A novel response-amplified shape memory alloy-based damper: Theory, experiment and numerical simulation

Kong, Sihua; Zhao, Guifeng; Ma, Yuhong; Cai, Xiaojun; Yang, Zhenyu; Liu, Wei; Xie, Lili

doi:10.1016/j.soildyn.2023.108291

Cited by 3 publications

(1 citation statement)

References 70 publications

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“…The energy propagating through the soil into the structure can be partially dissipated rather than converted into deformation. Several strategies exist to maximize damping, either through deliberate design of stationary structures and materials [5][6][7][8][9], or via the employ of dynamic absorber devices (active or passive) which make use of moving parts to counter-balance incoming vibrations [10][11][12]. On the other hand, natural dissipation phenomena are always present in any structure.…”

Section: Introductionmentioning

confidence: 99%

Study of Damping of Bare and Encased Steel I-Beams Using the Thermoelastic Model

Carvalho

2023

Buildings

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Steel I-beams are a fundamental structural component in civil construction. They are one of the main load-bearing components in a building that must withstand both the structure and any incoming external perturbations, such as seismic events. To avoid damage to the structure, the building must be designed to dissipate the maximum amount of energy possible. One way energy can be dissipated is through internal or structural damping, of which thermoelasticity is one of the causes, especially in low-frequency harmonic excitations. The main goal of this study is to analyze the amount of damping in an I-beam generated by thermoelasticity and when encased in a Portland cement concrete layer, using a Finite Element model. It was found that, due to the geometry of the I-Beam, the damping coefficient as a function of frequency has two local maxima, as opposed to the traditional single maximum in rectangular beams. Encasing an I-beam in a concrete layer decreases the overall damping. While the extra coating protects the beam, the reduction in damping leads to a lower energy dissipation rate and higher vibration amplitudes.

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Section: Introductionmentioning

confidence: 99%

Study of Damping of Bare and Encased Steel I-Beams Using the Thermoelastic Model

Carvalho

2023

Buildings

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Design, Manufacturing, and Testing of a Non‐Preload Variable Friction Damper for Seismic Application of Buildings

Liu,

Kong,

Zhao

et al. 2024

Structural Control and Health Monitoring

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Friction dampers are widely used due to their simple structure, remarkable energy dissipation capacity, and frequency independence. However, existing friction dampers are prone to relaxing the preload force during long‐term service, which can lead to cold bonding or cold solidification. To overcome this critical shortcoming, a novel non‐preload variable friction damper (NVFD) was firstly proposed. The construction of the proposed NVFD is provided in detail. Furthermore, restoring the force model through the amplification factors of friction force and inertial mass was derived based on the principle of the proposed NVFD. Then, pseudo‐static tests with various parameters were conducted. Finally, a single‐degree‐of‐freedom (SDOF) structure was employed to compare the effectiveness of this paper’s new NVFD with a conventional friction damper (FD) under various earthquake levels. The results show that non‐preload characteristics avoided the problems of large preloads by traditional friction dampers; thus, the NVFD had stable and reliable variable friction performance, which can effectively adapt to different hazard levels.

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Structural analysis of the dynamic response of a shape memory alloy based damper

Thiebaud,

Ben Zineb

2024

Journal of Vibration and Control

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Shape memory alloys (SMAs) are promising candidates for use in sensors, actuators, or passive dampers. This paper investigates the dynamic response of a superelastic NiTi holed disk to assess its damping performance relative to frequency and temperature for SMA-based damper applications. This study involved several key steps. Initially, the superelastic behavior of the SMA was experimentally characterized through tensile tests. This testing campaign provided the required data to identify material parameters of a thermomechanical constitutive model, already implemented in the finite element code Abaqus. Using the identified parameters, a finite element based structural analysis was conducted to predict the disk’s operational range, ensuring it remained within the superelastic domain without incurring potential damage. Following this static analysis, a dynamic mechanical analysis (DMA) was performed on the disk. By employing a complex stiffness approach, we further examined the disk’s damping effects. This dynamic method enabled a detailed description of the apparent stiffness and damping characteristics based on solicitation frequency, test temperature, vibration amplitude, and a predefined static displacement. The results indicated a clearly predominant structural effect over the phase transformation effect, despite the disk’s substantial damping potential.

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A novel response-amplified shape memory alloy-based damper: Theory, experiment and numerical simulation

Cited by 3 publications

References 70 publications

Study of Damping of Bare and Encased Steel I-Beams Using the Thermoelastic Model

Study of Damping of Bare and Encased Steel I-Beams Using the Thermoelastic Model

Design, Manufacturing, and Testing of a Non‐Preload Variable Friction Damper for Seismic Application of Buildings

Structural analysis of the dynamic response of a shape memory alloy based damper

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