Finite element model on mechanical behavior of composite shear wall with double steel plates and infilling concrete

Abstract

The finite element model in MSC. MARC was established based on the experimental results of medium and high shear-span ratio composite shear wall tests. The layered shell model was employed to simulate the double skin shear wall and the foundation beam was modeled to include the strain penetration effect. The finite element model fit well with the test results. The influence of major parameters on the calculation results such as capacity, stiffness and ultimate drift ratio were investigated respectively. The model parameters included the axial compression ratio, the compressive strength of concrete, the yield strength of steel, the steel content ratio and the shear span ratio. The analysis results show that: the axial compression ratio of double steel plates and infill concrete should be restricted under 0.4 for seismic design. Increasing the compressive strength of concrete or yield strength of steel or steel content ratio can increase the ultimate capacity. But increasing the compressive strength of concrete will decrease the ultimate displacement. The lateral stiffness of composite shear wall with double steel plates is mainly contributed by concrete, and is partly influenced by the steel content ratio. Furthermore, increasing the shear span ratio can increase the ultimate drift ratio of shear wall.