Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys

Raj Suhail, Daniel McCrum, Giuseppina Amato, Jian Fei Chen

Research output: Contribution to conferencePaper

Abstract

In recent years, shape memory alloys (SMAs) have received increased attention in the field of civil engineering due to their unique features such as; superelasticity (SE), shape memory effect (SME), high ductility and good corrosion resistance. In this study, these unique features are utilized in a seismic retrofitting of a reinforced concrete external beam column joint. The efficacy of the retrofitting scheme was experimentally tested under cyclic loading on a full-scale beam column joint representative of pre-1970’s (non-seismically designed) construction practice. Reinforced concrete beam-column joints of this period are typically deficient in joint core shear reinforcement. The retrofitting strategy utilized the ability of pre-strained SMA wires in constrained conditions to generate a significant amount of recovery stress (prestress) when heated above the transformation temperature. Essentially, the prestress force achieved in the wires when the phase is changed in the SMA wire are to be used to actively confine the reinforced concrete beam-column joint.

Original languageEnglish
Publication statusPublished - Jun 2018
Event16th European Conference on Earthquake Engineering - Thessaloniki Concert Hall, Thessaloniki, Greece
Duration: 18 Jun 201821 Jun 2018
Conference number: 16
http://www.16ecee.org/

Conference

Conference16th European Conference on Earthquake Engineering
Abbreviated title16ECEE
CountryGreece
CityThessaloniki
Period18/06/201821/06/2018
Internet address

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Shape memory effect
Reinforced concrete
Retrofitting
Testing
Wire
Civil engineering
Ductility
Corrosion resistance
Reinforcement
Recovery
Temperature

Keywords

  • Shape memory alloys, Heat activated prestressing, Active confinement of Concrete, beam-column joints

Cite this

Suhail, R., McCrum, D., Amato, G., & Chen, J. F. (2018). Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys. Paper presented at 16th European Conference on Earthquake Engineering, Thessaloniki, Greece.
Suhail, Raj ; McCrum, Daniel ; Amato, Giuseppina ; Chen, Jian Fei. / Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys. Paper presented at 16th European Conference on Earthquake Engineering, Thessaloniki, Greece.
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Suhail, R, McCrum, D, Amato, G & Chen, JF 2018, 'Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys', Paper presented at 16th European Conference on Earthquake Engineering, Thessaloniki, Greece, 18/06/2018 - 21/06/2018.

Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys. / Suhail, Raj; McCrum, Daniel; Amato, Giuseppina; Chen, Jian Fei.

2018. Paper presented at 16th European Conference on Earthquake Engineering, Thessaloniki, Greece.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys

AU - Suhail, Raj

AU - McCrum, Daniel

AU - Amato, Giuseppina

AU - Chen, Jian Fei

PY - 2018/6

Y1 - 2018/6

N2 - In recent years, shape memory alloys (SMAs) have received increased attention in the field of civil engineering due to their unique features such as; superelasticity (SE), shape memory effect (SME), high ductility and good corrosion resistance. In this study, these unique features are utilized in a seismic retrofitting of a reinforced concrete external beam column joint. The efficacy of the retrofitting scheme was experimentally tested under cyclic loading on a full-scale beam column joint representative of pre-1970’s (non-seismically designed) construction practice. Reinforced concrete beam-column joints of this period are typically deficient in joint core shear reinforcement. The retrofitting strategy utilized the ability of pre-strained SMA wires in constrained conditions to generate a significant amount of recovery stress (prestress) when heated above the transformation temperature. Essentially, the prestress force achieved in the wires when the phase is changed in the SMA wire are to be used to actively confine the reinforced concrete beam-column joint.

AB - In recent years, shape memory alloys (SMAs) have received increased attention in the field of civil engineering due to their unique features such as; superelasticity (SE), shape memory effect (SME), high ductility and good corrosion resistance. In this study, these unique features are utilized in a seismic retrofitting of a reinforced concrete external beam column joint. The efficacy of the retrofitting scheme was experimentally tested under cyclic loading on a full-scale beam column joint representative of pre-1970’s (non-seismically designed) construction practice. Reinforced concrete beam-column joints of this period are typically deficient in joint core shear reinforcement. The retrofitting strategy utilized the ability of pre-strained SMA wires in constrained conditions to generate a significant amount of recovery stress (prestress) when heated above the transformation temperature. Essentially, the prestress force achieved in the wires when the phase is changed in the SMA wire are to be used to actively confine the reinforced concrete beam-column joint.

KW - Shape memory alloys, Heat activated prestressing, Active confinement of Concrete, beam-column joints

M3 - Paper

ER -

Suhail R, McCrum D, Amato G, Chen JF. Testing Of Reinforced Concrete External Beam-column Joints Retrofitted With Shape Memory Alloys. 2018. Paper presented at 16th European Conference on Earthquake Engineering, Thessaloniki, Greece.