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Steel and Composite Structures Volume 32, Number 3, August10 2019 , pages 373-388 DOI: https://doi.org/10.12989/scs.2019.32.3.373 |
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Pilot study for investigating the inelastic response of a new axial smart damper combined with friction devices |
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Nadia M. Mirzai and Jong Wan Hu
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| Abstract | ||
| This study proposes a new concept of an axial damper using the combination of shape memory alloy (SMA), friction devices, and polyurethane springs. Although there are many kinds of dampers to limit the damages, large residual deformation may happen and it causes much repairing cost for restoring the structure to the initial position. Also in some of the dampers, a special technology for assembling and fabricating is needed. One of the most important advantages of this damper is the ability to remove all the residual deformation using SMA plates and simple assembling without any special technology to fabricate. In this paper, four different dampers (in presence or omission of friction devices and polyurethane springs) are investigated. All four cases are analyzed in ABAQUS platform under cyclic loadings. In addition, the SMA plates are replaced by steel ones in four cases, and the results are compared to the SMA dampers. The results show that the axial polyurethane friction (APF) damper could decrease the residual deformation effectively. Also, the damper capacity and dissipated energy could be improved. The analysis showed that APF damper is a good recentering damper with a large amount of energy dissipation and capacity, among others. | ||
| Key Words | ||
| smart material; shape memory alloy (SMA); damper; residual deformation; finite element analysis | ||
| Address | ||
| (1) Nadia M. Mirzai: School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran; (2) Nadia M. Mirzai: Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam; (3) Jong Wan Hu: Department of Civil and Environmental Engineering, Incheon National University, Incheon 22012, South Korea; (4) Jong Wan Hu: Incheon Disaster Prevention Research Center, Incheon National University, Incheon 22012, South Korea. | ||