Evaluation of Current Models for Strength of Bond between NSM FRP and Concrete

Strengthening of reinforced concrete (RC) structures by applying near surface mounted fiber-reinforcedpolymer (NSM FRPP) method is emerging as a new technique for increasing shear and flexuralstrength of them. Since this method is new, few experiments concerning the bond capacity have beendone. So the number of corresponding relationships is limited and their accuracy is not enough. In thisresearch the relationships existing in the open literature were evaluated using the pull-out test results.Amongst them Zhang’s model developed the best performance. The parameters affecting the bondcapacity were also investigated. Finally a linear regression model was developed that had better resultsthan the existing models.

Keywords:

FRP , NSM , pull-out , bond capacity , strengthening , reinforced concrete