Development of shape memory alloy damper for intelligent bridge systems

Yukio Adachi, Shigeki Unjoh

Research output: Contribution to journalConference articlepeer-review

33 Citations (Scopus)


The application of intelligent materials with self-repairable and self-diagnosis functions will provide more efficient and effective earthquake protective system to bridge structures. Shape memory alloys are possible candidates of intelligent materials that are applicable to bridge structures. The damping device made of shape memory alloys that can absorb seismic energy and reduce the seismic force by its pseudo yield effect was proposed. The device also enables the bridge to set again to the original position by its shape memory effects or self-centering effect even if residually displaced. This study focuses on the damping effect of shape memory alloys and verified its effect. First, the experiment to obtain the force-displacement relationship of the proposed damping device was carried out in the Martensite and Austenite phases so that the effect were verified in the shape memory phase and super elastic phase. A series of shaking table test were also carried out in order to verify the effect under earthquake type shaking. As a result of this study, the shape memory alloy damper device performs its function more efficient and effective when designed in shape memory phase.

Original languageEnglish
Pages (from-to)31-42
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1999
Externally publishedYes
EventProceedings of the 1999 Smart Structures and Materials - Smart Systems for Bridges, Structures, and Highways - Newport Beach, CA, USA
Duration: 1999 Mar 11999 Mar 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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