Integrity monitoring of fracture critical bridges

Branko Glišić, Daniele Inaudi

Research output: Contribution to journalArticle

Abstract

Many bridges worldwide are approaching the end of their lifespan and it is necessary to assess their health condition in order to mitigate risks, prevent disasters, and plan maintenance activities in an optimized manner. The fracture critical bridges are of particular interest since they have only little or no load path redundancy. Structural health monitoring (SHM) recently emerged as a branch of engineering with a great potential to help the assessment of structural condition. Distributed optical fibre sensing technology has opened a new possibility in structural health monitoring. Distributed deformation sensor (sensing cable) is sensitive at each point of its length to strain changes and cracks. Such a sensor practically monitors one-dimensional strain field and can be installed over all the length of monitored structural members (suspension cables, girders, etc.), and therefore provide for integrity monitoring, i.e. for direct detection and characterisation (including recognition, localization, and quantification or rating) of local strain changes generated by damage. Integrity monitoring principle for bridges is developed and presented in this paper. Finally, a large scale real on-site application is briefly presented.

Original languageEnglish (US)
Pages (from-to)135-141
Number of pages7
JournalStructural Integrity and Life
Volume10
Issue number2
StatePublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Metals and Alloys

Keywords

  • Bridge
  • Distributed Sensor
  • Fracture
  • Structural Health Monitoring

Fingerprint Dive into the research topics of 'Integrity monitoring of fracture critical bridges'. Together they form a unique fingerprint.

  • Cite this