预应力CFRP布加固T形RC梁正截面承载力分析与计算

Analysis and calculating method of flexural capacity of RC T-beams strengthened with prestressed CFRP sheets

采用碳纤维布施加预应力后加固混凝土梁,可以充分发挥碳纤维材料的高强度特点,显著减小梁的裂缝和挠度,提高加固效率。对预应力CFRP布加固钢筋混凝土T形梁的各种破坏模式、界限和理论计算进行了较系统的分析和总结,并给出了判别破坏模式的方法和计算预应力碳纤维布加固混凝土T形梁正截面的计算公式,计算出的结果与试验结果较吻合。

The high strength of carbon fiber reinforced polymer （CFRP） can be developed effectively by using CFRP sheets in external bonded strengthening of RC beams. The crack width and the deflection of beams with CFRP sheets can be reduced greatly. Failure type, terminal conditions and theoretical calculation of RC T-beams strengthened with prestressed CFRP sheets are more systematic analyzed and summarized. Estimation of failure type and flexural strength calculation methods of RC T-beams strengthened with prestressed CFRP sheets are put forward. The obtained results are in good agreement with the experimental results.