A Contribution to Select the Optimum Equation to Calculate Shear Strength of Self- Compacting Concrete Beams Without Stirrups

Abstract

Interest in recent years has increased in SCC, a new generation of high-performance concrete that can be placed under the influence of its own weight without pressure or the use of vibrators and thus flow smoothly through dense reinforcing steel. In this study we summarized the experimental results of (166) beams in (22) researches about the shear behavior of a self-compacting concrete beams without stirrups. We calculated the nominal shear strength of these beams according to the equations of the normal concrete in six global codes (ACI‑318‑14)، (AAS3600-2009)، (JSCE-2006)، (NZS3101-2006، )EC2-2004)، (BS8110-1997), Then we conducted a statistical study of (performance factor) the ratio of experimental shear force to shear force calculated according to these codes, it was clear that the calculation according to (AAS3600-2009) gave the lowest coefficient of variation (COV=28.46%), While (pf=1.81%), and the coefficient of determination (R = 0.76) did not meet the requirement of (R <0.8), while the calculations according to the British code (BS8110-1997) gave the largest correlation factor between the studied codes (R = 0.86), but (COV=33.69%), and  (pf=23.49%).

We also conducted a statistical study of the results of the calculation of the beams according to the relations proposed in (8) reference studies where the relationship proposed by Bazant and Sun1987 gave the lowest coefficient of variation (COV = 27.03%) and coefficient of determination (R = 0.89), but (pf=68.67%), while the equation proposed by Frosh 2003 gave (COV = 45.33%), (R = 0.71), (pf=1.81%), which is a good ratio