Experimental Investigation of Super-Elastic Semi-Active Damping for Seismically Excited Structures

Shook, D.; Roschke, Paul N.; Lin, Po Ting; Loh, Chin‐Hsiung

doi:10.1061/41000(315)26

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…However, walls with steel reinforcement had more energy dissipation capacity. Nevertheless, due to the drawbacks and shortcomings of SMA, in many studies, hybrid systems using energy dissipators such as hysteretic, viscous, and frictional dampers are considered [133,135,136].…”

Section: Mechanical Devices For Self-centeringmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

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The primary seismic force-resisting system (SFRS) in middle- to high-rise reinforced concrete (RC) building structures often includes coupled shear walls (CSWs) and single shear walls (SSWs). These walls are designed to transfer lateral forces to the foundation and dissipate energy through the development of plastic hinges. The latter lead to residual displacement in these structural components. On the other hand, self-centering systems enable the structures to return to their initial position after severe loading or at least reduce residual displacement. The objectives of this study were, therefore, as follows: (i) to review the state of the art on shear wall self-centering techniques and retrofitting methods based on externally bonded fiber-reinforced polymer (EB-FRP); (ii) to evaluate research needs to improve the self-centering ability of shear walls using EB-FRP.

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Section: Mechanical Devices For Self-centeringmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

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“…In 2008, Shook et al [14,15] investigated the behavior of a superelastic semi-active damping system which incorporates SMA wires with magnetorheological (MR) dampers. Zhu and Zhang [16,17] proposed a selfcentering friction damping brace which is capable of re-centering through SMA strands and features enhanced energy dissipation capacity through friction.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of braced frames with shape memory alloy and energy-absorbing hybrid devices

Yang

DesRoches

Leon

2010

Engineering Structures

166

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“…Shook et al (2008Shook et al ( , 2009 investigated the behavior of a super-elastic semi-active damping system which incorporates SMA wires with magnetorheological (MR) dampers in a combinational sense. Zhang (2007, 2008) proposed a self-centering friction damping brace which is capable of re-centering itself through SMA strands and features enhanced energy dissipation capacity through friction.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Static and Dynamic Tests of a Smart Hybrid Brace

Yang

DesRoches²,

Leon³

2012

Structures Congress 2012

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This paper presents results from two experimental programs of quasi-static testing and dynamic testing which investigate the re-centering and energy-dissipating behavior of a one-tenth-scale smart hybrid brace. Smart hybrid braces, that tend to prevent a soft-story mechanism, restore the original configuration and can be rapidly rehabilitated, are composed of three main components: (1) a set of superelastic shape memory alloy (SMA) wires anchored in a re-centering mechanism, (2) two struts with energy-absorbing capabilities, and (3) two high-strength steel tubes to guide the movement of the smart hybrid brace. A prototype smart hybrid brace was designed in compliance with the optimal proportion design methodology. The 1/10-scale smart hybrid brace was fabricated according to the similarity rules and then was tested in a uniaxial MTS 810 material testing machine. When the smart hybrid brace without the energy-dissipation struts was conducted under a series of quasi-statically cyclic tests, a double-flag-shaped hysteresis was clearly revealed. Subsequently, the energy-dissipation aluminum struts were added into the hybrid brace and then the same low-frequency cyclic tests was performed until the SMA strain approached the design strain limitation of 6%. The maximum residual displacement, 0.02 in, is smaller than the reverse transformation yield displacement of 0.03 in, meeting the proposed design concept. The hysteretic response in the last cycle exhibits a similar double-flag shape with nearly zero residual displacement, indicating that both the recentering SMA-wire mechanism and brace main body in the smart hybrid brace remain intact. The smart hybrid brace was further tested using dynamic loading with a frequency of 0.25 Hz. The dynamic results reveal a similar hysteresis to that under the quasi-static tests, except for the increased strain hardening. These tests reveal the features of the smart hybrid braces -repeatable SMA wire recentering mechanism and replaceable energy-dissipation components.

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Experimental Investigation of Super-Elastic Semi-Active Damping for Seismically Excited Structures

Cited by 5 publications

References 15 publications

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Design and analysis of braced frames with shape memory alloy and energy-absorbing hybrid devices

Quasi-Static and Dynamic Tests of a Smart Hybrid Brace

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