Mechanical properties of superelastic Cu-Al-Be wires at cold temperatures for the seismic protection of bridges

Yunfeng Zhang, Joseph A. Camilleri, Songye Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)

Abstract

This paper examines the suitability of superelastic copper-aluminum- beryllium (Cu-Al-Be) alloy wires for the seismic protection of bridges in cold regions. Experimental results for the mechanical properties of superelastic Cu-Al-Be alloy wires at a variety of temperatures and loading rates are presented. This research is motivated by the recent use of shape memory alloys for bridge restrainers subject to harsh winter conditions, especially in cold regions. Bridge restrainers made of superelastic Cu-Al-Be wire strands are expected to be used for protecting bridge decks from excessive displacement when subjected to strong earthquakes. Using a temperature chamber, superelastic Cu-Al-Be wires with a diameter of 1.4 mm were tested under uniaxial cyclic loading at various loading rates and cold temperatures. The test results from 23 to -50°C demonstrate that Cu-Al-Be exhibits superelastic behavior at cold temperatures down to -85°C. It is also found that with decreasing temperature the transformation plateau stress is reduced while its fatigue life increases under cyclic testing.
Original languageEnglish
Article number025008
JournalSmart Materials and Structures
Volume17
Issue number2
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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