EXAMPLE OF A CABLE STAYED BRIDGE MONITORING

In the LCPC research project on fatigue in stay cables, experimental and numerical studies were promoted for defining more rigorous assessment methods. The Bourgogne bridge at Chalon-sur-Saone was chosen as an experimental bridge and has been the subject of different measurements actions. Their objectives were to simultaneously measure tension variations and "deck/stay-cable" rotations near the anchorage for the longest stay-cables. Good agreements between measurements and computations were found during the first measurement campaigns. These results led to the conclusion that the data acquisition system was reliable, and that the numerical models were sufficiently precise for later use. The instrumentation was therefore pursued after putting the bridge into service. A new monitoring system was then designed to get a more complete information under real traffic conditions. This new system is based on the concept of smart sensors which allows to perform local numerical data treatments, to modify the data treatment program, to use only one data line and to provide data in digital format reducing the loss of information. This new system was designed to provide data histograms, minima and maxima histograms and rainflow histograms. The paper recalls the first objectives of the instrumentation and of the major results obtained from the first measurement campaigns. Then, the new monitoring system is described emphasising its advantages and its drawbacks. Its istallation on the bridge, the problems met in the development of this system and some results are also presented. For the covering abstract see IRRD E104152.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Publication Date: 1999

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00788381
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2841-5
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM