Pilot Study for Investigating the Cyclic Behavior of Slit Damper Systems with Recentering Shape Memory Alloy (SMA) Bending Bars Used for Seismic Restrainers
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TLDR
In this paper, the authors proposed an alternative recentering device characterized by smart structures, which mitigate the damage for such steel energy dissipation slit dampers, by implementing superelastic shape memory alloy (SMA) bending bars in parallel motion with the steel energy-dissipating damper.Abstract:
Although the steel slit dampers commonly utilized for aseismic design approach can dissipate considerable energy created by the yielding of base materials, large residual deformation may happen in the entire frame structure. After strong external excitation, repair costs will be incurred in restoring a structure to its original condition and to replace broken components. For this reason, alternative recentering devices characterized by smart structures, which mitigate the damage for such steel energy dissipation slit dampers, are developed in this study. These devices, feasibly functioning as seismic restrainers, can be improved by implementing superelastic shape memory alloy (SMA) bending bars in a parallel motion with the steel energy-dissipating damper. The bending bars fabricated with superelastic SMAs provide self-centering forces upon unloading, and accordingly contribute to reducing permanent deformation in the integrated slit damper system. The steel slit dampers combined with the superelastic SMA bending bars are evaluated with respect to inelastic behavior as simulated by refined finite element (FE) analyses. The FE slit damper models subjected to cyclic loads are calibrated to existing test results in an effort to predict behavior accurately. The responses of the proposed slit damper systems are compared to those of the conventionally used slit damper systems. From the analysis results, it is concluded that innovative steel slit dampers combined with superelastic SMA bending bars generate remarkable performance improvements in terms of post-yield strength, energy dissipation, and recentering capability.read more
Citations
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Welding and Joining of NiTi Shape Memory Alloys: A Review
TL;DR: In this article, a detailed review of welding and joining processes applied to NiTi, in similar and dissimilar combinations considering both fusion and solid-state processes, is presented, and a special section is devoted to this technique.
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Recent advances in the applications of shape memory alloys in civil infrastructures: A review
TL;DR: This review reveals the significance of SMA in civil infrastructures particularly, the enhancement of structural behavior and energy dissipation of external excitation, particularly seismic loads.
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Behavior and application of self-centering dampers equipped with buckling-restrained SMA bars
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Seismic loss assessment of a structure retrofitted with slit-friction hybrid dampers
Jinkoo Kim,Hyungjun Shin +1 more
TL;DR: In this article, a hybrid energy dissipation device is developed by combining a steel slit plate and friction pads to be used for seismic retrofit of structures, and its effectiveness is investigated by comparing the life cycle costs of the structure before and after the retrofit.
References
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Book
Engineering Aspects of Shape Memory Alloys
TL;DR: An introduction to martensite and shape memory, CMWayman and TWDuerig shape memory and transformation behavior of mariensitic Ti-Pd-Ni andTi-Pt-Ni alloys, PGLindquit and CMMayman the mechanical aspects of constrained recovery, JLProft and TWduerig the design of electrical interconnection systems with shape memory alloys as mentioned in this paper, ECydzik actuator and work production devices.
Journal ArticleDOI
Applications of shape memory alloys in civil structures
Gangbing Song,N. Ma,Hong-Nan Li +2 more
TL;DR: Shape memory alloy (SMA) is a novel functional material and has found increasing applications in many areas and has been extended to using SMA for control of civil structures as mentioned in this paper.
Journal ArticleDOI
Seismic demands on steel braced frame buildings with buckling-restrained braces
TL;DR: In this paper, the seismic response of three and six story concentrically braced steel frames utilizing buckling-restrained braces is investigated and detailed nonlinear dynamic analyses are performed for specific cases as well as statistically for several suites of ground motions in order to characterize the effect on key response parameters.
Journal ArticleDOI
Cyclic properties of superelastic shape memory alloy wires and bars
TL;DR: In this article, the authors evaluated the properties of superelastic Ni.Ti shape memory alloys under cyclic loading to assess their potential for applications in seismic resistant design and retrofit.
Journal ArticleDOI
Implementation and testing of passive control devices based on shape memory alloys
TL;DR: In this article, two families of passive seismic control devices exploiting the peculiar properties of shape memory alloy (SMA) kernel components have been implemented and tested within the MANSIDE project (Memory Alloys for New Seismic Isolation and Energy Dissipation Devices).