The contribution of the flanges to the shear strength is accounted for by means of an effective shear width, which depends on the section geometry and on the longitudinal reinforcement ratio.
Based on the experimental data that include maximum shear crack width, residual shear crack width, angle of the main crack and shear drift ratio, a simplified equation are proposed to predict the shear deformation of the high-strength reinforced concrete (HSRC) beam member.
The ratio of total shear crack width to maximum shear crack width at the peak deformation angle of a member.
Based on the experimental results in Fig. 11a, the regression equation, Eq. (19), is recommended to describe the relationship between total shear crack width and the maximum shear crack width at the peak deformation angle of the member.
The ratio of the residual total shear crack width to the residual maximum shear crack width.
The ratio of the peak maximum shear crack width to the residual maximum shear crack width.
c Relationship between the maximum shear crack width and the residual maximum shear crack width at the peak deformation of member.
4.3, the ratio of the maximum shear crack width to the residual maximum shear crack width at the peak deformation angle can be estimated using Eq. (21).
Based on the experimental results in Fig. 11b, the regression equation, Eq. (20), is recommended to elucidate the relationship between residual total shear crack width and the residual maximum shear crack width under the residual deformation of a member.
According to previous research (Chiu et al. 2014), the peak maximum shear crack width and the residual maximum shear crack width can be reduced by reducing the stirrup spacing, increasing the stirrup strength, and increasing the tensile reinforcement ratio.
n_{s_Residual} = 0.64 times left( {frac{a}{d}} right) - 1.0 (20) With respect to the ratio of the maximum shear crack width to the residual maximum shear crack width at the peak deformation angle, Fig. 11c demonstrates that n s_Maximum declines as the shear-span to depth ratio increases.
