Modelling the delamination failure along the cfrp-cfst beam interaction surface using different finite element techniques

Ahmed W. Al-Zand, Wan Hamidon Wan Badaruzzaman, Azrul A Mutalib, Salam J. Hilo

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5 Citations (Scopus)

Abstract

Nonlinear finite element (FE) models are prepared to investigate the behaviour of concrete-filled steel tube (CFST) beams strengthened by carbon fibre reinforced polymer (CFRP) sheets. The beams are strengthened from the bottom side only by varied sheet lengths (full and partial beam lengths) and then subjected to ultimate flexural loads. Three surface interaction techniques are used to implement the bonding behaviour between the steel tube and the CFRP sheet, namely, full tie interaction (TI), cohesive element (CE) and cohesive behaviour (CB) techniques using ABAQUS software. Results of the comparison between the FE analysis and existing experimental study confirm that the FE models with the TI technique could be applicable for beams strengthened by CFRP sheets with a full wrapping length; the technique could not accurately implement the CFRP delamination failure, which occurred for beams with a partial wrapping length. Meanwhile, the FE models with the CE and CB techniques are applicable in the implementation of both CFRP failures (rapture and delamination) for both full and partial wrapping lengths, respectively. Where, the ultimate loads' ratios achieved by the FE models using TI, CE and CB techniques about 1.122, 1.047 and 1.045, respectively, comparing to the results of existing experimental tests.

Original languageEnglish
Pages (from-to)214-228
Number of pages15
JournalJournal of Engineering Science and Technology
Volume12
Issue number1
Publication statusPublished - 1 Jan 2017

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Delamination
Carbon fibers
Polymers
Steel
ABAQUS
Concretes
Finite element method

Keywords

  • ABAQUS
  • CFRP sheets
  • CFST Beam
  • Delamination
  • Finite Element

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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abstract = "Nonlinear finite element (FE) models are prepared to investigate the behaviour of concrete-filled steel tube (CFST) beams strengthened by carbon fibre reinforced polymer (CFRP) sheets. The beams are strengthened from the bottom side only by varied sheet lengths (full and partial beam lengths) and then subjected to ultimate flexural loads. Three surface interaction techniques are used to implement the bonding behaviour between the steel tube and the CFRP sheet, namely, full tie interaction (TI), cohesive element (CE) and cohesive behaviour (CB) techniques using ABAQUS software. Results of the comparison between the FE analysis and existing experimental study confirm that the FE models with the TI technique could be applicable for beams strengthened by CFRP sheets with a full wrapping length; the technique could not accurately implement the CFRP delamination failure, which occurred for beams with a partial wrapping length. Meanwhile, the FE models with the CE and CB techniques are applicable in the implementation of both CFRP failures (rapture and delamination) for both full and partial wrapping lengths, respectively. Where, the ultimate loads' ratios achieved by the FE models using TI, CE and CB techniques about 1.122, 1.047 and 1.045, respectively, comparing to the results of existing experimental tests.",
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AU - Wan Badaruzzaman, Wan Hamidon

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AU - Hilo, Salam J.

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N2 - Nonlinear finite element (FE) models are prepared to investigate the behaviour of concrete-filled steel tube (CFST) beams strengthened by carbon fibre reinforced polymer (CFRP) sheets. The beams are strengthened from the bottom side only by varied sheet lengths (full and partial beam lengths) and then subjected to ultimate flexural loads. Three surface interaction techniques are used to implement the bonding behaviour between the steel tube and the CFRP sheet, namely, full tie interaction (TI), cohesive element (CE) and cohesive behaviour (CB) techniques using ABAQUS software. Results of the comparison between the FE analysis and existing experimental study confirm that the FE models with the TI technique could be applicable for beams strengthened by CFRP sheets with a full wrapping length; the technique could not accurately implement the CFRP delamination failure, which occurred for beams with a partial wrapping length. Meanwhile, the FE models with the CE and CB techniques are applicable in the implementation of both CFRP failures (rapture and delamination) for both full and partial wrapping lengths, respectively. Where, the ultimate loads' ratios achieved by the FE models using TI, CE and CB techniques about 1.122, 1.047 and 1.045, respectively, comparing to the results of existing experimental tests.

AB - Nonlinear finite element (FE) models are prepared to investigate the behaviour of concrete-filled steel tube (CFST) beams strengthened by carbon fibre reinforced polymer (CFRP) sheets. The beams are strengthened from the bottom side only by varied sheet lengths (full and partial beam lengths) and then subjected to ultimate flexural loads. Three surface interaction techniques are used to implement the bonding behaviour between the steel tube and the CFRP sheet, namely, full tie interaction (TI), cohesive element (CE) and cohesive behaviour (CB) techniques using ABAQUS software. Results of the comparison between the FE analysis and existing experimental study confirm that the FE models with the TI technique could be applicable for beams strengthened by CFRP sheets with a full wrapping length; the technique could not accurately implement the CFRP delamination failure, which occurred for beams with a partial wrapping length. Meanwhile, the FE models with the CE and CB techniques are applicable in the implementation of both CFRP failures (rapture and delamination) for both full and partial wrapping lengths, respectively. Where, the ultimate loads' ratios achieved by the FE models using TI, CE and CB techniques about 1.122, 1.047 and 1.045, respectively, comparing to the results of existing experimental tests.

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