Strength and Ductility of Reinforced High Strength Concrete Beams

Abstract

Complete stress-strain curves for different concrete strengths up to 920 ㎏/㎠ were measured, and the coefficients of stress block were calculated. Meanwhile, a total number of 1 14 reinforced concrete beams, made with normal or high strength concrete, were tested in shear and flexure. It is shown that though high strength concrete is less ductile than normal strength concrete, reinforced concrete beams made with high strength concrete can show more ductility than might be expected from the ductility of concrete itself. Also, the influences of different factors such as shear span to depth ratio, reinforcement ratio and cross-section on the strength of singly reinforced high strength concrete beams are discussed.