钢纤维钢筋混凝土梁斜截面抗剪能力试验研究

钢纤维钢筋混凝土梁可以不配置抵抗斜截面破坏的横向钢筋。对于不配置横向钢筋的钢纤维钢筋混凝土梁的受力性能,国内外所进行的研究还较少,至今对于其斜截面抗剪能力尚未能提出较为合理的计算方法。因此,本文通过试验和分析,探讨影响钢纤维钢筋混凝土梁斜截面抗剪能力的主要因素,提出其斜截面抗剪能力的计算公式,以供今后编制有关规范或规程参考采用。 1试验简介

Experimental Research on Shear Strength of Steel Fiber Reinforced Concrete Beams

The shear tests of 17 beams (13 steel fiber reinforced concrete beams and 4 ordinary reinforced concrete beams) are carried out. On the basis of test results, the behaviors of steel fiber reinforced concrete beams subjected to predominant shear are investigated, and the parameters affecting its behaviors, such as the volume fraction of the fibers, fiber aspect ratio, shear span to effective depth ratio, and the amount of longitudinal reinforcement, are analyzed. Based on our tests and on the tests by previous investigators, predictive formulas are presented for evaluating the ultimate shear strength of steel fiber reinforced concrete beams.