Analysis of shear resisting actions by means of optimization of strut and tie models taking into account crack patterns

Abstract

The shear resisting actions in reinforced concrete elements without transverse reinforcement is analyzed by means of optimized strut-and-tie models with concrete ties. Biaxial failure criteria are used for uncracked and cracked regions. The stress transfer capacity across cracks is accounted for by including the inclination between the stress field and the crack opening and sliding. An experimental case-study is analyzed. It is shown that that different shear resisting actions can occur in different regions of the beam. The strut-and-tie scheme in the critical region is consistent with the Multi-Action Shear Strength Model (MASM).