通过4根加配横向预应力筋的钢筋混凝土梁和1根普通钢筋混凝土梁的对比试验,初步考察了横向预应力筋对提高钢筋混凝土梁抗剪性能的良好效果。研究结果表明:(1)加配横向预应力筋并施加适当预应力之后,钢筋混凝土梁的抗剪承载力提高70%以上,即使在不施加预应力的情况下,梁的抗剪承载力也约有40%的增长;(2)在横向预应力筋的总截面面积一定的情况下,采用直径较小的横向预应力筋和较小的间距,更有助于改善钢筋混凝土梁的破坏形态。 Through the comparison test of four reinforced concrete beams with lateral prestressing tendons and one ordinary reinforced concrete beam, the effect of transverse prestressing tendons on improving the shear resistance of reinforced concrete beams is preliminarily investigated. The results show that: (1) With the addition of transverse prestressing tendons and appropriate prestressing, the shear strength of RC beams is increased by more than 70%. Even without prestress, the shear capacity of the beams is about 40% increase; (2) With the total cross-sectional area of ​​transverse prestress tendons, the use of smaller transverse prestressing tendons and smaller spacing will help to improve the failure mode of RC beams.