预应力CFRP加固混凝土梁抗弯承载力分析

碳纤维增强复合材料(CFRP)具有高强、质轻、工艺优和耐腐蚀等优点,在混凝土结构加固领域的应用日趋广泛。本文对预应力碳纤维布加固混凝土梁的受弯承载力进行了初步分析,提出了碳纤维布预应力加固后构件抗弯承载力的计算公式。分析与试验结果表明,与非预应力结构相比,预应力CFRP加固混凝土结构可有效利用碳纤维材料高强度的特性,构件的抗弯承载力和刚度得到进一步提高。

Analysis on flexural bearing capacity of RC beams strengthened by prestressed CFRP

Carbon fiber reinforced polymer(CFRP) is widely used to strengthen concrete structure for its good performances such as high strength,light weight,excellent construction method and high corrosion resistance.In this paper primary analyses and equations are presented for computing the flexural bearing capacity of reinforced concrete(RC) beams using prestressed CFRP.Experimental results and analyses show that,in comparison with the one without prestressing force,prestressed CFRP can farther improve the flexural bearing capacity and rigidity of beams by taking full advantage of high strength of the CFRP.