中文摘要：

考虑连接的半刚性以及构件的几何非线性的影响,采用二阶非线性分析方法对半刚性连接钢框架进行分析,推导考虑轴力和剪切变形影响的刚性梁柱单元刚度矩阵和半刚性梁的单元刚度矩阵,并编制了相应的程序计算钢框架的内力和位移。算例结果表明,考虑连接的半刚性,节点约束程度减弱,钢框架横梁跨中弯矩和柱底弯矩增大,梁端弯矩减小;节点半刚性连接和二阶效应对钢框架受力性能有明显影响。

英文摘要：

A second - order nonlinear analysis was presented for the analysis of a semi - rigid steel frame, which includes the effects of the semi - rigid connections and the geometric nonlinearity of the members. The beam - column element stiffness matrix , which includes the axial forcer and shear displacement effects, and the semi - rigid beam element stiffness matrix were given. The calculation program for the internal force and displacement of steel frame was established. The numerical results demonstrate that the positive moment at the mid - span of beams and column bottom moment are increased and the negative end moment of beams is decreased while the semi -rigid connections and second -order effect in steel frames are taken into consideration. The semi -rigid connections and second -order effect in steel frames influenced the forced performance significantly.