钢板梁面内极限承载力的半解析初应力解法

Semi Analytic Initial Stress Method for Ultimate Carrying Capacity in Web Plane of Plate Girder

根据钢板梁在腹板平面内荷载作用下的工作，拟定板梁弯曲、剪切及腹板面外翘曲位移函数，考虑几何非线性、腹板初始曲度及横向加劲肋的面外弯曲刚度，由势能驻值原理建立板梁的平衡方程，文中计算结果与实测结果接近，得出了一些有关板梁承载能力的结论，与梁的工程设计理论一致。

Based on the works of the plate girder in its web plane,the displacement function of bend and shear and its outer warp are assumed.With the consideration of the geometrical nonlinear,the initial imperfection of the web and the outer stiffness of the lateral stiffener,the balanced equation of the plate girder is set up by using the potential energy variation principle.The experimental results of the tested plate girder agree with those of calculation.Some relative concepts on the carrying capacity of plate girder are obtained,which agree well with the theory of design.