Shape memory alloy plates: Cyclic tension-release performance, seismic applications in beam-to-column connections and a structural seismic demand perspective

Zhou, Xuhong; Ke, Ke; Yam, Michael C.H.; Zhao, Qi; Huang, Yun; Di, Jin

doi:10.1016/j.tws.2021.108158

Cited by 48 publications

(8 citation statements)

References 48 publications

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“…Murasawa et al (2006) first carried out tensile tests on SMA plates, and confirmed the strong link between inhomogeneous deformation behavior and macroscopic deformation behavior when they are subjected to cyclic loading. Zhou et al (2021) examined the tension-release behavior of SMA flat plates, with particular focus of their potential applications in beam-tocolumn connections. A similar study was conducted by Wu et al (2022) who focused on timber connections.…”

Section: Sma Flat Platesmentioning

confidence: 99%

Emerging superelastic SMA core damping elements for seismic application

Fang

Yam²

2023

Front. Built Environ.

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Structural and non-structural damage reported after recent strong earthquakes promotes a fundamental shift in structural design target from “collapse resistance” to “fast structural function recovery”. A unique class of metal called superelastic shape memory alloy (SMA) has been emerging as a promising solution to enhance the seismic resilience of structures. SMA core damping elements are the basic constituents of many newly-proposed seismic resistant members or devices, and they are directly responsible for the safety, integrity, and economical efficiency of the structures using them. This mini-review paper offers a comprehensive summary of the emerging SMA core damping elements recently developed, covering SMA monofilament wires, fibers, bars, flat plates, U-shaped plates, angles, cables, rings, helical springs, disc springs, and friction springs. These SMA core elements are suitable for various seismic application scenarios, and their efficiency have been verified through either full-scale or proof-of-concept experimental studies. The basic working principles, advantages, and potential shortcomings of these elements are discussed, and future research needs are outlined.

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Section: Sma Flat Platesmentioning

confidence: 99%

Emerging superelastic SMA core damping elements for seismic application

Fang

Yam²

2023

Front. Built Environ.

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“…Shape Memory Alloys (SMA) possess unique shape memory effects and superelastic properties, with a recoverable plastic strain of up to 14% of their initial length [6]. Among them, superelastic SMA can produce superelasticity induced by stress and exhibit significant hysteresis energy dissipation characteristics, which are highly suitable for seismic structures [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Yang

Zhong

et al. 2023

Preprint

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Although SMA/PVA hybrid fiber reinforced cementitious composites (SMA/PVA-ECC) exhibit excellent crack closure and deformation recovery capabilities, the research on their fundamental mechanical properties is still limited. This study investigates the tensile mechanical properties of SMA/PVA-ECC materials by conducting uniaxial tensile tests, analyzing the failure behavior, stress-strain curves, and characteristic parameters of the specimens, comparing the influence of SMA fiber content and diameter, and establishing a tensile constitutive model. The results show that the residual crack width of SMA/PVA-ECC specimens significantly decreases after unloading, and the SMA fiber content and diameter have a significant impact on the tensile properties of the specimens. The comprehensive tensile properties of specimens with a fiber diameter of 0.2 mm and content of 0.2% are the best, with their initial cracking strength, ultimate strength, and strain increasing by 56.4%, 23.6%, and 13.4%, respectively, compared to ECC specimens. The proposed bilinear tensile constitutive model has high accuracy. This study provides a theoretical basis for further research on SMA/PVA-ECC materials.

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“…Superelastic shape memory alloys (SMA), i.e., alloys with significant deformation reversal potential, can be an ideal option since they offer a spectrum of structural material properties [33] that can suitably increase the strength and resilience of joints. Investigations on the employment of SMA as a strengthening element of concrete members have hence been intensified in the last years [34][35][36][37][38]. A comprehensive overview of the application of SMA in civil infrastructures, including steel, concrete, and timber structures, is offered by Zareie et al [39], for strengthening and repair applications for concrete structures in [40], and in a review from the perspective of multifunctional properties of the alloy by Abavisani et al [41].…”

Section: Introduction 1motivation Fundamental Principles and Backgrou...mentioning

confidence: 99%

Minimally Invasive Retrofitting of RC Joints with Externally Applied SMA Plate—Adaptive Design Optimisation through Probabilistic Damage Simulation

2023

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Beam–column joints are the critical section of many reinforced concrete (RC) structure types in which any failure could lead to the collapse of the entire structure. This paper attempts to employ a superelastic shape memory alloy plate as an innovative and adaptive external strengthening element to rehabilitate existing concrete beam–column joints and enhance the structure’s performance. An experimentally investigated beam–column joint is used as the case study, and it is investigated numerically to validate the effects of an innovative strengthening technique based on shape memory alloys. The results show that the proposed technique could increase the joint’s stiffness and reduce the risk of overall failure. A particular innovation in the proposed method is associated with the novel material itself but also with the fact that the increased potential costs of using special alloys are counteracted by its potential to produce these elements in an optimised industrially produced fastened plate. This fits-all construction product further allows a rapid and minimally invasive strengthening technique. Moreover, to achieve this, the plate is adaptively designed against random critical load combinations through probabilistic damage prediction.

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Shape memory alloy plates: Cyclic tension-release performance, seismic applications in beam-to-column connections and a structural seismic demand perspective

Cited by 48 publications

References 48 publications

Emerging superelastic SMA core damping elements for seismic application

Emerging superelastic SMA core damping elements for seismic application

Mechanical Properties of SMA/PVA-ECC under Uniaxial Tensile Loading

Minimally Invasive Retrofitting of RC Joints with Externally Applied SMA Plate—Adaptive Design Optimisation through Probabilistic Damage Simulation

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