Advances in Bridge Engineering (Aug 2024)

Mechanical properties of a novel friction dampers incorporated with buckling restrained shape memory alloy bars

  • Weifeng Yang,
  • Sasa Cao,
  • Wenxian Liu,
  • Xinzhi Dang

DOI
https://doi.org/10.1186/s43251-024-00133-5
Journal volume & issue
Vol. 5, no. 1
pp. 1 – 16

Abstract

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Abstract To improve the energy dissipation and self-resetting ability of bridge structures under strong earthquakes, a new buckling-restrained SMA bar-based friction damper (SFD) is proposed. The damper is composed of buckling-restrained super-elastic SMA bars, friction pads, and a steel frame. The buckling-restrained SMA bars provide self-reset capability, while the friction pads provide additional energy dissipation capacity. Firstly, the configuration, working mechanism, and restoring force model of the SMA bar-based friction damper are introduced. Secondly, a specimen of the damper is made, and the pseudo-static test is carried out. Finally, the experimental results are analyzed based on the Abaqus finite element model. The results indicate that the damper has better self-resetting ability and energy dissipation capacity.

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