MODELING OF NONLINEAR BEHAVIOR OF RC SHEAR WALLS UNDER COMBINED AXIAL, SHEAR AND FLEXURAL LOADING

Predicting the behavior of RC shear walls under bending moment without existence of interaction of any other kind of loadings like shear or axial load is simple and can be conducted with good accuracy. But what is a great concern, is predicting their behavior under the interaction of shear, axial and flexural loadings. In this research, there is an effort to investigate the behavior of RC shear walls under this condition of loading with a novel approach. A general but simple macro model is proposed that can include flexural and shear behavior of the wall by considering the effects of pull put and slippage of reinforcing bars as well as concrete tension softening, stiffening and confinement. This simple model is applicable to different wall shapes with different reinforcement ratios and its prediction has good agreement with experimental results. The predicted behavior of the walls is compared with some available experimental results to show the accuracy of the proposed method.

Keywords:

RC shear wall , behavior , nonlinear analysis , P-M-V interaction , modeling