Shear Behavior of Self Compacting R.C. I-Beams

Abstract

Twelve SCC I-Beams were designed to investigate the shear behavior under twoconcentrated loads. All beams have the same longitudinal steel ratio of (0.0145) and grosssection area of (29000 mm²). The tested beams were divided into two groups with andwithout stirrups. The first group consist of three beams without stirrup having differentvalues of compressive strength (fc`) but same value of clear span to effective depth ratio(ln/d), while the second group consist of nine beams with stirrups. It shall divided into threeseries according to the compressive strength (fc`) each series continued three beams atdifferent value of clear span to effective depth ratio (ln/d). It was found that The ultimateshear strength predicted from A CI 318-08 is lesser than the experimental values, theultimate shear strength of SCC I-beams increased about 46.728%,46.55%and 41.462%when the clear span to the effective depth (ln/d) decreased from (5.84 to 5.05) atcompressive strength (fc) 29.36, 41.42 and 49.2 MPa respectively, the ultimate shearstrength for SCC I- beams with stirrups increase about 22.536%,15.27% and 10.828% when the compressive strength (f_c) increased from (29.36 to 49.2 MPa) at clear span to effective ratio (ln/d) 5.84, 5.5 and 5.05, respectively.