The postbuckling behavior of rectangular isotropic stiffened plates under inplane compressive load is investigated considering the phenomenon of buckled pattern change in the postbuckling load range. The finite deformation strains in the von Karman sense are incorporated in the geometrical nonlinear postbuckling analysis. The inplane and out-of-plane displacements are assumed as truncated Fourier series. The principle of minimum potential energy is applied. The total potential energy includes the strain energy due to bending and membrane action of plate, torsion of stiffeners, and the work done by external compressive force. The plates are assumed to be simply supported along the loaded sides and elastically restrained against rotation by longitudinal stiffeners along the unloaded sides. In numerical examples, the postbuckling load end-shortening curves and effective width curves are presented for the rectangular stiffened plates with various aspect ratios, torsional rigidities of stiffeners and inplane boundary conditions along unloaded sides.
Postbuckling behavior of rectangular stiffened plates considering buckled pattern change
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 3 , 4 ; 319-330
1999-12-01
12 pages
Article (Journal)
Electronic Resource
English
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