通过对16根500 MPa细晶粒钢筋、1根400 MPa及1根600 MPa钢筋作箍筋的混凝土梁在集中荷载作用下的试验,观测不同混凝土强度、不同剪跨比、不同箍筋强度、不同配箍率、不同截面尺寸、不同截面形状等条件下试件的裂缝、挠度、承载力及破坏形态;并将实测值与有关公式的计算值进行比较.试验结果表明,构件的斜截面承载力仍可按现行《混凝土结构设计规范》(GB 50010-2010)的相关公式进行计算,并有足够的安全储备.%Based on the experiments of 16 concrete beams with 500 MPa hot rolled bars of fine grains, 1 with HRB 400 bars and 1 with HRB 600 bars as stirrup under concentrated load. They are observed that the crack, deflection, bearing capacity and failure mode under the different concrete strength, different shear Span ratio, different stirrup strength, different ratio of stirrup, different section size and different section shape. Some comparisons are made between test results and calculated values. The test results show that the formula in code for design of concrete structures (GB 50010-2010) can be used to calculate its shear capacity which have enough safety.
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