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The effect of CFRP and CFRP/concrete interface models when modelling retrofitted RC beams with FEM

Obaidat, Yasmeen LU ; Heyden, Susanne LU and Dahlblom, Ola LU (2010) In Composite Structures 92(6). p.1391-1398
Abstract
Concrete structures retrofitted with fibre reinforced plastic (FRP) applications have become widespread in the last decade due to the economic benefit from it. This paper presents a finite element analysis which is validated against laboratory tests of eight beams. All beams had the same rectangular cross-section geometry and were loaded under four point bending, but differed in the length of the carbon fibre reinforced plastic (CFRP) plate. The commercial numerical analysis tool Abaqus was used, and different material models were evaluated with respect to their ability to describe the behaviour of the beams. Linear elastic isotropic and orthotropic models were used for the CFRP and a perfect bond model and a cohesive bond model was used... (More)
Concrete structures retrofitted with fibre reinforced plastic (FRP) applications have become widespread in the last decade due to the economic benefit from it. This paper presents a finite element analysis which is validated against laboratory tests of eight beams. All beams had the same rectangular cross-section geometry and were loaded under four point bending, but differed in the length of the carbon fibre reinforced plastic (CFRP) plate. The commercial numerical analysis tool Abaqus was used, and different material models were evaluated with respect to their ability to describe the behaviour of the beams. Linear elastic isotropic and orthotropic models were used for the CFRP and a perfect bond model and a cohesive bond model was used for the concrete-CFRP interface. A plastic damage model was used for the concrete. The analyses results show good agreement with the experimental data regarding load-displacement response, crack pattern and debonding failure mode when the cohesive bond model is used. The perfect bond model failed to capture the softening behaviour of the beams. There is no significant difference between the elastic isotropic and orthotropic models for the CFRP. (C) 2009 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Finite element analysis (FEA), Reinforced concrete beam, Cohesive model, Laminate, Carbon fibre reinforced plastic (CFRP), Strengthening
in
Composite Structures
volume
92
issue
6
pages
1391 - 1398
publisher
Elsevier
external identifiers
  • wos:000275244900011
  • scopus:75149122719
ISSN
1879-1085
DOI
10.1016/j.compstruct.2009.11.008
language
English
LU publication?
yes
id
31532596-c332-4cfa-b5f1-b6eee5ece83e (old id 1589671)
date added to LUP
2010-04-20 09:45:22
date last changed
2018-07-15 03:12:59
@article{31532596-c332-4cfa-b5f1-b6eee5ece83e,
  abstract     = {Concrete structures retrofitted with fibre reinforced plastic (FRP) applications have become widespread in the last decade due to the economic benefit from it. This paper presents a finite element analysis which is validated against laboratory tests of eight beams. All beams had the same rectangular cross-section geometry and were loaded under four point bending, but differed in the length of the carbon fibre reinforced plastic (CFRP) plate. The commercial numerical analysis tool Abaqus was used, and different material models were evaluated with respect to their ability to describe the behaviour of the beams. Linear elastic isotropic and orthotropic models were used for the CFRP and a perfect bond model and a cohesive bond model was used for the concrete-CFRP interface. A plastic damage model was used for the concrete. The analyses results show good agreement with the experimental data regarding load-displacement response, crack pattern and debonding failure mode when the cohesive bond model is used. The perfect bond model failed to capture the softening behaviour of the beams. There is no significant difference between the elastic isotropic and orthotropic models for the CFRP. (C) 2009 Elsevier Ltd. All rights reserved.},
  author       = {Obaidat, Yasmeen and Heyden, Susanne and Dahlblom, Ola},
  issn         = {1879-1085},
  keyword      = {Finite element analysis (FEA),Reinforced concrete beam,Cohesive model,Laminate,Carbon fibre reinforced plastic (CFRP),Strengthening},
  language     = {eng},
  number       = {6},
  pages        = {1391--1398},
  publisher    = {Elsevier},
  series       = {Composite Structures},
  title        = {The effect of CFRP and CFRP/concrete interface models when modelling retrofitted RC beams with FEM},
  url          = {http://dx.doi.org/10.1016/j.compstruct.2009.11.008},
  volume       = {92},
  year         = {2010},
}