Bond–slip models for FRP sheets/plates bonded to concrete

Advances on the Behavior Characterization of FRP-Anchored Carbon Fiber-Reinforced Polymer (CFRP) Sheets Used to Strengthen Concrete Elements

“…From a behavioral perspective, however, models that allow estimation of the force-displacement relationship between FRP sheets and concrete substrates are better suited (Lu et al 2005;Nakaba et al 2001). The performance of two of these models is compared here for use in finite element simulations of FRP sheets bonded to concrete presented later in this paper.…”

“…A summary of the key equations defining the models is given here, while complete details are given in the original references. Lu et al (2005) Lu et al (2005) conducted a critical review of available bond strength models and shear stress-slip relationships. They compared the performance of the different models using an extensive experimental database of single and double shear tests, and suggested a series of models based on empirical calibration of results from finite element simulations.…”

Experimental Measurements and Numerical Simuation of Novel Anchoring Devices for Open Hoop Fiber Reinforcing Polymer Strips Used in the Shear Upgrade of R/C T-Beams

“…This In all these shear strengthening schemes, shown in figures 3b to 3d, open hoop CFRP strips were employed in an effort not to break the reinforced slab of the T-Beam, apart from drilling relatively small diameter holes. In the first scheme the open hoop CFRP strip was simply attached at the sides and bottom of the R/C T-Beam, as shown in figure 3b, leaving the R/C slab undisturbed [2,11,12]. Alternatively in the second scheme, the open hoop CFRP strip was again attached at the sides of the T-Beam also employing side mechanical anchors devised by the authors [3], in the way shown in figure 3c.…”

Experimental Assessment of Carbon Fiber Jacketing of Steel Plates

“…Specifically, relationship between vertical forces and displacements is linearly elastic adopting the steel Young's modulus while the corresponding behavior in the horizontal direction is reported in Figure 5. Such a constitutive model, proposed in [18], proved to be suitable for modeling Mode-II delamination and has become a consolidated standard in common practice [3]. It is characterized by a horizontal peak stress ⌧ max and strains 1 , 2 and f which have to be identified.…”