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Title: Numerical Modelling of FRP-Concrete Bonded Interfaces Anchored with FRP Anchors

Author(s): Scott T. Smith and Huawen Zhang

Publication: Symposium Paper

Volume: 322


Appears on pages(s): 16.1-16.14

Keywords: Anchors, Bond, Concrete, Debonding, FRP, Joints, Numerical Modelling, Partial Interaction Model, Parametric Studies

DOI: 10.14359/51706967

Date: 6/18/2018

A commonly reported failure mode through experimentation of fibre-reinforced polymer (FRP)-concrete bonded interfaces is premature debonding of the FRP. Such undesirable failure can occur at strains significantly lower than the strain capacity of the FRP and it can be sudden. Anchorage of the FRP is an intuitive means to delay and even halt debonding, and the addition of anchors can also lead to more deformable FRP-strengthened elements. The so-called FRP anchor has been shown to be an effective anchorage device and while there have been several experimental studies reported to date on FRP-strengthened RC elements anchored with such anchors, there has been decidedly less research on numerical modelling. This paper presents the details of a partial interaction model and a constitutive model for the FRP-to-concrete bonded interface as well as FRP anchors. The models are then used to simulate FRP anchors in single-shear FRP-to-concrete joints. The results of parametric studies on key variables such as plate geometry and plate material properties as well as anchor location and number of anchors are then provided. The parametric studies enable insights to be gained towards the contribution of FRP anchors in FRP-to-concrete bonded interfaces.