FINITE ELEMENT SIMULATION ON THE ENTIRE MECHANICAL PERFORMANCE OF T-SHAPED SHORT-LEG CONCRETE SHEAR WALLS UNDER STATIC LOADING FROM ELASTIC TO COLLAPSE STAGES

Finite element analysis model of the T-shaped short-leg shear wall is constructed by using the 3D solid elements package SOLID65 of the general FEA program ANSYS.The simulation covers the whole loading process from the elastic deformation stage to the crack and failure of the concrete.Several factors which may influence the bearing capacity,deformation capacity and ductility of the short-leg shear wall are discussed,such as concrete strength grade, reinforcement ratio,ratio of axial compressive force to axial compressive ultimate capacity of section and ratio of height to sectional thickness of the wallcolumn.The failure process and its cause are analyzed and the response of the short-leg shear wall under the combination loading of the axial compressive force and progressive lateral forces.The simulation results indicate that raising the concrete strength grade and ratio of axial compressive force to axial compressive ultimate capacity of section can increase the loads of crack and yielding as well as the ultimate bearing capacity of the specimen while the deformation capacity and ductility should also be considered.Bearing capacity,deformation capacity and ductility of the shear wall are relatively good when reinforcement ratio is between 1.4% and 1.6%.ratio of height to sectional thickness of the wall-column is an unsteady factor,but deformation capacity and ductility are relatively good when this ratio is between 6.5 and 7.1.