Study on the cyclic bending behaviour of CFRP strengthened full-scale CHS members

T. Tafsirojjaman; Sabrina Fawzia; David P. Thambiratnam; Xiao Ling Zhao

doi:10.1016/j.istruc.2020.09.015

Study on the cyclic bending behaviour of CFRP strengthened full-scale CHS members

T. Tafsirojjaman, Sabrina Fawzia, David P. Thambiratnam, Xiao Ling Zhao

Research output: Journal article publication › Journal article › Academic research › peer-review

21 Citations (Scopus)

Abstract

Circular hollow steel (CHS) members have been regarded as structural elements of choice for use in civil infrastructure. Despite the risk of seismic damage of steel structures during an earthquake due to its cyclic characteristics, studies on the cyclic strengthening of CHSs have been minimal. In the present study, a new finite element (FE) modelling approach is developed and applied to study the cyclic performance of carbon fibre reinforced polymer (CFRP) strengthened CHS specimens. The modelling techniques are first validated using results from the authors’ previous experimental work. A detailed parametric study is then carried out to evaluate the effects of CFRP bond length, CFRP layer numbers, ratio of thickness of CFRP to thickness of CHS, CHS member diameter-to-thickness ratio and steel grade on the cyclic performance of the CFRP strengthened CHS members. Results confirm the significant effects of these parameters on the cyclic performance of CFRP strengthened CHS members. The efficiency of CFRP strengthening increases with an increase in the ratio of the thickness of CFRP to the thickness of CHS and also with an increase in the diameter-to-thickness ratio of CHS specimens. Conversely, the efficiency of CFRP strengthening reduces with an increase in the steel grade. Moreover, the ultimate moment capacities obtained from the FE analyses of the bare and CFRP strengthened CHS specimens agree reasonably well with the theoretically predicted values.

Original language	English
Pages (from-to)	741-756
Number of pages	16
Journal	Structures
Volume	28
DOIs	https://doi.org/10.1016/j.istruc.2020.09.015
Publication status	Published - Dec 2020
Externally published	Yes

Keywords

CFRP
Circular hollow section (CHS)
Cyclic design factor
Cyclic loading
FE modelling
Parametric study
Strengthening

ASJC Scopus subject areas

Civil and Structural Engineering
Architecture
Building and Construction
Safety, Risk, Reliability and Quality

More information

10.1016/j.istruc.2020.09.015

Cite this

@article{8a3a901c8cb5489cb491919fd0e2dd53,

title = "Study on the cyclic bending behaviour of CFRP strengthened full-scale CHS members",

abstract = "Circular hollow steel (CHS) members have been regarded as structural elements of choice for use in civil infrastructure. Despite the risk of seismic damage of steel structures during an earthquake due to its cyclic characteristics, studies on the cyclic strengthening of CHSs have been minimal. In the present study, a new finite element (FE) modelling approach is developed and applied to study the cyclic performance of carbon fibre reinforced polymer (CFRP) strengthened CHS specimens. The modelling techniques are first validated using results from the authors{\textquoteright} previous experimental work. A detailed parametric study is then carried out to evaluate the effects of CFRP bond length, CFRP layer numbers, ratio of thickness of CFRP to thickness of CHS, CHS member diameter-to-thickness ratio and steel grade on the cyclic performance of the CFRP strengthened CHS members. Results confirm the significant effects of these parameters on the cyclic performance of CFRP strengthened CHS members. The efficiency of CFRP strengthening increases with an increase in the ratio of the thickness of CFRP to the thickness of CHS and also with an increase in the diameter-to-thickness ratio of CHS specimens. Conversely, the efficiency of CFRP strengthening reduces with an increase in the steel grade. Moreover, the ultimate moment capacities obtained from the FE analyses of the bare and CFRP strengthened CHS specimens agree reasonably well with the theoretically predicted values.",

keywords = "CFRP, Circular hollow section (CHS), Cyclic design factor, Cyclic loading, FE modelling, Parametric study, Strengthening",

author = "T. Tafsirojjaman and Sabrina Fawzia and Thambiratnam, \{David P.\} and Zhao, \{Xiao Ling\}",

note = "Funding Information: The authors wish to gratefully acknowledge the access to numerical software and high-performance computing (HPC) facilities provided by the Queensland University of Technology (QUT) to carry out the research reported in this study. At this time the processed/raw data required to regenerate the outcomes of the present study can not be shared as these data are also a part of ongoing research. Publisher Copyright: {\textcopyright} 2020 Institution of Structural Engineers",

year = "2020",

month = dec,

doi = "10.1016/j.istruc.2020.09.015",

language = "English",

volume = "28",

pages = "741--756",

journal = "Structures",

issn = "2352-0124",

publisher = "Elsevier Ltd",

}

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T1 - Study on the cyclic bending behaviour of CFRP strengthened full-scale CHS members

