卷边加筋肋约束下正交各向异性板剪切屈曲荷载的近似公式OA

The analytical solution for in-plane shear-loaded orthotropic plates,where two opposite edges are simply supported and the other two are restrained by lipped stiffeners with warping stiffness,is obtained using the Rayleigh-Ritz method and a proper buckled shape function.By introducing generic non-dimensional parameters,i.e.,orthotro-pic material parameters,warping constraint coefficient,and two types of buckling coefficients,the approximate formu-las of the critical shear buckling load of orthotropic plates restrained by lipped stiffeners with warping stiffness are ob-tained by using the curve-fitting technique.The effectiveness and generality of the approximate formulas are validated with the analytical and transformed solutions,and ANSYS numerical analysis.The obtained approximate formulas can be applied to the local buckling analysis of composite beams with edge-stiffened flanges subjected to shear loads.