半刚性连接无侧移组合框架梁挠度的简化计算

Simple Calculation of Serviceability Deflections of Continuous Beams for Composite Frames with Semi-rigid Connections

采用近似的线性节点刚度来反映连接的非线性弯矩-转角关系,提出了正常使用极限状态下半刚性连接无侧移组合框架梁挠度的简化计算方法。分析常用的几种线性节点刚度对组合框架挠度的影响,给出了可应用于实际设计的合理的线性割线刚度模型。通过与有限元方法计算结果比较,表明建议的简化方法具有可接受的精确度,而且对节点特征的线性简化不太敏感。

A relativity simple method for calculating the deflections of beams in non-sway composite frames provided with semirigid beam-to-column connections is developed. It approximates the true nonlinear connection moment-rotation relation with simplified linear connection stiffness. The effect of several simplified linear connection stiffness on the composite frames is studied and reasonable linear connection secant stiffness is suggested. Comparisons with deflection from finite element method show the proposed method is of acceptable accuracy and is comparability insensitive to the exact simplifications made concerning connection characteristics.