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Torbol, Marco
Reliability & Risk Assessment Laboratory (R2A lab)
Research Interests
  • Reliability analysis, probabilistic safety assessment, probabilistic risk assessment,structural health monitoring, system identification, damage assessment

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Fragility Analysis of Highway Bridges Based on Long-Term Monitoring Data

Cited 4 times inthomson ciCited 2 times inthomson ci
Title
Fragility Analysis of Highway Bridges Based on Long-Term Monitoring Data
Author
Torbol, MarcoGomez, HugoFeng, Maria
Keywords
Fragility analysis; Fragility curves; Long term monitoring; Material property; Seismic risk assessment; Structural health monitoring systems; Structural parameter; Track changes; Transportation network; Vibration data
Issue Date
2013-03
Publisher
WILEY-BLACKWELL
Citation
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, v.28, no.3, pp.178 - 192
Abstract
In the probabilistic seismic risk assessment of highway transportation networks, fragility curves are used to represent the vulnerability of a bridge. Because these networks have hundreds or thousands of bridges, it is not possible to study each bridge individually. Instead, bridges with similar properties are grouped together and are represented by the same fragility curve. However, this approach may be inadequate at times for different reasons. For instance, bridges with similar geometrical and material properties could have different age and/or could deteriorate at a different rate. Moreover, certain bridges are unique such as a cable stayed bridge or a suspension bridge. In this study, fragility curves are calculated based not only on the geometry and material properties but also on vibration data recorded by a structural health monitoring system. The fragility curves are used to track changes of the structural parameters of a bridge throughout its service life. Based on vibration data the fragility curves are updated reflecting a change in structural parameters. Fragility curves based on vibration data, whenever these are available, represent the vulnerability of a bridge with greater accuracy than fragility curves based only on the geometry and material properties. This article demonstrates the applicability of structural health monitoring to generate more reliable fragility curves. This is useful not only for bridges that are unique, which are usually the first to be instrumented, but for every instrumented bridge as well.
URI
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DOI
10.1111/j.1467-8667.2012.00805.x
ISSN
1093-9687
Appears in Collections:
UEE_Journal Papers
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