Abstract
Reinforced concrete beams without stirrup using high-strength concrete of compressive strength f′c ranging from 70MPa to 130MPa were tested. The test results show that for high strength concrete (HSC) beams failed by diagonal tension, the shear strength based on conventional methods is overestimated, and for HSC beams failed by shear compression, the effect of variation of f′c, a/d, effective depth and main steel ratio on these shear strengths can be evaluated by conventional method. In this study, based on test results including other researcher's ones, the equations of shear strength of HSC beams are proposed and safety factors by taking the the uncertainty of proposed equation into consideartion are also given.
