Self-centering capacity of RC columns with smart plastic hinges of martensitic NiTi SMA bars

E Choi, JS Jeon, JH Lee - Smart Materials and Structures, 2023 - iopscience.iop.org
The objective of this study was to examine the self-centering capacity of reinforced concrete
(RC) columns with martensitic shape memory alloy (SMA) bars in the plastic hinge region …

A State-of-the-Art Review on Shape Memory Alloys (SMA) in Concrete: Mechanical Properties, Self-Healing Capabilities, and Hybrid Composite Fabrication

H Qian, M Umar, MNA Khan, Y Shi, A Manan… - Materials Today …, 2024 - Elsevier
Abstract This review explores Shape Memory Alloy Fibers (SMAF) as a promising
reinforcement for concrete structures, particularly in earthquake zones. Limited …

On the efficiency of induced prestressing in SMA mortar beams through different thermal stimuli

E Choi, A Ostadrahimi, JH Lee… - Smart Materials and …, 2022 - iopscience.iop.org
This paper investigates the efficiency of prestressing effect on the flexural performance of
reinforced mortar beams through different heating methods. To this end, different specimens …

Enhancement of compressive strength and strain ductility of SMA fiber reinforced concrete considering fiber's aspect ratios

E Choi, A Ostadrahimi, WJ Kim - Construction and Building Materials, 2022 - Elsevier
In this study, the effect of recovery stress on the toughness of cementitious materials was
investigated using randomly distributed SMA fibers in concrete. The composite was …

Investigation of flexural behavior of crimped SMA fiber-reinforced mortar beams through experimental study and mesoscale finite element modeling

BT Nhan, E Choi, JS Jeon - Construction and Building Materials, 2024 - Elsevier
This study examined the influence of the volume fraction, distribution, and orientation of
crimped shape memory alloy (SMA) fibers on the flexural behavior of mortar beams through …

On the performance of a smart hybrid damper consisting of shape memory alloy and steel rings

E Choi, BT Nhan, A Ostadrahimi - Engineering Structures, 2023 - Elsevier
This study investigated the performance of hybrid rings used as a smart damper made by
shape memory alloy (SMA) as well as steel rings. The aim of the SMA ring was to provide …

High recovery stress performance of NiTi shape memory alloy with a wide temperature window

C Yang, T Liu, M Zhong, Z Wu, J Deng, Y Du - Journal of Materials …, 2023 - Springer
The prestressing applications of shape memory alloys (SMAs) employs the recovery stress
of a constrained SMA element that originates from its attempt to revert a pre-deformation to …

Enhancement of recovery stress by annealing and prestraining of NiTiNb wires

C Yang, T Liu, M Zhong, Z Wu… - Journal of Intelligent …, 2023 - journals.sagepub.com
NiTiNb shape memory alloy has attracted much attention for its use in prestressing and
remedying structural steel and concrete members due to its unique shape memory effect …

An analytical study on SMA beam-column actuators for anti-buckling phenomenon

A Ostadrahimi, F Taheri-Behrooz, E Choi… - International Journal of …, 2024 - Elsevier
The present paper focuses on studying the anti-buckling behavior of prismatic martensitic
shape memory alloy (SMA) beam-columns. It combines analytical and semi-analytical …

[HTML][HTML] Active SMA Fibers' Effect on the Pullout Behavior of a Steel Bar Embedded in Concrete

E Choi, BT Nhan, J Choi - Materials, 2023 - mdpi.com
This study investigated the bond behavior and radial crack between concrete and
reinforcing bars using cold-drawn shape memory alloy (SMA) crimped fibers controlled by …