The influence of strengthening the hollow steel tube and CFST beams using U-shaped CFRP wrapping scheme

Ahmed W. Al Zand, Emad Hosseinpour, Wan Hamidon Wan Badaruzzaman

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This study investigated the behaviour of the simply supported hollow steel tube (HST) beams, either concrete filled or unfilled when strengthened with carbon fibre reinforced polymer (CFRP) sheets. Eight specimens with varied tubes thickness (sections classification 1 and 3) were all tested experimentally under static flexural loading, four out of eight were filled with normal concrete (CFST beams). Particularly, the partial CFRP strengthening scheme was used, which wrapped the bottom-half of the beams cross-section (U-shaped wrapping), in order to use the efficiency of high tensile strength of CFRP sheets at the tension stress only of simply supported beams. In general, the results showed that the CFRP sheets significantly improved the ultimate strength and energy absorption capacities of the CFST beams with very limited improvement on the related HST beams. For example, the load and energy absorption capacities for the CFST beams (tube section class 1) were increased about 20% and 32.6%, respectively, when partially strengthened with two CFRP layers, and these improvements had increased more (62% and 38%) for the same CFST beams using tube class 3. However, these capacities recorded no much improvement on the related unfilled HST beams when the same CFRP strengthening scheme was adopted.

Original languageEnglish
Pages (from-to)229-235
Number of pages7
JournalStructural Engineering and Mechanics
Volume66
Issue number2
DOIs
Publication statusPublished - 25 Apr 2018

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Carbon fibers
Steel
Polymers
Energy absorption
Concretes
Tensile strength

Keywords

  • CFRP strengthening
  • CFST beams
  • Energy absorption
  • HST beams
  • Partial wrapping

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

The influence of strengthening the hollow steel tube and CFST beams using U-shaped CFRP wrapping scheme. / Al Zand, Ahmed W.; Hosseinpour, Emad; Wan Badaruzzaman, Wan Hamidon.

In: Structural Engineering and Mechanics, Vol. 66, No. 2, 25.04.2018, p. 229-235.

Research output: Contribution to journalArticle

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