摘要
计算半刚性连续框架柱的有效长度系数时,必须先确定梁柱连续转动刚度。本文提出了计算无侧移框架梁柱连接转动刚度的简化方法:用梁线理论和弯矩-转角曲线确定切线连接刚度。另外,通过两个算例:门式组合框架和三层两跨组合框架,研究了连接的非线性弯矩-转角特征和荷载水平大小对有效长度系数的影响,比较了本文简化方法、Barakat-Chen简化方法与精确方法计算的有效长度系数。研究表明,本文简化方法具有很好的精确性,可以代替精确方法用于无侧移半刚性连接组合框架的稳定分析和设计。
When the effective length factor of columns for semi-rigid composite frames is calculated, the connection rotation stiffness should be determined firstly. A simple method was proposed to calculate the connection rotation stiffness for non-sway semi-rigid composite frames, using beam line theory and moment rotation curve to determine tangent connection stiffness. Furthermore, using two semi-rigid jointed and non-sway portal and 2-span 3-storey composite frame examples, the effects of non-linear moment rotation characteristics of connections and load value on μ-factor were numerically studied and μ-factors were obtained, and also compared with Baraket-Chen method and the exact method. The results show that.the present simplified method has good accuracy and replaces the exact method to use in stability analysis and design for non-sway semi-rigid composite frames.
出处
《力学季刊》
CSCD
北大核心
2006年第4期628-634,共7页
Chinese Quarterly of Mechanics
基金
国家杰出青年科学基金资助项目(50225825)
关键词
有效长度系数
半刚性连接
无侧移组合框架
连接转动刚度
简化方法
稳定分析
effective length factor
semi-rigid connection
non-sway composite frame
connection rotation stiffness
simplified method
stability analysis
