表明:简化方法比Barakat-Chen方法有更好的精确度,与精确方法计算结果接近.In order to study the stability behaviour of sway and semi-rigid composite frames, a simplified method for determining the effective length factor （μ -factor） of columns is proposed by using the three-column subassemblage model. The effects of non-linear moment-rotation characteristics of connections and load value on the μ -factor are numerically studied by using examples of composite frames. The μ -factors obtained by the present method and Barakat-Chen method are compared with those obtained by the exact method. It is concluded that the present method has good accuracy and can be used in stability analysis and design for sway and semi-rigid composite frames.

关 键 词：有效长度系数 半刚性连接 有侧移 组合框架 稳定分析 

分 类 号：TU398[建筑科学—结构工程]