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通过9根高强钢筋活性粉末混凝土梁在两点加载作用下的抗剪性能试验,研究了剪跨比、配箍率以及纵筋配筋率等因素对活性粉末混凝土梁抗剪破坏形态及抗剪承载能力的影响。在桁架模型基础上考虑混凝土拱的作用即采用桁架拱模型对试验梁抗剪承载力进行了计算,对比我国规范GB 50010-2010、美国规范ACI 318-08以及欧洲规范EN 1992-1-1:2004的计算结果,并与试验值进行对比。结果表明:上述规范抗剪承载力计算公式偏于保守,桁架拱模型较其他规范对活性粉末混凝土梁抗剪承载力的计算更为准确。
Through the shear resistance tests of nine high-strength steel reinforced reactive powder concrete beams under two-point loading, the effects of shear span ratio, stirrup ratio and longitudinal reinforcement ratio on the shear failure morphology and shear resistance of reactive powder concrete beams Influence of carrying capacity. Considering the effect of concrete arch on the basis of the truss model, the truss arch model is used to calculate the shear capacity of the test beam. Comparing with the Chinese standard GB 50010-2010, the American standard ACI 318-08 and the European standard EN 1992-1-1: 2004 calculation results, and compared with the test value. The results show that the formula for shear strength of the above specifications is conservative and the truss arch model is more accurate than the other codes in calculating the shear capacity of reactive powder concrete beams.