Cyclic Shear Transfer Model for Smeared-Crack RC Membrane Elements

摘要

This research tocuses on new shear transfer model tor reintorced concrete membrane elements. The formulation is based on the recent work on aggregate interlock carried out at University of Toronto. The model is further adapted for displacement-based smeared-crack analysis based on a fixed-crack approach. The proposed model fully couples axial-shear responses of the crack, providing accurate descriptions of the crack dilatancy process due to aggregate overriding under cyclic shear. An important aspect is the definition of the aggregate contact surface, which is used as a criteria to determine when the axial-shear coupled model has to be applied. The formulation is implemented into a four-node isoparametric finite element and validated against uniaxially reinforced panels under cyclic and reversed cyclic tension-shear loading.