Bond between reinforcing bars and concrete is a crucial mechanism which affects the overall performances of reinforced concrete members. Alongside traditional steel rebars usually employed in the field of construction, a promising solution for the issue of durability of structures is represented by FRP rebars. Indeed, FRP rebars are quite well-appreciated for their corrosion immunity as well as high tensile strength, low weight and resistance to chemical attacks. The present paper is aimed at investigating bond adherence developed at FRP rebar – concrete interface, by considering all the different parameters which can influence this mechanism. This analysis has been carried out by means of a comprehensive experimental database consisting of more than 800 pull-out tests. The experimental results collected by analysing scientific literature have been useful to examine the effectiveness of bond mechanism related to different kinds of FRP rebars. Given that a standardization for FRP rebars still does not exist and the large heterogeneity of FRP rebars currently available on the market, the present study tries to give a classification in terms of bond performances. The procedure employed consisted of considering the ratio between the maximum stress the FRP rebar was able to transfer the corresponding tensile strength. Thus, FRP rebars were divided into two main groups named, respectively, HB (High Bond) and LB (Low Bond).
Bond behaviour of FRP rebars embedded in concrete
Realfonzo Roberto
Membro del Collaboration Group
;Della Vecchia Maria MilenaMembro del Collaboration Group
;Napoli AnnalisaMembro del Collaboration Group
2026
Abstract
Bond between reinforcing bars and concrete is a crucial mechanism which affects the overall performances of reinforced concrete members. Alongside traditional steel rebars usually employed in the field of construction, a promising solution for the issue of durability of structures is represented by FRP rebars. Indeed, FRP rebars are quite well-appreciated for their corrosion immunity as well as high tensile strength, low weight and resistance to chemical attacks. The present paper is aimed at investigating bond adherence developed at FRP rebar – concrete interface, by considering all the different parameters which can influence this mechanism. This analysis has been carried out by means of a comprehensive experimental database consisting of more than 800 pull-out tests. The experimental results collected by analysing scientific literature have been useful to examine the effectiveness of bond mechanism related to different kinds of FRP rebars. Given that a standardization for FRP rebars still does not exist and the large heterogeneity of FRP rebars currently available on the market, the present study tries to give a classification in terms of bond performances. The procedure employed consisted of considering the ratio between the maximum stress the FRP rebar was able to transfer the corresponding tensile strength. Thus, FRP rebars were divided into two main groups named, respectively, HB (High Bond) and LB (Low Bond).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
