Flexural strength evaluation of concrete-filled steel tube (CFST) composite girder

Junghyun Cho, Jiho Moon, Hee Jung Ko, Hak Eun Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The flexural strength of the concrete-filled steel tube (CFST) composite girder was investigated in this study. Firstly, simple equations to evaluate the flexural strength of the CFST composite girder under both positive and negative bending moment were derived based on the plastic stress distribution method (PSDM). A series of tests was then conducted to verify the accuracy of the proposed equation, and to investigate the effect of internal shear connectors between the steel tube and concrete infill. Further, non-linear finite element analysis for each test specimen was performed to demonstrate the failure mechanism, and to set up the verified finite element analysis model. From the results, it was found that the proposed equations provided a reasonably conservative prediction of the flexural strength of the CFST composite girder under both positive and negative bending moment, and the effect of internal shear connectors between the steel tube and concrete infill on the flexural strength was negligible. A series of parametric studies was performed to investigate the effect of the D/t ratio, compressive strength of the concrete infill, and local buckling of the steel tube on the flexural strength of the CFST composite girder. Finally, some design considerations are noted based on the results of the parametric study.

Original languageEnglish
Pages (from-to)12-24
Number of pages13
JournalJournal of Constructional Steel Research
Volume151
DOIs
Publication statusPublished - 2018 Dec 1

Fingerprint

Steel
Bending strength
Concretes
Composite materials
Bending moments
Finite element method
Compressive strength
Buckling
Stress concentration
Plastics

Keywords

  • Composite girder
  • Concrete-filled steel tube (CFST)
  • Flexural strength
  • Steel-concrete composite structure

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Flexural strength evaluation of concrete-filled steel tube (CFST) composite girder. / Cho, Junghyun; Moon, Jiho; Ko, Hee Jung; Lee, Hak Eun.

In: Journal of Constructional Steel Research, Vol. 151, 01.12.2018, p. 12-24.

Research output: Contribution to journalArticle

@article{ea5debf25f2c41a38020ee7e02f2cef4,
title = "Flexural strength evaluation of concrete-filled steel tube (CFST) composite girder",
abstract = "The flexural strength of the concrete-filled steel tube (CFST) composite girder was investigated in this study. Firstly, simple equations to evaluate the flexural strength of the CFST composite girder under both positive and negative bending moment were derived based on the plastic stress distribution method (PSDM). A series of tests was then conducted to verify the accuracy of the proposed equation, and to investigate the effect of internal shear connectors between the steel tube and concrete infill. Further, non-linear finite element analysis for each test specimen was performed to demonstrate the failure mechanism, and to set up the verified finite element analysis model. From the results, it was found that the proposed equations provided a reasonably conservative prediction of the flexural strength of the CFST composite girder under both positive and negative bending moment, and the effect of internal shear connectors between the steel tube and concrete infill on the flexural strength was negligible. A series of parametric studies was performed to investigate the effect of the D/t ratio, compressive strength of the concrete infill, and local buckling of the steel tube on the flexural strength of the CFST composite girder. Finally, some design considerations are noted based on the results of the parametric study.",
keywords = "Composite girder, Concrete-filled steel tube (CFST), Flexural strength, Steel-concrete composite structure",
author = "Junghyun Cho and Jiho Moon and Ko, {Hee Jung} and Lee, {Hak Eun}",
year = "2018",
month = "12",
day = "1",
doi = "10.1016/j.jcsr.2018.08.038",
language = "English",
volume = "151",
pages = "12--24",
journal = "Journal of Constructional Steel Research",
issn = "0143-974X",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Flexural strength evaluation of concrete-filled steel tube (CFST) composite girder

AU - Cho, Junghyun

AU - Moon, Jiho

AU - Ko, Hee Jung

AU - Lee, Hak Eun

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The flexural strength of the concrete-filled steel tube (CFST) composite girder was investigated in this study. Firstly, simple equations to evaluate the flexural strength of the CFST composite girder under both positive and negative bending moment were derived based on the plastic stress distribution method (PSDM). A series of tests was then conducted to verify the accuracy of the proposed equation, and to investigate the effect of internal shear connectors between the steel tube and concrete infill. Further, non-linear finite element analysis for each test specimen was performed to demonstrate the failure mechanism, and to set up the verified finite element analysis model. From the results, it was found that the proposed equations provided a reasonably conservative prediction of the flexural strength of the CFST composite girder under both positive and negative bending moment, and the effect of internal shear connectors between the steel tube and concrete infill on the flexural strength was negligible. A series of parametric studies was performed to investigate the effect of the D/t ratio, compressive strength of the concrete infill, and local buckling of the steel tube on the flexural strength of the CFST composite girder. Finally, some design considerations are noted based on the results of the parametric study.

AB - The flexural strength of the concrete-filled steel tube (CFST) composite girder was investigated in this study. Firstly, simple equations to evaluate the flexural strength of the CFST composite girder under both positive and negative bending moment were derived based on the plastic stress distribution method (PSDM). A series of tests was then conducted to verify the accuracy of the proposed equation, and to investigate the effect of internal shear connectors between the steel tube and concrete infill. Further, non-linear finite element analysis for each test specimen was performed to demonstrate the failure mechanism, and to set up the verified finite element analysis model. From the results, it was found that the proposed equations provided a reasonably conservative prediction of the flexural strength of the CFST composite girder under both positive and negative bending moment, and the effect of internal shear connectors between the steel tube and concrete infill on the flexural strength was negligible. A series of parametric studies was performed to investigate the effect of the D/t ratio, compressive strength of the concrete infill, and local buckling of the steel tube on the flexural strength of the CFST composite girder. Finally, some design considerations are noted based on the results of the parametric study.

KW - Composite girder

KW - Concrete-filled steel tube (CFST)

KW - Flexural strength

KW - Steel-concrete composite structure

UR - http://www.scopus.com/inward/record.url?scp=85053766348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053766348&partnerID=8YFLogxK

U2 - 10.1016/j.jcsr.2018.08.038

DO - 10.1016/j.jcsr.2018.08.038

M3 - Article

AN - SCOPUS:85053766348

VL - 151

SP - 12

EP - 24

JO - Journal of Constructional Steel Research

JF - Journal of Constructional Steel Research

SN - 0143-974X

ER -