TY - JOUR
T1 - Analytical model with uncoupled adhesion laws for the bond failure prediction of curved FRP-concrete joints subjected to temperature
AU - Biscaia, Hugo C.
AU - Chastre, Carlos
AU - Silva, Manuel A. G.
N1 - Sem PDF conforme despacho.
info:eu-repo/grantAgreement/FCT/5876/147351/PT#
The first author would like to thank to Fundação para a Ciência e Tecnologia for the partial funding of this work under the strategic project UID/EMS/00667/2013 and research grant SFRH/BPD/111787/2015.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - The strengthening of structures such as columns, beams, arches or slabs with Fibre Reinforced Polymers (FRP) has been the focus of several studies. However, the studies dedicated to the FRP debonding phenomenon of curved bonded joints affected by elevated temperatures are surprisingly limited and no studies on this topic are known, at present, to use nonlinear analytical or numerical approaches. Still, the available studies found in the literature are unanimous in affirming that the debonding phenomenon on such curved interfaces demands the interaction between Fracture Modes I and II. The present work aims to develop an analytical solution capable of simulating the debonding process of curved CFRP-to-concrete interfaces with a constant radius subjected to mechanical and/or thermal loads. Some examples are presented in which the influence of the radius of the interface and the temperature level is analysed. The analytical solution proposed here is based on adhesion laws in which, in the case of Mode II, an exponential bond vs. relative displacement law with temperature dependency is assumed, whereas the Mode I adhesive law is based on a linear with fragile rupture law with the same temperature dependency as Mode II.
AB - The strengthening of structures such as columns, beams, arches or slabs with Fibre Reinforced Polymers (FRP) has been the focus of several studies. However, the studies dedicated to the FRP debonding phenomenon of curved bonded joints affected by elevated temperatures are surprisingly limited and no studies on this topic are known, at present, to use nonlinear analytical or numerical approaches. Still, the available studies found in the literature are unanimous in affirming that the debonding phenomenon on such curved interfaces demands the interaction between Fracture Modes I and II. The present work aims to develop an analytical solution capable of simulating the debonding process of curved CFRP-to-concrete interfaces with a constant radius subjected to mechanical and/or thermal loads. Some examples are presented in which the influence of the radius of the interface and the temperature level is analysed. The analytical solution proposed here is based on adhesion laws in which, in the case of Mode II, an exponential bond vs. relative displacement law with temperature dependency is assumed, whereas the Mode I adhesive law is based on a linear with fragile rupture law with the same temperature dependency as Mode II.
KW - Bond failure
KW - Concrete
KW - Curved bonded joints
KW - FRP composites
KW - Nonlinear analytical approach
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=85011385355&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2017.01.008
DO - 10.1016/j.tafmec.2017.01.008
M3 - Article
VL - 89
SP - 63
EP - 78
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
ER -