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在综合考虑剪切变形和梁柱节点连接半刚性影响的基础上,给出了框架柱的抗侧移刚度公式。当不考虑剪切变形时对本文给出的公式进行简化可得到相关文献中的公式,但本文给出公式的应用范围更广。数值算例表明:剪切变形对框架结构的P-Δ效应影响显著,与不考虑剪切变形相比,考虑剪切变形的影响所计算的层间侧移的差值已超出工程上可接受的5%的误差范围;剪切变形降低了结构的抗侧移刚度,增大了层间侧移值,应引起高度的重视。本文所编制的计算表格不仅可供工程设计人员用于前期方案阶段的估算,而且可作为对平、立面均规则的钢框架结构电算结果的校核程序使用。
Based on the comprehensive consideration of shear deformation and the semi-rigid connection of beam-column joints, the formulas for the lateral stiffness of frame columns are given. The formula in the literature can be obtained by simplifying the formulas given in this paper when the shear deformation is not considered. However, the application of the formula is more extensive in this paper. Numerical examples show that the shear deformation has a significant effect on the P-Δ effect of the frame structure, and the difference between the calculated lateral displacements considering the effect of shear deformation exceeds the acceptable value Of the error range of 5%; shear deformation reduces the anti-lateral stiffness of the structure, increasing the value of the lateral displacement, should be highly valued. The calculation table prepared in this paper can not only be used by project designers in the estimation of previous stage of project, but also be used as the check-out procedure for calculating the calculation results of the steel frame structure with regular and flat surfaces.