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通过对碳纤维增强复合材料(CFRP)加固预损伤钢筋混凝土梁及经海水腐蚀的CFRP加固预损伤钢筋混凝土梁的抗弯性能试验,对比研究了海水侵蚀对试验梁破坏形态、裂缝开展情况、应变发展及抗弯承载力等的影响规律。试验结果表明,采用CFRP对机械损伤钢筋混凝土梁进行加固处理,可以有效地提高其抗弯承载力和刚度,约束裂缝的开展。随着海水腐蚀时间的延长,CFRP加固损伤梁的各方面性能受到明显的影响,但仍具有较为可靠的加固效果,且混凝土应变符合平截面假定的条件。
Through the tests on the flexural strength of pre-damaged RC beams strengthened with carbon fiber reinforced composite (CFRP) pre-damaged reinforced concrete beams and CFRP strengthened with seawater, the effects of seawater erosion on the failure modes, crack development and strain development And flexural capacity such as the impact of law. The test results show that using CFRP to reinforce the mechanically damaged RC beams can effectively improve the flexural capacity, stiffness and restraining cracks. With the prolongation of seawater corrosion time, the performance of CFRP strengthened beam is obviously affected, but it still has more reliable reinforcement effect, and the concrete strain accords with the assumption of flat section.