An investigation of shear effects in reinforced concrete slabs

Hossein Mosavinejad Ghasamezadeh, Louisiana Tech University


The primary objective of this study was to determine the effect of shear and shear failure mechanisms on a number of one-way reinforced concrete slabs. Several flexure-shear interaction models were considered.

The Russo et al. shear model was utilized to compute a shear reduction factor to account for the effect of shear in each slab. The Park flexural model incorporating Keenan's strain-deformation relationships was employed to obtain the ultimate flexural capacity of slabs. The shear reduction factor was then used to modify the computed ultimate flexural capacity of several experimental slabs from the literature. These slabs were chosen because of their diversity in span-depth ratio, loading patterns, tensile reinforcement, shear reinforcement and compressive strength of concrete.

It was concluded that the incorporation of the shear factor into the flexural model improves the prediction of the experimental ultimate load. It was also learned that the shear reduction factor is more influenced by tensile reinforcement ratio than by the yield strength of reinforcement or compressive strength of concrete.