Experimental study of non-circular concrete elements actively confined with shape memory alloy wires

Qiwen Chen; Moochul Shin; Bassem Andrawes

doi:10.1016/j.conbuildmat.2014.02.076

Experimental study of non-circular concrete elements actively confined with shape memory alloy wires

Qiwen Chen, Moochul Shin, Bassem Andrawes

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This study focuses on developing a novel scheme for applying external active confinement to non-circular concrete elements that lack ductility using shape memory alloys (SMAs). A total of 13 concrete elements (prisms) are tested under monotonic and cyclic uniaxial compression load. The compressive stress-strain relationships of the SMA confined concrete elements are examined and compared with the behaviors of elements confined with conventional glass fiber reinforced polymer (GFRP) jackets. The results clearly show a significant improvement in the ultimate strain and residual (post-peak) strength of concrete elements actively confined with SMA compared to that of GFRP confined elements.

Original language	English (US)
Pages (from-to)	303-311
Number of pages	9
Journal	Construction and Building Materials
Volume	61
DOIs	https://doi.org/10.1016/j.conbuildmat.2014.02.076
State	Published - Jun 30 2014

Keywords

Active confinement
Concrete
Ductility
Recovery stress
Shape memory alloys

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Online availability

10.1016/j.conbuildmat.2014.02.076

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title = "Experimental study of non-circular concrete elements actively confined with shape memory alloy wires",

abstract = "This study focuses on developing a novel scheme for applying external active confinement to non-circular concrete elements that lack ductility using shape memory alloys (SMAs). A total of 13 concrete elements (prisms) are tested under monotonic and cyclic uniaxial compression load. The compressive stress-strain relationships of the SMA confined concrete elements are examined and compared with the behaviors of elements confined with conventional glass fiber reinforced polymer (GFRP) jackets. The results clearly show a significant improvement in the ultimate strain and residual (post-peak) strength of concrete elements actively confined with SMA compared to that of GFRP confined elements.",

keywords = "Active confinement, Concrete, Ductility, Recovery stress, Shape memory alloys",

author = "Qiwen Chen and Moochul Shin and Bassem Andrawes",

note = "Funding Information: The authors acknowledge the support from the National Science Foundation through its Faculty Early Career Development (CAREER) program under Award No. 1055640 . Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

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AU - Chen, Qiwen

AU - Shin, Moochul

AU - Andrawes, Bassem

N1 - Funding Information: The authors acknowledge the support from the National Science Foundation through its Faculty Early Career Development (CAREER) program under Award No. 1055640 . Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 2014/6/30

Y1 - 2014/6/30

N2 - This study focuses on developing a novel scheme for applying external active confinement to non-circular concrete elements that lack ductility using shape memory alloys (SMAs). A total of 13 concrete elements (prisms) are tested under monotonic and cyclic uniaxial compression load. The compressive stress-strain relationships of the SMA confined concrete elements are examined and compared with the behaviors of elements confined with conventional glass fiber reinforced polymer (GFRP) jackets. The results clearly show a significant improvement in the ultimate strain and residual (post-peak) strength of concrete elements actively confined with SMA compared to that of GFRP confined elements.

AB - This study focuses on developing a novel scheme for applying external active confinement to non-circular concrete elements that lack ductility using shape memory alloys (SMAs). A total of 13 concrete elements (prisms) are tested under monotonic and cyclic uniaxial compression load. The compressive stress-strain relationships of the SMA confined concrete elements are examined and compared with the behaviors of elements confined with conventional glass fiber reinforced polymer (GFRP) jackets. The results clearly show a significant improvement in the ultimate strain and residual (post-peak) strength of concrete elements actively confined with SMA compared to that of GFRP confined elements.

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KW - Concrete

KW - Ductility

KW - Recovery stress

KW - Shape memory alloys

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Experimental study of non-circular concrete elements actively confined with shape memory alloy wires

Abstract

Keywords

ASJC Scopus subject areas

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