Experimental Evaluation of Bonding between CFRP Laminates and Different Structural Materials

Hugo C. Biscaia; Carlos Chastre; Isabel S. Borba; Cinderela Silva; David Cruz

doi:10.1061/(ASCE)CC.1943-5614.0000631

Experimental Evaluation of Bonding between CFRP Laminates and Different Structural Materials

Hugo C. Biscaia, Carlos Chastre, Isabel S. Borba, Cinderela Silva, David Cruz

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35 Citations (Scopus)

Abstract

This study presents an analysis of carbon fiber reinforced polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber; concrete, and steel, using the same CFRP laminates and adhesive agent. The externally bonded reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local nonlinear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed trilinear and bilinear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy. (C) 2015 American Society of Civil Engineers.

Original language	English
Article number	04015070
Number of pages	15
Journal	Journal of composites for construction
Volume	20
Issue number	3
DOIs	https://doi.org/10.1061/(ASCE)CC.1943-5614.0000631
Publication status	Published - Jun 2016

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10.1061/(ASCE)CC.1943-5614.0000631

Cite this

@article{bb1b576a540f49baad659fffce8e2f45,

title = "Experimental Evaluation of Bonding between CFRP Laminates and Different Structural Materials",

abstract = "This study presents an analysis of carbon fiber reinforced polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber; concrete, and steel, using the same CFRP laminates and adhesive agent. The externally bonded reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local nonlinear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed trilinear and bilinear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy. (C) 2015 American Society of Civil Engineers.",

keywords = "Carbon fiber reinforced polymers (CFRP), Bond-slip, Concrete, Steel, Timber, Debonding, Mechanical testing, TO-CONCRETE INTERFACES, MATERIAL BONDED JOINTS, NUMERICAL-ANALYSIS, ANCHORAGE SYSTEMS, SLIP MODELS, SHEAR TESTS, FRP, BEHAVIOR, DELAMINATION, FRACTURE",

author = "Biscaia, {Hugo C.} and Carlos Chastre and Borba, {Isabel S.} and Cinderela Silva and David Cruz",

note = "The authors are grateful to Fundacao para a Ciencia e Tecnologia for partial financing of the work under the UNIDEMI Strategic Project UID/EMS/00667/2013.",

year = "2016",

month = jun,

doi = "10.1061/(ASCE)CC.1943-5614.0000631",

language = "English",

volume = "20",

journal = "Journal of composites for construction",

issn = "1090-0268",

publisher = "ASCE-AMER SOC CIVIL ENGINEERS",

number = "3",

}

TY - JOUR

T1 - Experimental Evaluation of Bonding between CFRP Laminates and Different Structural Materials

AU - Biscaia, Hugo C.

AU - Chastre, Carlos

AU - Borba, Isabel S.

AU - Silva, Cinderela

AU - Cruz, David

N1 - The authors are grateful to Fundacao para a Ciencia e Tecnologia for partial financing of the work under the UNIDEMI Strategic Project UID/EMS/00667/2013.

PY - 2016/6

Y1 - 2016/6

N2 - This study presents an analysis of carbon fiber reinforced polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber; concrete, and steel, using the same CFRP laminates and adhesive agent. The externally bonded reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local nonlinear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed trilinear and bilinear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy. (C) 2015 American Society of Civil Engineers.

AB - This study presents an analysis of carbon fiber reinforced polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber; concrete, and steel, using the same CFRP laminates and adhesive agent. The externally bonded reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local nonlinear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed trilinear and bilinear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy. (C) 2015 American Society of Civil Engineers.

KW - Carbon fiber reinforced polymers (CFRP)

KW - Bond-slip

KW - Concrete

KW - Steel

KW - Timber

KW - Debonding

KW - Mechanical testing

KW - TO-CONCRETE INTERFACES

KW - MATERIAL BONDED JOINTS

KW - NUMERICAL-ANALYSIS

KW - ANCHORAGE SYSTEMS

KW - SLIP MODELS

KW - SHEAR TESTS

KW - FRP

KW - BEHAVIOR

KW - DELAMINATION

KW - FRACTURE

U2 - 10.1061/(ASCE)CC.1943-5614.0000631

DO - 10.1061/(ASCE)CC.1943-5614.0000631

M3 - Article

VL - 20

JO - Journal of composites for construction

JF - Journal of composites for construction

SN - 1090-0268

IS - 3

M1 - 04015070

ER -