Study On Interactive Buckling And Post-buckling Of Thin-walled Lipped-channel Beam With Web's Stiffeners

The interactive buckling theory and ANSYA finite element software are adopted to analyze thin-walled lipped-channel beam with or without web's intermediate V-stiffeners. The main content of the study include:1. The interactive buckling computers of veneers with different boundary and loading conditions and thin-walled lipped-channel beam-column are calculated. Furthermore, the numerical computer results are in good agreement with theory and experiment.2. The interactive buckling factor and build-in factor are inducted to think over the influence of flange and lip on thin-walled lipped-channel beam's buckling.The study get the fitted regression equation of thin-walled lipped-channel beam's critical buckling stress.3. Stability factor Mcr/My is presented as an index to estimate the stability of beam with stiffener. And the rigidity ratio and area ratio of stiffener are presented as the parameter to fix a stiffener. The study get the influence curves which the parameter brings to beam's stability. Basing on the curves, the sections of thin-walled lipped-channel beam are class into four grades which can provide theory guidance to a certain extent.4. The paper gets the post-buckling strength of eight thin-walled lipped-channel beam with different stability through dual nonlinear computer.In the end, the limits and shortcomings of the research are summarized. Several suggestions on the future research are presented.