Welcome to ROSA P |
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Remote monitoring of fatigue-sensitive details on bridges : [part I and II].
  • Published Date:
    2015-03-01
  • Language:
    English
Filetype[PDF-6.28 MB]


This document cannot be previewed automatically as it exceeds 5 MB
Please click the thumbnail image to view the document.
Remote monitoring of fatigue-sensitive details on bridges : [part I and II].
Details:
  • Publication/ Report Number:
  • Resource Type:
  • Geographical Coverage:
  • Abstract:
    Fatigue is one of the most critical problems for steel bridges as well as for any steel structures that needs

    to be considered during design and operation. The objectives of this study are to explore monitoring

    technologies, and to develop effective structural and data analysis strategies as well as implementation

    recommendations for evaluating performance of fatigue-sensitive details and retrofits in steel bridges.

    Acoustic emission (AE) was selected as a candidate inspection technology, and a monitoring system was

    installed on a bridge. In general, the performance of the monitoring system and associated software is

    satisfactory. The majority of AE monitoring challenges are associated with AE data analysis and

    interpretation of results. In this study, cluster analysis and non-linear mapping signal analysis techniques

    are used to group AE data with similar waveform characteristics. The presence of the signals that

    resemble the characteristics of crack opening signals, noise, and structural resonance is identified through

    waveform analysis. Once the presence of crack opening signals is confirmed, the source location plots

    are utilized to assess the concentration and the level of activity at the locations of interest.

    A significant difference is observed in the fatigue life calculated using measured stress, and the stresses

    calculated using finite element models loaded with a fatigue truck. Hence, a two-tier implementation

    process is recommended. Tier I process includes the assessment of bridges with repaired details. Tier II

    process recommends evaluating the entire bridge population with fatigue-sensitive details. Additional

    recommendations include implementing AE data interpretation capability in an on-line system to provide

    reliable input with minimal interpretation requirements for inspection-based maintenance management.

  • Format:
  • Funding:
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like:
Submit Feedback >