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基于桁架理论模型,定量考虑锈蚀钢筋力学性能、加固钢板厚度、粘胶层粘结强度、保护层厚度对承载力的影响,建立了RC梁锈蚀锚贴加固后极限承载力的计算公式。通过对9片锚贴钢板加固锈蚀梁、3片锈蚀梁以及3片不锈蚀加固梁的试验研究,验证了理论模型的正确性。试验研究和公式计算表明在锈蚀率接近和保护层厚度相同的情况下,钢板厚度每提高1mm,承载力大小提高15k N~20k N,在锈蚀率大小不同的情况下,锈蚀率增加2%~3%,承载力降低大约10k N。
Based on the truss theoretical model, the influence of the mechanical properties of the corrosion reinforcement, the thickness of the strengthened steel plate, the bond strength of the adhesive layer and the thickness of the protective layer on the bearing capacity were quantitatively considered. The correctness of the theoretical model is verified through the experimental research on the reinforcement of 9 anchored steel plates with rust beams, 3 rust beams and 3 stainless steel reinforced beams. Experimental research and formula calculation show that when the corrosion rate is close to the same thickness of the protective layer, the steel plate thickness increases by 1mm and the bearing capacity increases by 15k N ~ 20k N, the corrosion rate increases by 2% ~ 3%, bearing capacity reduced by about 10kN.