304325

The influence of SMA on reinforced concrete column

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Last updated: 05 Jan 2025

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Abstract

  In recent years, a novel concrete confinement technique employing shape-memory alloys (SMAs) has emerged. The new method employs active confinement, which has been shown to increase the strength and ductility of concrete more effectively than passive confinement. However, previous research on this technique has primarily focused on using external SMA spirals or ties to retrofit or repair existing concrete columns. Due to SMA's unique ability to recover substantial inelastic deformation upon unloading, seismic design can greatly benefit from it. Consequently, if shape memory alloy (SMA) is utilized at the location of plastic hinges with the proper design constraints, the structure will dissipate the demand energy and return to its original form when unloaded. Self-centering, SMA-reinforced concrete beam-column connections are a novel concept that can be improved for application in building. Utilizing SMA in numerous reinforcement applications: In addition to the material's super-elasticity, corrosion resistance, and fatigue resistance, the shape memory effect, which is the ability of SMA to return to its original shape after being heated and bent beyond its elastic limits, is SMA's defining characteristic. This transition's recuperated strain can replace hydraulic jacks in pre-stressing applications. Attaching pre-stressed SMA reinforcement to RC members and then heating them above the activation temperature enables the SMA to recover the inelastic strain, thereby subjecting the RC to a pre-stress.

DOI

10.21608/jessit.2023.304325

Keywords

SMA, COLUMNS, Self-centering, Reinforced concrete

Authors

First Name

Mahmoud

Last Name

Kamal

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Affiliation

Assistant Professor, Civil Engineering Department, Faculty of Engineering, Beni-Suef University, Egypt.

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Volume

1

Article Issue

2

Related Issue

42001

Issue Date

2023-05-01

Receive Date

2023-06-19

Publish Date

2023-05-01

Page Start

27

Page End

30

Print ISSN

2974-4504

Online ISSN

2974-4490

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https://jessit.journals.ekb.eg/article_304325.html

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https://jessit.journals.ekb.eg/service?article_code=304325

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304,325

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Journal

Publication Title

Journal of Engineering Science and Sustainable Industrial Technology

Publication Link

https://jessit.journals.ekb.eg/

MainTitle

The influence of SMA on reinforced concrete column

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Article

Created At

20 Dec 2024