论文部分内容阅读
通过对5根钢丝绳体外预应力抗剪加固的钢筋混凝土梁和2根对比梁的试验,研究了矩形梁体外钢丝绳的竖向布置和斜向布置方式、T形梁体外钢丝绳不同的锚固方式对试验梁抗剪加固效果的影响。结果表明,钢丝绳体外预应力抗剪加固可明显提高加固梁的斜截面开裂荷载、刚度及抗剪承载能力;对于矩形截面梁,闭合U型加固的效果优于斜向布束的加固小效果;对于T梁,就抗剪承载力提高幅度来看,三者相差不大。闭合U型箍布束的加固效果略优于非闭合U型箍布束加固,非闭合U型箍布束(锚固于腹板上)的效果与非闭合U型箍布束(锚固于翼板上)的效果无明显差异。研究结果可供桥梁抗剪加固参考。
Through the test of 5 prestressed shear strength reinforced concrete beams and 2 comparative beams, the vertical arrangement and diagonal arrangement of the steel wire rope outside the rectangular beam are studied. The different anchoring methods of the steel wire rope outside the T-shaped beam are tested Effect of Beam Shear Strengthening. The results show that the prestressed shear reinforcement of wire rope can obviously improve the cracked load, stiffness and shear capacity of the reinforced beam. For the rectangular section beam, the effect of the closed U-shaped reinforcement is better than that of the oblique beam. For the T beam, the increase of shear capacity, the three are similar. The effect of the closed U-shaped hoop bundle is slightly better than that of the non-closed U-shaped hoop bundle reinforcement. The effect of the non-closed U-shaped hoop bundle (anchored to the web) On the effect of no significant difference. The research results are available for the reference of bridge shear reinforcement.