Finite Element Analysis On Shear Performance Of Concrete Composite Walls With Precast Ribbed Panels

This paper conducts a study on the influence factors of shear performance of concrete composite walls with precast ribbed panels which is a kind of new wall formed by precast ribbed panels on both sides and later pouring concrete in the middle. Seven groups of concrete composite walls with precast ribbed panels models and one group of full cast-in-place reinforced concrete shear wall models were designed and simulated by means of finite element analysis software ABAQUS under uniaxial loading. Based on the direction of precast ribbed panels joints, the six groups in front were divided into two cases, one was perpendicular to the loading direction, the other was parallel. The ratio of wall height to width, axial compression ratio, volume ratio of reinforcement, the vertical reinforcement ratio, panel joints form and prestress were considered in the finite element analysis. The direction of precast ribbed panels joints in the seventh group was parallel in one side, and another side kept perpendicular. The eighth group was full cast-in-place reinforced concrete shear wall models. The strength of concrete and reinforcement were the same in all models.The FEA results show that the shear performance of concrete composite walls with precast ribbed panels reduces with the increase of ratio of wall height to width, but increases with the increase of the axial compression ratio. The ductility raises with the increase of ratio of wall height to width and declines with the increase of the axial compression ratio. Increasing the vertical reinforcement ratio in boundary element can improve the sheer performance of the composite walls, but the impacts on initial stiffness are not obvious. By comparing the shear performance and the ductility of the two forms of the wall, it is found that the differences are subtle under the same reinforcement.The FEA results also indicate that the form and direction of precast ribbed panels joints have impact on the sheer performance and stiffness of concrete composite walls with precast ribbed panels, but the influence is not serious. Meanwhile the prestress does not increase the shear performance, but could postpone the crack of the model.The paper initially determines the shear capacity formula of concrete composite walls with precast ribbed panels by comparing the theoretical calculating value with simulations, which is similar with the formula in the Code for Design of Concrete Structures(GB 50010-2010).