Experimental validation of a shape memory alloy retrofitting application

AlSaleh, Raed; Casciati, Fabio; El-Attar, Adel; El-Habbal, I.

doi:10.1177/1077546311399946

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…In the earthquake of 2000, the structure showed good hysteretic properties and was not damaged. Similar SMA-based reinforcement cases for ancient buildings are the Badia Fiorentina Bell Tower in Italy and the Sherith Israel building restoration project in San Francisco, USA [ 158 ]. They were not destroyed in subsequent earthquakes and showed good hysteretic properties.…”

Section: Practical Engineering Applications Of Smamentioning

confidence: 99%

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Xu,

Zhu,

Zhao

et al. 2024

Materials

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Shape memory alloy (SMA), a type of smart material, is widely used in the design of reinforcement and repair, isolation, and shock absorption of building structures because of its outstanding characteristics, such as the shape memory effect (SME), superelasticity (SE), and high damping. It not only improves the bearing capacity, ductility, and mechanical properties of the structural components of buildings but can also effectively slow down the strong response of engineering structures under the effect of an earthquake. It plays a key role in energy dissipation and shock absorption as well as sustainable development. To promote the application of SMA in building structures, this paper summarizes the research on the use of SMA as a reinforcing material in building structures, including work related to SMA material characteristics and types, SMA-reinforced structural components, and SMA isolation devices. In addition, the shortcomings of SMA applications in building structures are analyzed, and valuable suggestions for future research methods are put forward. SMA has been applied to engineering practice in the form of embedded and external reinforcement, which shows that it has broad application prospects in future buildings.

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Section: Practical Engineering Applications Of Smamentioning

confidence: 99%

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Xu,

Zhu,

Zhao

et al. 2024

Materials

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“…A chain of numerical tests was undertaken to estimate the efficacy of the constitutive models. AlSaleh et al (2012) experimentally studied the effect of pre-stressed SMA wires on the dynamics of an SDOF SMA oscillator. Free vibration tests were carried out on the oscillator before and after attaching SMA wires.…”

Section: Introductionmentioning

confidence: 99%

Force transmissibility characteristics of a pseudoelastic oscillator

Jose

Chakraborty

Bhattacharyya

2019

Journal of Intelligent Material Systems and Structures

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The force transmissibility characteristics of a passive vibration isolator in the form of shape memory alloy bar are investigated. The shape memory alloy bar, together with a rigid mass, constitutes a single-degree-of-freedom system. The force isolation ability of the oscillator is evaluated for both isothermal and convective environmental conditions. The transmissibility curve of an isothermal pseudoelastic oscillator displays single and double jumps depending upon the forcing amplitude. The shape memory alloy oscillator with coupled thermomechanical behaviour depends on the cooling rate near resonant frequencies. Increased cooling rate reduces both peak amplitude and the resonant frequency of the transmissibility curve. The force isolation provided by shape memory alloy oscillator is independent of the operating conditions.

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“…Moreover, the self-centering capability can also be enhanced by increasing the initial prestressing of the SMA tendon. The performance of SMA wire or prestressed cable for repairing and retrofitting purpose has been investigated by AlSaleh et al (2012). Recently, Ozbulut et al (2015) studied the cyclic behavior of NiTi PT tendons.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of using reduced length superelastic shape memory alloy strands in post-tensioned steel beam–column connections

Chowdhury

Rahmzadeh

Moradi

et al. 2018

Journal of Intelligent Material Systems and Structures

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Driven by a need to reduce repair costs and downtime in structures following a major earthquake, self-centering systems have been introduced. Post-tensioned high strength steel strands have shown promising results in providing self-centering capability in steel frames, where the beams are compressed to columns. This study aims at investigating the feasibility of using reduced length of steel and shape memory alloy strands in steel beam–column connections. Through finite element modeling, the study first evaluates the effect of using short-length regular post-tensioned strands in steel connections. The results show higher strength, stiffness, and energy dissipation capacity for connections with shorter length regular post-tensioned strands. The moment capacity and energy absorption capacity of a post-tensioned beam–column connection with one-third strand length were 105% and 114% higher than those of with full-length strands, respectively. However, residual drifts increased from 4 to 39 mm. To avoid loss in the re-centering capability of such connections due to yielding/failing of post-tensioned steel strands, the application of shape memory alloy and hybrid strands are proposed. The results show that shorter length shape memory alloy strands are effective in regaining self-centering and dissipating higher amount of energy compared to the full-length steel strands.

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Experimental validation of a shape memory alloy retrofitting application

Cited by 12 publications

References 10 publications

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Force transmissibility characteristics of a pseudoelastic oscillator

Feasibility of using reduced length superelastic shape memory alloy strands in post-tensioned steel beam–column connections

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