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The effect of helical pitch on the behaviour of helically confined HSC beams

Journal Article


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Abstract


  • The strength and ductility of HSC beams are enhanced through the application of helical reinforcement located in the compression

    region of the beams. The pitch of helix is an important parameter controlling the level of strength and ductility enhancement of overreinforced

    high strength concrete beams. This paper presents an experimental investigation of the effect of helix pitch on the beam behaviour

    through testing five helically confined full-scale beams. The helix pitches were 25, 50, 75, 100 and 160 mm. Beams cross section was

    200 ÷ 300 mm, and with a length of 4 m and a clear span 3.6 m subjected to four point loading, with emphasis placed on the mid-span

    deflection. The main results indicate that the helical effectiveness is negligible when the helical pitch is 160 mm (helix diameter), the concrete

    cover spalling off load increases linearly as the helical pitch increased, and the ultimate load decreases as the helical pitch increases.

    Finally, there is a considerable release of strain energy responsible for spalling off the concrete cover.

Publication Date


  • 2008

Citation


  • Hadi, M. N. S. & Elbasha, N. (2008). The effect of helical pitch on the behaviour of helically confined HSC beams. Construction and Building Materials, 22 (5), 771-780.

Scopus Eid


  • 2-s2.0-40649097563

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5763&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2832

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 771

End Page


  • 780

Volume


  • 22

Issue


  • 5

Abstract


  • The strength and ductility of HSC beams are enhanced through the application of helical reinforcement located in the compression

    region of the beams. The pitch of helix is an important parameter controlling the level of strength and ductility enhancement of overreinforced

    high strength concrete beams. This paper presents an experimental investigation of the effect of helix pitch on the beam behaviour

    through testing five helically confined full-scale beams. The helix pitches were 25, 50, 75, 100 and 160 mm. Beams cross section was

    200 ÷ 300 mm, and with a length of 4 m and a clear span 3.6 m subjected to four point loading, with emphasis placed on the mid-span

    deflection. The main results indicate that the helical effectiveness is negligible when the helical pitch is 160 mm (helix diameter), the concrete

    cover spalling off load increases linearly as the helical pitch increased, and the ultimate load decreases as the helical pitch increases.

    Finally, there is a considerable release of strain energy responsible for spalling off the concrete cover.

Publication Date


  • 2008

Citation


  • Hadi, M. N. S. & Elbasha, N. (2008). The effect of helical pitch on the behaviour of helically confined HSC beams. Construction and Building Materials, 22 (5), 771-780.

Scopus Eid


  • 2-s2.0-40649097563

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5763&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2832

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 771

End Page


  • 780

Volume


  • 22

Issue


  • 5