Shape memory alloy-spring damper for seismic control and its application to bridge with laminated rubber bearings

This study introduces a shape memory alloy (SMA)-spring damper which is composed of SMA bars and elastic springs arranged in perpendicular. The damper depicts a curved flag-shape hysteretic behavior that is endowed with self-centering capacities and large deformation capabilities but uses reduced amount of SMA material. A design procedure is proposed to apply the SMA-spring damper to the bridge with laminated rubber bearings which would slide under seismic excitations. Analytical results validate the effectiveness of SMA-spring dampers in seismic control of the bridge: (1) The damper provides trivial stiffness to the bridge at small displacement, and the isolation efficiency of the bridge is maintained; (2) large horizontal force is provided for the structures at large deformation of the bearings, which alleviates the excessive displacement of bearings and prevents span collapse; and (3) the damper helps recenter the bearings and reduce the residual displacement of the bridge.

• Record URL:
  https://doi.org/10.1177/13694332211033955
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/13694332
• Supplemental Notes:
  • © The Author(s) 2021.
• Authors:
  • Cao, Sasa
  • Yi, Jiang
  • 0000-0001-8341-5903
• Publication Date: 2021-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 3550-3563
• Serial:
  • Advances in Structural Engineering
  • Volume: 24
  • Issue Number: 15
  • Publisher: Sage Publications, Incorporated
  • ISSN: 1369-4332
  • Serial URL: http://journals.sagepub.com/home/ase

Subject/Index Terms

• TRT Terms: Alloys; Bridge bearings; Dampers; Earthquake resistant design
• Subject Areas: Bridges and other structures; Highways; Materials;

Filing Info

• Accession Number: 01778718
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 5 2021 9:20AM