Energy Dissipation in Shape Memory Alloy Devices

Casciati, Fabio; Faravelli, Lucia; Petrini, Lorenza

doi:10.1111/0885-9507.00121

Cited by 24 publications

(7 citation statements)

References 9 publications

(10 reference statements)

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“…The typical stress-strain response of the SMA loaded in the austenite phase exhibits hysteretic loop that has a flag-like shape, and brings the effects of energy dissipation and damping while still keeping its original shape. Many researchers have studied such phenomena for applications in civil structures such as dampers, base isolation devices, restrainers, and reinforcement for concrete [1,2,6,10,12,13,19,20,24,27 among many others].…”

Section: Background On Shape Memory Alloysmentioning

confidence: 99%

Sustainability of civil infrastructure using shape memory technology

Jung

Zafar²,

Andrawes

2017

Innov. Infrastruct. Solut.

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The last few decades have clearly demonstrated the vulnerability of our civil infrastructure systems to problems like aging, natural, and man-made hazards including earthquakes, hurricanes, blasts, etc. The conventional materials such as steel and concrete have proven to be limited in terms of their ability to withstand the extreme demands imposed on them by modern societies. The limitations in currently used construction materials combined with the consistently growing population worldwide present new challenges and demands for researchers in the field of structural engineering. Hence, there is an urgent need for new materials that are capable of extending the service life of structures with minimal or no need for maintenance or repairs against natural and manmade hazards. Shape memory alloy (SMA) is a class of ''Smart Materials'' that have recently emerged as potential construction material with unique thermomechanical properties, namely shape memory effect and superelasticity. Two applications of SMAs in civil structures are discussed in this paper. The first application involves the use of SMA in performing seismic rehabilitation of RC bridge columns that lack flexural ductility. In this application, SMA is used in the form of thermally prestressed spirals that can apply large active confinement pressure to the columns at their plastic hinge regions to improve their flexural ductility. The experimental results of large scale shake table tests performed on two RC columns, one of which is retrofitted with SMA are discussed. The results demonstrate the great ability of SMA spirals in mitigating the damage even under strong levels of ground shaking. The second application focuses on utilizing superelastic SMA fibers as reinforcement for polymeric composite bars. The newly developed composite material is named SMAFiber Reinforced Polymer (SMA-FRP), and is studied as seismic reinforcing bars for moment resisting concrete frames. The results of nonlinear time history analysis prove that using SMA-FRP bars at the plastic hinge regions of the frames helps significantly in limiting the residual drifts and enhancing the energy dissipation of the frames.

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Section: Background On Shape Memory Alloysmentioning

confidence: 99%

Sustainability of civil infrastructure using shape memory technology

Jung

Zafar²,

Andrawes

2017

Innov. Infrastruct. Solut.

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“…The SMA energy dissipation devices have been seen in the forms of braces for framed structures [3,15,7,8,29,11,36,34,1,32,13], dampers for cable-stayed bridges [21] or simply supported bridges [6,2], connection elements for columns [35,36,20] and retrofitting devices for historic buildings [17,5]. Experiments or simulations or both have been carried out to explore the potentials of the SMA-based energy dissipation devices in passive structure control.…”

Section: Sma Energy Dissipation Devicesmentioning

confidence: 99%

“…Casciati et al [2] studied the application of the large martensite Nitinol bar in seismic protection devices for bridges. They used a finite element model (FEM) to analyze both static and dynamic response of the devices to strong earthquakes.…”

Section: B Sma Damping Elements For Bridgesmentioning

confidence: 99%

Review of Applications of Shape Memory Alloys in Civil Structures

Song

2004

Engineering, Construction, and Operations in Challenging Environments

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Shape memory alloy (SMA) is a novel functional material and has found increasing applications in many areas. Recently, research efforts have been extended to using SMA for control of civil structures. This paper presents a review of applications of the SMA materials for passive, active and semi-active controls of civil structures. First, an overview of the characteristics of SMA is presented. The shape memory effect (SME) and pseudoelasticity, two major properties of SMA associated with the thermal-induced or stress-induced reversible hysteretic phase transformation between austenite and martensite, are reviewed. These unique properties enable SMA to be used as actuators, passive energy dissipators and dampers for civil structure control. This paper then reviews current research using SMA-based devices for passive, semi-active or active control of civil structures. The operation mechanism, design and experimental results of these SMA-based devices are also presented in the paper.

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“…In order to mitigate the vibration of bridge decks, SMA has been proposed as a limiting device at the bridge deck supports [1], or in the base isolation system [2]. Research on the SMA materials for vibration reduction of bridges and its effectiveness has been conducted by several authors [3,4]. It is known that most of the methods and strategies can restrain the vibration only in a single direction and that it is very difficult to reduce the torsional vibration of girder bridges and to overcome the overturning problem of bridge decks under serious overloading or eccentric loading.…”

Section: Introductionmentioning

confidence: 99%

06.06: Vibration reduction of steel girder bridges: Using shape memory alloy cables

Liu

et al. 2017

ce papers

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Torsional vibration caused by moving vehicle loads traversing a steel girder bridge is likely to cause the traffic safety and people comfort problems. This paper investigates the use of cables made of shape memory alloy as the devices of reduction of torsional vibration for steel girder bridges. The shape memory alloy cables are featured by their small volume and expedient installation. To investigate their effect on the vibration of girder bridges, numerical simulation and experimental study are carried out. The results of torsional vibration obtained by finite element simulations are compared with the experimental ones from model testing. The finite element results have good correlation with the experimental counterparts. Comparisons have shown that the finite element model for torsional vibration of steel girder bridges with the shape memory alloy cables being treated as dampers can be used to predict the effects of shape memory alloy cables on the vibration reduction. The finite element and experimental results have shown that shape memory alloy cables can effectively reduce torsional vibrations of steel girder bridges.

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Energy Dissipation in Shape Memory Alloy Devices

Cited by 24 publications

References 9 publications

Sustainability of civil infrastructure using shape memory technology

Sustainability of civil infrastructure using shape memory technology

Review of Applications of Shape Memory Alloys in Civil Structures

06.06: Vibration reduction of steel girder bridges: Using shape memory alloy cables

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