EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF BEAM WITH C1 00 CONCRETE AND HRBF500 GRADE REBAR

Four beams with C1 00 high-strength concrete and HRBF 500 grade rebar and different stirrup ratio weretested, with the shear-span ratio being kept around 3. The development form of the crack and failure process of beamswere observed. According to the data of the test, the shear capacity of beams was analyzed. At last, the experimentalresults were compared with the calculation values by current code. The testing results indicate that the beams with C1 00 high-strength concrete and HRBF 500 grade rebar could work well and its failure modes were similar to theordinary concrete beam. Improving stirrup ratio appropriately was an effective way to improve the shear bearingcapacity and control the diagonal crack development of beams. When shear-span ratio is 3, the current Chinese codeformula used for beam without web reinforcement is not safe, and used for beam with web reinforcement isconservative.