摘要
混杂纤维(由聚丙烯和聚乙烯组成)具有耐腐蚀、耐碱性、密度低、不连续结构、易于使用等特点,它能大幅提高混凝土的力学性能和耐久性,降低开裂风险。主要研究了混杂纤维在不同箍筋间距下,对混凝土梁抗剪性能的影响,结果表明,混杂纤维能显著提高混凝土梁的极限抗剪强度、延性、刚度和韧度,大幅降低混凝土梁的开裂裂缝宽度,但其有效性会随着箍筋间距的减小而减小。
The hybrid fibers （ composed of polypropylene and polyethylene） has the characteristics of corrosion resist-ance ,alkali resistance, low density, discontinuous structure and easy to use. It can greatly improve the mechanical properties and durability of concrete and reduce the risk of cracking. In this paper, the effects of hybrid fibers on the shear strength of reinforced concrete beams under different stirrup spacing have been studied, the results have shown that the hybrid fiber could improve the ultimate shear strength, ductility, stiffness and toughness of the reinforced con-crete beam significantly, and reduce the width of shear cracks in the reinforced concrete beam drastically, but the effec-tiveness will decrease following the decreases of stirrups spacing.
出处
《广东公路交通》
2017年第4期132-137,共6页
Guangdong Highway Communications
关键词
混杂纤维
混凝土梁
抗剪强度
hybrid fibers
reinforced concrete beams
shear strength
