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Abstract:
The lumped plasticity analysis approach is one of the most efficient methods to calculate the nonlinear behavior of reinforced concrete (RC) structures. However, the number of models that can capture shear effects using this approach are limited, and the existing models mostly require iterations or calibration. This study presents three shear hinge models developed based on the Modified Compression Field Theory, applicable to RC beams and columns with various shear span-to-depth ratios. A set of closed-form equations is developed for each model to calculate the shear force and shear deformation of the member at key points of the structural response. The proposed plastic hinge models are verified against various experimental results and finite element models. Moreover, parametric studies are conducted to assess the application range of the models. It is shown that the proposed models can accurately capture the nonlinear response of shear-critical RC structures in a computationally efficient manner.