SHEAR STRENGTH OF COMPOSITE STEEL-CONCRETE WALLS WITH VERTICAL RIBS

This study presents shear strength capacity models for composite steel-concrete walls (SC walls) of small aspect ratio which are reinforced by vertical ribs. Arch and truss actions for shear transfer in SC walls are considered after diagonal cracking of concrete. Shear behavior depends on the relative stiffness between steel plates and cracked concrete up to the ultimate state. To determine the yielding point von Mises yield criteria for steel plates and Mohr Coulomb criteria for concrete are adopted. Von Mises yield criteria for an isotropic material is modified for an orthotropic steel plate in this study. Steel plates after yielding are modeled as equivalent reinforcing bars in the direction perpendicular to the diagonal struts at ultimate state. Comparison with experimental data shows good agreement with the theoretical results and numerical analysis.