Shear buckling and ultimate capacity of steel plates coupled with cover panels

摘要

The effects of concrete, plaster and polystyrene precast cover panels on the buckling and postbuckling behaviors of slender steel plates subjected to in-plane shear loads are investigated. Precast cover panels are principally used for acoustic and thermal insulation in structural members such as steel plate shear walls. These cover panels, in unison; provide lateral constraints to the buckling induced out-of-plane deformations of plates. Parametric studies on the effects of material and thickness of cover panels on nonlinear behavior of plates under shear loads are performed via finite element simulations. The results show that bilateral cover panels can considerably influence the buckling mode shapes and ultimate loads of slender plates. In addition, cover panels which possess sufficient flexural rigidity, force plates to enter their full plastic state and dissipate their associated maximum energy.