BFRP与CFRP加固混凝土梁抗弯性能试验研究

Comparative study on flexural performance of RC beams reinforced with BFRP and CFRP

通过6根BFRP加固梁和3根CFRP加固梁的抗弯性能对比试验,分析了FRP类型、FRP粘贴层数和混凝土强度等级对加固梁抗弯性能的影响。试验结果表明,梁的抗弯承载力和抗弯刚度随FRP强度、FRP粘贴层数及混凝土强度等级的增加而提高,但不成线性关系;U型箍锚固量相同的情况下,CFRP加固梁较BFRP加固梁更容易发生锚固失效;对于加固梁承载力的加固效果,粘贴1层CFRP布优于粘贴1层BFRP布,但劣于粘贴2层BFRP布。

Based on the comparative test on flexural performance for six beams reinforced with BFRP and three beams with CFRP,the influence of FRP types,FRP layers and concrete strength grade on the flexural performance of reinforced beams is analyzed.The test results indicate that the bearing capacity and bending rigidity of the beams increase with the increase of FRP strength,FRP layers and concrete strength grade,exhibiting a non-linear relation.Under the same amount of U-form anchorage,the anchorage failure is more likely to happen to the beams reinforced with CFRP rather than that with BFRP.For the reinforcement effect of the beam pasted with one layer of CFRP sheet is superior to that with one layer of BFRP sheet,but inferior to that with two layers of BFRP sheets.