Breaking wire detection and strain distribution of seven-wire steel cables with acoustic emission and optical fiber sensors.

Details

• Creators:
  Ge, Maochen
• Corporate Creators:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Cable stayed bridges
  • Wire
  • Bridge cables
  • Strain (Mechanics)
  • Acoustic emission
  • Optical fibers
  • Sensors
  • Fracture mechanics
  • Deformation curve
• Publication/ Report Number:
  NUTC R305 ; Project # 00040017
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Abstract:
  Cable-stayed bridges have been increasingly used as river-crossing links in highway and railway transportation networks. In the event ; of an abnormal situation, they can not only impact the local and national economy but also threaten the safety of passengers. To assess ; the structural condition of cables, the strain distribution among multiple wires must be effectively determined as one or more wires are ; broken due to overstress and/or corrosion. This proposal is focused on a preliminary study of wire breakage detection and associated ; strain redistribution. The specific objectives are to develop and validate a new algorithm for the localization of broken wires with ; acoustic emission technology and a new model for the determination of strain redistribution with distributed optical fiber sensor ; measurements. Both laboratory tests and numerical simulations will be conducted to understand the mechanism of strain redistribution ; as a result of wire breakage. In particular, a seven-wire steel cable will be tested and analyzed to take into account both the initial ; stress due to wire twisting and the friction effect between wires. For sensitivity study, various section losses in percentage of sectional ; area will be considered to understand the effective length of a cable over which the strain condition prior to the loss of wire sections ; can be recovered.
  More +
• Format:
  PDF
• Funding:
  DTRT06-G-0014
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27947/dot_27947_DS1.pdf
• File Type:
  [PDF - 181.81 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:add345ee3c03b600c00ffefc33e872f7d8e788e5394bd07f9d2aeebfe2d4b880