Analysis of the debonding process of CFRP-to-timber interfaces

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The use of Fiber Reinforced Polymers (FRP) in the strengthening of timber structures is quite recent and few studies have discussed the debonding between these materials. The analysis of the Mode II debonding process between FRP composites and timber elements may be of great importance because this mode is predominant in the case, for instance, of the bending of beams. Knowing the appropriate bond-slip model to use on the estimation of the performance of FRP-to-timber interfaces is greatly relevant. Under such circumstances, a detailed knowledge of all the states that CFRP-to-timber interfaces are subjected to is important as well. The current work gives answers to these aspects proposing an analytical solution based on a tri-linear bond-slip model that is capable of describing precisely the full-range debonding behavior of FRP-to-timber interfaces. Thus, the purpose of this study is to contribute to existing knowledge with an analytical solution capable of describing the full-range debonding process between a FRP composite and a substrate. The analytical solutions herein proposed are also compared with the results obtained from several experiments based on single-lap shear tests. Comparisons at different load levels and different bonded lengths are presented. The slips, strains in the CFRP composite and bond stress distributions within the bonded interface are emphasized in the text. The complete load-slip response of CFRP-to-timber interface is also analyzed. Each state of the debonding process is described and each one is identified in the load-slip curve. (C) 2016 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)96-112
Number of pages17
JournalConstruction and Building Materials
Volume113
DOIs
Publication statusPublished - 15 Jun 2016

Keywords

  • CFRP
  • Bond-slip
  • Timber
  • Debonding
  • Interface
  • MATERIAL BONDED JOINTS
  • CONCRETE INTERFACES
  • NUMERICAL-ANALYSIS
  • RC BEAMS
  • FRP
  • DELAMINATION
  • FAILURE
  • REINFORCEMENT
  • BEHAVIOR
  • SYSTEMS

Cite this

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title = "Analysis of the debonding process of CFRP-to-timber interfaces",
abstract = "The use of Fiber Reinforced Polymers (FRP) in the strengthening of timber structures is quite recent and few studies have discussed the debonding between these materials. The analysis of the Mode II debonding process between FRP composites and timber elements may be of great importance because this mode is predominant in the case, for instance, of the bending of beams. Knowing the appropriate bond-slip model to use on the estimation of the performance of FRP-to-timber interfaces is greatly relevant. Under such circumstances, a detailed knowledge of all the states that CFRP-to-timber interfaces are subjected to is important as well. The current work gives answers to these aspects proposing an analytical solution based on a tri-linear bond-slip model that is capable of describing precisely the full-range debonding behavior of FRP-to-timber interfaces. Thus, the purpose of this study is to contribute to existing knowledge with an analytical solution capable of describing the full-range debonding process between a FRP composite and a substrate. The analytical solutions herein proposed are also compared with the results obtained from several experiments based on single-lap shear tests. Comparisons at different load levels and different bonded lengths are presented. The slips, strains in the CFRP composite and bond stress distributions within the bonded interface are emphasized in the text. The complete load-slip response of CFRP-to-timber interface is also analyzed. Each state of the debonding process is described and each one is identified in the load-slip curve. (C) 2016 Elsevier Ltd. All rights reserved.",
keywords = "CFRP, Bond-slip, Timber, Debonding, Interface, MATERIAL BONDED JOINTS, CONCRETE INTERFACES, NUMERICAL-ANALYSIS, RC BEAMS, FRP, DELAMINATION, FAILURE, REINFORCEMENT, BEHAVIOR, SYSTEMS",
author = "Biscaia, {Hugo C.} and David Cruz and Carlos Chastre",
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Analysis of the debonding process of CFRP-to-timber interfaces. / Biscaia, Hugo C.; Cruz, David; Chastre, Carlos.

In: Construction and Building Materials, Vol. 113, 15.06.2016, p. 96-112.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Analysis of the debonding process of CFRP-to-timber interfaces

AU - Biscaia, Hugo C.

AU - Cruz, David

AU - Chastre, Carlos

N1 - sem pdf conforme despacho. Fundacao para a Ciencia e Tecnologia under the UNIDEMI Strategic Project - UID/EMS/00667/2013 ; SFRH/BPD/111787/2015.

PY - 2016/6/15

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N2 - The use of Fiber Reinforced Polymers (FRP) in the strengthening of timber structures is quite recent and few studies have discussed the debonding between these materials. The analysis of the Mode II debonding process between FRP composites and timber elements may be of great importance because this mode is predominant in the case, for instance, of the bending of beams. Knowing the appropriate bond-slip model to use on the estimation of the performance of FRP-to-timber interfaces is greatly relevant. Under such circumstances, a detailed knowledge of all the states that CFRP-to-timber interfaces are subjected to is important as well. The current work gives answers to these aspects proposing an analytical solution based on a tri-linear bond-slip model that is capable of describing precisely the full-range debonding behavior of FRP-to-timber interfaces. Thus, the purpose of this study is to contribute to existing knowledge with an analytical solution capable of describing the full-range debonding process between a FRP composite and a substrate. The analytical solutions herein proposed are also compared with the results obtained from several experiments based on single-lap shear tests. Comparisons at different load levels and different bonded lengths are presented. The slips, strains in the CFRP composite and bond stress distributions within the bonded interface are emphasized in the text. The complete load-slip response of CFRP-to-timber interface is also analyzed. Each state of the debonding process is described and each one is identified in the load-slip curve. (C) 2016 Elsevier Ltd. All rights reserved.

AB - The use of Fiber Reinforced Polymers (FRP) in the strengthening of timber structures is quite recent and few studies have discussed the debonding between these materials. The analysis of the Mode II debonding process between FRP composites and timber elements may be of great importance because this mode is predominant in the case, for instance, of the bending of beams. Knowing the appropriate bond-slip model to use on the estimation of the performance of FRP-to-timber interfaces is greatly relevant. Under such circumstances, a detailed knowledge of all the states that CFRP-to-timber interfaces are subjected to is important as well. The current work gives answers to these aspects proposing an analytical solution based on a tri-linear bond-slip model that is capable of describing precisely the full-range debonding behavior of FRP-to-timber interfaces. Thus, the purpose of this study is to contribute to existing knowledge with an analytical solution capable of describing the full-range debonding process between a FRP composite and a substrate. The analytical solutions herein proposed are also compared with the results obtained from several experiments based on single-lap shear tests. Comparisons at different load levels and different bonded lengths are presented. The slips, strains in the CFRP composite and bond stress distributions within the bonded interface are emphasized in the text. The complete load-slip response of CFRP-to-timber interface is also analyzed. Each state of the debonding process is described and each one is identified in the load-slip curve. (C) 2016 Elsevier Ltd. All rights reserved.

KW - CFRP

KW - Bond-slip

KW - Timber

KW - Debonding

KW - Interface

KW - MATERIAL BONDED JOINTS

KW - CONCRETE INTERFACES

KW - NUMERICAL-ANALYSIS

KW - RC BEAMS

KW - FRP

KW - DELAMINATION

KW - FAILURE

KW - REINFORCEMENT

KW - BEHAVIOR

KW - SYSTEMS

U2 - 10.1016/j.conbuildmat.2016.03.033

DO - 10.1016/j.conbuildmat.2016.03.033

M3 - Article

VL - 113

SP - 96

EP - 112

JO - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

ER -