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New technique for strengthening squarereinforced concrete columns by the circularisation with reactive powder concrete and wrapping with fibre-reinforced polymer

Journal Article


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Abstract


  • This paper presents a new strengthening technique for square-reinforced concrete (RC) columns by

    circularisation with reactive powder concrete (RPC) and wrapping with fibre-reinforced polymer (FRP).

    RC column specimens were tested, divided into four groups of four specimens based on the strengthening

    technique: four reference square specimens (150mm side length) without any strengthening,

    four were wrapped with two layers of carbon fibre-reinforced polymer (CFRP) and the remaining eight

    were strengthened by changing the square cross-section to a 240mm diameter circle with RPC jacket.

    Four of the RPC jacketed specimens were left unwrapped, while the last four were wrapped with two

    layers of CFRP. From each group, one specimen was tested under concentric axial load, two were

    tested under eccentric axial load and one was tested under four-point bending. It was found that

    using the RPC for circularisation and strengthening of existing square RC columns is an effective technique

    to significantly increase their axial carrying capacity, ultimate flexural load and energy absorption.

    Wrapping the circularised RC columns with CFRP prevented the failure of the RPC jacket at the

    corners of the existing square RC columns under the axial load, and improved the ultimate load as

    well as the energy absorption of the circularised RC columns.

Publication Date


  • 2019

Citation


  • Algburi, A. H. M., Sheikh, M. Neaz. & Hadi, M. N. S. (2019). New technique for strengthening squarereinforced concrete columns by the circularisation with reactive powder concrete and wrapping with fibre-reinforced polymer. Structure and Infrastructure Engineering: maintenance, management, life-cycle design and performance, 15 (10), 1392-1403.

Scopus Eid


  • 2-s2.0-85067333847

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/3808/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2799

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1392

End Page


  • 1403

Volume


  • 15

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • This paper presents a new strengthening technique for square-reinforced concrete (RC) columns by

    circularisation with reactive powder concrete (RPC) and wrapping with fibre-reinforced polymer (FRP).

    RC column specimens were tested, divided into four groups of four specimens based on the strengthening

    technique: four reference square specimens (150mm side length) without any strengthening,

    four were wrapped with two layers of carbon fibre-reinforced polymer (CFRP) and the remaining eight

    were strengthened by changing the square cross-section to a 240mm diameter circle with RPC jacket.

    Four of the RPC jacketed specimens were left unwrapped, while the last four were wrapped with two

    layers of CFRP. From each group, one specimen was tested under concentric axial load, two were

    tested under eccentric axial load and one was tested under four-point bending. It was found that

    using the RPC for circularisation and strengthening of existing square RC columns is an effective technique

    to significantly increase their axial carrying capacity, ultimate flexural load and energy absorption.

    Wrapping the circularised RC columns with CFRP prevented the failure of the RPC jacket at the

    corners of the existing square RC columns under the axial load, and improved the ultimate load as

    well as the energy absorption of the circularised RC columns.

Publication Date


  • 2019

Citation


  • Algburi, A. H. M., Sheikh, M. Neaz. & Hadi, M. N. S. (2019). New technique for strengthening squarereinforced concrete columns by the circularisation with reactive powder concrete and wrapping with fibre-reinforced polymer. Structure and Infrastructure Engineering: maintenance, management, life-cycle design and performance, 15 (10), 1392-1403.

Scopus Eid


  • 2-s2.0-85067333847

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/3808/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/2799

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1392

End Page


  • 1403

Volume


  • 15

Issue


  • 10

Place Of Publication


  • United Kingdom