Abstract
Formulas used to predict shear strength of reinforced concrete in different standards do not always correspond to each other due to the complexity of the shear transfer mechanism. Currently there is no generally accepted method of shear strength pridiction, however, traditionally, shear strength anticipation of a structural concrete elements is performed differently on members with or without shear reinforcement. These empirical approches tend to predict the shear strength too conservatively; alternatively, shear strength of concrete can be easily predicted by Mohr-Coulomb theory. In case of high-axial load and low shear reinforcement, the strength is likely to be determined by the concrete's shear crack. Therefore, a method to predict the strength of concrete with Mohr-circle has been proposed but the circles crossed the boundary and could not evaluate the strength correctly. Mohr circle can be used for prediction of diagonal tension failure strength but the circle cannot be evaluated. In this paper, Mohr circles were investigated considering all steps of cyclic loading until shear crack occurred. It also investigates a correlation between shear strength and normal strength through recognition of the Mohr-Coulomb failure criteria for each specimen.
Highlights
Formulas used to predict shear strength of reinforced concrete in different standards do not always correspond to each other’s prediction due to the complexity of the shear transfer mechanism
There is no generally accepted method of shear strength prediction; traditionally, shear strength anticipation and checking of structural concrete elements is performed differently on members according to the shear reinforcement
As a solution for that issue, Muttoni [5] and Zhang [6] have investigated the shear strength of reinforced concrete members without stirrups based on a critical shear crack
Summary
Formulas used to predict shear strength of reinforced concrete in different standards do not always correspond to each other’s prediction due to the complexity of the shear transfer mechanism. There is no generally accepted method of shear strength prediction; traditionally, shear strength anticipation and checking of structural concrete elements is performed differently on members according to the shear reinforcement. As a solution for that issue, Muttoni [5] and Zhang [6] have investigated the shear strength of reinforced concrete members without stirrups based on a critical shear crack. A method is desired for the prediction of shear strength to have applicability over all conditions based on rational shear failure mechanism. In this paper it is attempted to address correlation between shear and normal strength based on recent improvements of shear strength prediction by MohrCoulomb theory to investigate the shear failure mechanism of reinforced concrete members
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