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Application of magnetoelastic stress sensors in large steel cables

  • Wang, Guodun (Department of Civil and Materials Engineering, the University of Illinois at Chicago) ;
  • Wang, Ming L. (Department of Civil and Materials Engineering, the University of Illinois at Chicago) ;
  • Zhao, Yang (Department of Civil and Materials Engineering, the University of Illinois at Chicago) ;
  • Chen, Yong (Department of Civil Engineering, Zhejiang University) ;
  • Sun, Bingnan (Department of Civil Engineering, Zhejiang University)
  • Received : 2005.03.28
  • Accepted : 2006.01.12
  • Published : 2006.04.25

Abstract

In this paper, the application of magnetoelasticity in static tension monitoring for large steel cables is discussed. Magnetoelastic (EM) stress sensors make contact-free tension monitoring possible for hanger cables and post-tensioned cables on suspension and cable-stayed bridges. By quantifying the correlation of magnetic relative permeability with tension and temperature, the EM sensors inspect the load levels in the steel cables. Cable tension monitoring on Qiangjiang (QJ) 4th Bridge demonstrates the reliability of the EM sensors.

Keywords

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