徐  平，张敏霞，丁亚红，王兴国
    (河南理工大学土木工程学院，焦作454003)

[摘要] 为研究内嵌法加固梁的抗弯性能，通过内嵌碳纤维增强塑料(CFRP)筋、螺旋肋钢丝和预应力CFRP筋于加固梁中，共进行了1根未加固梁，9根内嵌不同筋材加固梁的抗弯试验，研究了加固梁的刚度、特征荷载、延性情况。研究表明，加固梁的刚度显著提高；加固梁的承载能力得到明显提高，极限荷载最大提高了149.19%。通过对CFRP筋施加30%极限抗拉强度荷载预应力内嵌于加固中，开裂荷载有明显提高，最大提高15 5.14%，说明内嵌预应力CFRP筋加固法，可以有效的延缓加固梁裂缝的产生。
[关键字] 内嵌法；加固；混凝土梁

Research on flexing resistance of reinfoeced concrete beams strengthened with near surface mounted method
Xu Ping, Zhang Minxia, Ding Yahong, Wang Xingguo
( School of Civil Engineering, He'nan Polytechnic University, Jiaozu0 454003, China)

Abstract: In order to research the flexural behavior of strengthened beams, nine RC beams strengthened with near surface mounted prestressed CFRP tendons, Helix rib Steel Wire and CFRP tendons, and one unstrengthened RC beam were studied by experiments. In these tests, stiffness, characteristic load, and ductility of test specimens were carried out. Experimental results show that the stiffness and ultimate load of strengthened beams rise notably; the maximal ultimate load is increased by 149.19%; the maximal crack load of the beams strengthened with near surface mounted prestressed CFRP tendons applied 30% ultimate stress of CFRP tendons is increased by 155.14%; cracks of strengthened beams can be effectively delayed by near surface mounted prestressed CFRP tendons.
Keywords: near surface mounted method; reinforcement; concrete beam