This paper investigates the nonlinear behavior of reinforced concrete (RC) shear walls with different parameters such as the slenderness ratio, the concrete strength and the axial force. Web crushing strength and crack angles are investigated with the varying parameters. Failure mechanisms are investigated with the different variables. An analytical model that couples the axial force, shear force, and bending moment is proposed. The concrete constitutive law is based on the recently developed soften membrane model. The shear mechanism is modeled by assuming the strain field of the section as given by the superposition of the classical plane section hypothesis. Transverse strains are internal variables determined by imposing equilibrium between concrete and vertical steel stirrups. Element forces are obtained by performing equilibrium based numerical integration on section axial, flexural, and shear behavior along the length of the wall element. The finite element model was validated through a correlation study with an experimentally tested reinforced concrete walls. These studies resulted in several conclusions regarding the interaction of the different parameters on the global and local behavior of the wall system.
展开▼
