Inverse identification of a bearing-stress-interface-slip relationship in mechanically fastened FRP laminates

A 1D finite element model for the flexural behaviour of RC beams strengthened with MF-FRP strips

“…Then, an inverse identification procedure has been formulated and applied on the relevant results of the experimental campaign to calibrate the shape and the parameters of a local relationship between the equivalent bearing stress and the corresponding interface slip [20]. As a main outcome, the experimental-theoretical work has led to the definition of a trilinear bearing-stress-interface-slip law which is mainly affected by the local fastener detailing (namely, by whether it is installed with or without a washer) and, then, can be generally considered in the numerical analyses proposed herein.…”

“…The mechanical behaviour of the relevant materials and components is, then, discussed in Section 3. Particularly, State-of-the-Art knowledge about the interaction between the FRP strip and the mechanical fasteners is outlined, with special consideration to the results of recent studies carried out by the authors [19,20]. Moreover, some well-established relationships to simulate the behaviour of concrete in compression [21] and tension [22] are briefly recalled therein.…”

Bond characteristics of straight- and headed-end, ribbed-surface, GFRP bars embedded in high-strength concrete

“…Cosenza et al [22] investigated the bond stress-slip behavior of FRP bars and proposed a modification to the bond prediction evaluation (BPE) model to account for the FRP characteristics. Diverse efforts were dedicated in order to develop more refined bond-slip model to cover various surface treatments, shear and axial stiffness, bar diameter, bond length, confinement applied to the FRP bars due to concrete shrinkage or external loads, and swelling of FRP bars due to temperature variation and moisture absorption [32][33][34][35][36][37][38][39][40][41][42].…”

Stainless Steel Bonded to Concrete: An Experimental Assessment using the DIC Technique

“…This issue is of great importance, as can be attested to by the numerous researches found in the literature (Biscaia et al 2014;Mendes 2008;Martinelli et al 2012;Breña and McGuirk 2013;Realfonzo et al 2013;Wu and Liu 2013) seeking for a valid and alternative solution for enhancing the strength of EBR systems. Still, it is important to bear in mind that the use of steel mechanical fasteners involves making a hole on the SS strip which may lead to an important setback due to the reduction of the SS cross section of the strip to install the fasteners.…”