高强箍筋混凝土简支梁抗剪承载力试验研究

Experimental Study on Shear-Bearing Capacity of Simple Supported Beam with High-Strength Stirrup Reinforced Concrete

通过对14根500 MPa细晶粒钢筋、1根400 MPa及1根600 MPa钢筋做箍筋的混凝土简支梁在集中荷载作用下的试验,观测了不同混凝土强度、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了比较.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》的相关公式进行计算,并有足够的安全储备.

Based on the experimental results of simple supported beams, which are hooped by 14 f500 MPa hot rolled fine grain bars and 2 steel bars with the strength of 400 MPa and 600 MPa, under concentrated load, the crack, deflection, bearing capacity and failure mode are observed under the different concrete strength, different shear span ratio, different stirrup strength, different stirrup ratio, different section size. Some comparisons are made between test results and calculated outcome. It shows that the formula in code for design of concrete structures can be used to calculate its shear capacity with enough safety.