Bi-axial shear capacity of the tilted solid reinforced concrete beam subject to point loading

Abstract

This paper concerns the biaxial shear capacity of reinforced concrete beams utilizing the “simple test method”. Applying the vertical shear force to the tilted beam. This loading condition simulated the response of the simply supported beams under biaxial shear applied corresponding to two main x and y axes. Three series of reinforced concrete beams have been tested. The main parameters of the present test are the tilting angle of the cross section simulating the ellipse formula of the JSCE recommendation to build reinforced concrete under biaxial shear, the shear reinforcement ratios from zero to 0.00377, 0.00502 and 0.00754, and three of ratios of longitudinal reinforcement were used (0.0276, 0.0426 and 0.0566). The ultimate capacity is discussed separately, based on the design approach using the ellipse interaction model, in terms of concrete contribution and shear reinforcement contribution (JSCE code 2010). By keeping the transverse steel ratio constant, it was found that the increase in the longitudinal ratio of reinforcement between 0.0276, to 0.0566 ‘respectively’ increased the diagonal cracking load (V c) by 22 % and 36.8 % and the ultimate load by 8 and 18 %.