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为揭示预应力碳纤维布加固钢筋混凝土梁的弯曲变形规律,将层合理论应用到预应力碳纤维布加固的钢筋混凝土梁的结构分析中,建立了集中荷载作用下梁内任意点的挠度、应变及层间应力等计算公式,并对预应力碳纤维布加固的钢筋混凝土梁的力学性能进行了相应的计算;同时利用基于该理论所建立的公式解释了碳纤维布与混凝土的剥离、碳纤维布断裂以及混凝土压碎等试验现象的发生过程。结果表明:计算结果与试验结果相吻合,说明采用该理论分析碳纤维布加固的钢筋混凝土梁是正确的。研究结果为预应力碳纤维布加固混凝土结构的分析提供了新的途径。
In order to reveal the bending deformation of prestressed carbon fiber reinforced plastic (CFRP) beams, the layered theory was applied to the structural analysis of RC beams strengthened with prestressed CFRP sheets. The deflection, strain, Layer stress and other calculation formulas, and the mechanical properties of reinforced concrete beams reinforced with prestressed carbon fiber reinforced fabrics are calculated accordingly. Meanwhile, based on the established formula to explain the carbon fiber cloth and concrete stripping, carbon fiber cloth fracture and concrete Crushing and other phenomena occurred during the test. The results show that the calculated results agree well with the experimental results, which shows that it is correct to use this theory to analyze RC beams strengthened with CFRP sheets. The results provide a new approach for the analysis of concrete structures reinforced with prestressed carbon fiber sheets.