Remote monitoring of fatigue-sensitive details on bridges : [part I and II].

Attanayake, Upul; Aktan, Haluk; Hay, Robert; Catbas, Necati; Western Michigan University. Dept. of Civil and Construction Engineering

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Remote monitoring of fatigue-sensitive details on bridges : [part I and II].

2015-03-01
By Attanayake, Upul ; Aktan, Haluk ; Hay, Robert ; ...

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Details:

Creators:

Attanayake, Upul ; Aktan, Haluk ; Hay, Robert ; Catbas, Necati

Attanayake, Upul ; Aktan, Haluk ; Hay, Robert ; Catbas, Necati Less -
Corporate Creators:

Western Michigan University. Dept. of Civil and Construction Engineering
Subject/TRT Terms:

[+]

Acoustic Emission Cluster Analysis Fatigue (Mechanics) Finite Element Method Remote Sensing Steel Bridges Structural Health Monitoring Waveform Analysis
Publication/ Report Number:

RC-1629
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Michigan. Dept. of Transportation. Office of Research Administration
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:

PDF
Alternate URL:

http://ntl.bts.gov/lib/54000/54900/54956/RC1629_Part_II_486744_7.pdf ; http://ntl.bts.gov/lib/54000/54900/54956/RC1629_Appendices_486745_7.pdf ;
Funding:

2010-0297
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:8d286bc8b421971766aedeab556c396b718748eef97796955ccf83478f5a6352
Download URL:

https://rosap.ntl.bts.gov/view/dot/28786/dot_28786_DS1.pdf
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Remote monitoring of fatigue-sensitive details on bridges : [part I and II].

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