High Strength Concrete Deep Beam With Opening

Abstract

Through this paper investigation of opening shapein high strength fiber reinforced concrete deep beams without stirrups have been studied to report a comparison between specimens with maximum opening different shape (square, circle) at shear span center in term of load-deflection curve,  pattern of crack and stress- strain curve, this paper investigate which specimen  has better shape than other. This study done by testing nine specimens one of these is control deep beam without opening and steel fiber while the other aretwo group each group has four specimens with different opening shape and steel fiber content (0,0.5,0.75,1)%, the opening were square (0.387dX0.387d) while the circle opening is (0.435d) diameter all opening located at the shear span center and reinforced by (3Ø16mm) at the bottom and (2Ø12mm) at the top and two stirrups to prevent local failure. The results showing that the circle opening shape has good stress distribution around opening and get more strength than square opening. The modeling of specimens in abaqus have good agreement with experimental result.