CFRP布NSM加固砼梁的抗弯性能试验研究

Experimental Research on the Flexural Behavior of RC Beams Strengthened by NSM CFRP Sheets

对3根对比梁和8根加固梁进行了试验研究.结果表明,CFRP布NSM加固能有效提高混凝土梁的抗弯承载力。根据混凝土构件中各种材料的应力-应变关系及变形协调原理,提出了考虑二次受力时FRP材料嵌入式加固混凝土构件正截面抗弯极限承载力的计算方法。另外,不同初始弯矩作用下,加固梁的极限承载力几乎相同。

The use of near surface mounted(NSM) FRP is emerging as a promising technology for increasing flexural strength of deficient concrete members.Experimental research on the flexural behavior of 3 reinforced concrete(RC) beams and 8 beams strengthened by NSM CFRP sheets has been carried out.According to the stress-strain relation of every kind of material in the concrete members and the according principle of distortion,a method for calculating the ultimate moment of members strengthened with near-surface moun...