EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF CONCRETE BEAMS REINFORCED BY HOT ROLLED RIBBED BARS OF FINE GRAINS

Hot-rolled ribbed bars of fine grains are a new type of steel bars whose characteristic value of yielding strength is 500 MPa.Based on the test results of 9 concrete beams reinforced by hot-rolled ribbed bars of fine grains under shear,the shear behavior,the shear failure modes and the main factors affecting the shear capacity of the beams are analyzed.The results show that the shear behavior of concrete beams reinforced by the hot-rolled ribbed bars of fine grains are almost the same as the beams reinforced by common low alloy-steel hot-rolled ribbed bars,the shear bearing capacity of the beams can be calculated by the formulas in curent Code for design of concrete structures(GB50010),and the design value of tensile strength of stirrups for the new ribbed steel bars can be taken as fyv = 360 MPa,the calculated results are in safe side.This proposal may be as a reference for the applications of hot rolled ribbed bars of fine grains in projects.