Shear behavior analysis of concrete beams reinforced with 500 MPa stirrups under indirect load

Abstract:

A test of three concrete beams with 500MPa high-strength stirrups under indirect load was performed to analyze the structural behaviors, the development of the diagonal cracks and failure modes under direct and indirect load. Numerical models were established with ABAQUS to study the effect of shear span ratio and stirrup ratio on the shearing capacity of the tested beams. The results show that the shearing capacity of high-strength concrete beams under direct load can be precisely predicted with the ’Code for design of concrete structures’. Moreover, the shearing capacity of the beams under indirect load decreases compared with the beams under direct load due to the variation of the shear span ratio and the stirrup ratio. The detailing requirements of additional transverse reinforcement as the code puts can effectively compensate the shearing capacity reduction of the high-strength stirrups beam under indirect load.