AU - Tafsirojjaman, T.

AU - Fawzia, Sabrina

AU - Thambiratnam, David P.

AU - Zhao, Xiao Ling

N1 - Funding Information: The authors wish to gratefully acknowledge the access to numerical software and high-performance computing (HPC) facilities provided by the Queensland University of Technology (QUT) to carry out the research reported in this study. At this time the processed/raw data required to regenerate the outcomes of the present study can not be shared as these data are also a part of ongoing research. Publisher Copyright: © 2020 Institution of Structural Engineers

PY - 2020/12

Y1 - 2020/12

N2 - Circular hollow steel (CHS) members have been regarded as structural elements of choice for use in civil infrastructure. Despite the risk of seismic damage of steel structures during an earthquake due to its cyclic characteristics, studies on the cyclic strengthening of CHSs have been minimal. In the present study, a new finite element (FE) modelling approach is developed and applied to study the cyclic performance of carbon fibre reinforced polymer (CFRP) strengthened CHS specimens. The modelling techniques are first validated using results from the authors’ previous experimental work. A detailed parametric study is then carried out to evaluate the effects of CFRP bond length, CFRP layer numbers, ratio of thickness of CFRP to thickness of CHS, CHS member diameter-to-thickness ratio and steel grade on the cyclic performance of the CFRP strengthened CHS members. Results confirm the significant effects of these parameters on the cyclic performance of CFRP strengthened CHS members. The efficiency of CFRP strengthening increases with an increase in the ratio of the thickness of CFRP to the thickness of CHS and also with an increase in the diameter-to-thickness ratio of CHS specimens. Conversely, the efficiency of CFRP strengthening reduces with an increase in the steel grade. Moreover, the ultimate moment capacities obtained from the FE analyses of the bare and CFRP strengthened CHS specimens agree reasonably well with the theoretically predicted values.

AB - Circular hollow steel (CHS) members have been regarded as structural elements of choice for use in civil infrastructure. Despite the risk of seismic damage of steel structures during an earthquake due to its cyclic characteristics, studies on the cyclic strengthening of CHSs have been minimal. In the present study, a new finite element (FE) modelling approach is developed and applied to study the cyclic performance of carbon fibre reinforced polymer (CFRP) strengthened CHS specimens. The modelling techniques are first validated using results from the authors’ previous experimental work. A detailed parametric study is then carried out to evaluate the effects of CFRP bond length, CFRP layer numbers, ratio of thickness of CFRP to thickness of CHS, CHS member diameter-to-thickness ratio and steel grade on the cyclic performance of the CFRP strengthened CHS members. Results confirm the significant effects of these parameters on the cyclic performance of CFRP strengthened CHS members. The efficiency of CFRP strengthening increases with an increase in the ratio of the thickness of CFRP to the thickness of CHS and also with an increase in the diameter-to-thickness ratio of CHS specimens. Conversely, the efficiency of CFRP strengthening reduces with an increase in the steel grade. Moreover, the ultimate moment capacities obtained from the FE analyses of the bare and CFRP strengthened CHS specimens agree reasonably well with the theoretically predicted values.

KW - CFRP

KW - Circular hollow section (CHS)

KW - Cyclic design factor

KW - Cyclic loading

KW - FE modelling

KW - Parametric study

KW - Strengthening

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DO - 10.1016/j.istruc.2020.09.015

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AN - SCOPUS:85090999565

SN - 2352-0124

VL - 28

SP - 741

EP - 756

JO - Structures

JF - Structures

ER -

Study on the cyclic bending behaviour of CFRP strengthened full-scale CHS members

Abstract

Keywords

ASJC Scopus subject areas

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