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Condition factor for seismic performance of deteriorated bridges

Condition factor for seismic performance of deteriorated bridges  Bridges located at moderately or highly aggressive environments can be subjected to different levels of deterioration. Deterioration can be observed as cracking or spalling of concrete and corrosion of reinforcement. Among them corrosion of reinforcement is the main concern in capacity reduction due to loss of steel area and reduction in yield strength. Corrosion may even induce total collapse of bridge. In many cases, reinforced concrete bridges constructed over rivers exposed to reinforcement corrosion at splash zone of pier. Service life of these deteriorated bridges can be reduced significantly due to some loss in load carrying capacity which can also negatively affect the future seismic performance. Focus of these research has been given to investigate reduction of capacity in seismic behavior of bridges subjected to moderately aggressive environmental effects and to propose a condition factor to be used in future bridge analysis. Different deterioration models have been studied and a proper model has been modified to estimate loss in load capacity for a series of standard highway bridges. A condition factor, representing an equivalent deterioration, has been proposed for evaluation and design of bridges at moderately aggressive environment. Use of such condition factor in design can compensate future loss in capacity resulting some overdesign at early years of bridge. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bridge Structures IOS Press

Condition factor for seismic performance of deteriorated bridges

Ocak, E. Canan; Caner, Alp
Bridge Structures , Volume 15 (4): 10 – Dec 31, 2019
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Publisher
IOS Press
Copyright
Copyright © 2019 © 2019 – IOS Press and the authors. All rights reserved
ISSN
1573-2487
eISSN
1744-8999
DOI
10.3233/BRS-190160
Publisher site
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Abstract

 Bridges located at moderately or highly aggressive environments can be subjected to different levels of deterioration. Deterioration can be observed as cracking or spalling of concrete and corrosion of reinforcement. Among them corrosion of reinforcement is the main concern in capacity reduction due to loss of steel area and reduction in yield strength. Corrosion may even induce total collapse of bridge. In many cases, reinforced concrete bridges constructed over rivers exposed to reinforcement corrosion at splash zone of pier. Service life of these deteriorated bridges can be reduced significantly due to some loss in load carrying capacity which can also negatively affect the future seismic performance. Focus of these research has been given to investigate reduction of capacity in seismic behavior of bridges subjected to moderately aggressive environmental effects and to propose a condition factor to be used in future bridge analysis. Different deterioration models have been studied and a proper model has been modified to estimate loss in load capacity for a series of standard highway bridges. A condition factor, representing an equivalent deterioration, has been proposed for evaluation and design of bridges at moderately aggressive environment. Use of such condition factor in design can compensate future loss in capacity resulting some overdesign at early years of bridge.

Journal

Bridge Structures – IOS Press

Published: Dec 31, 2019

References

  • Empirical modeling of indicators of chloride-induced rebar corrosion
    Ahmad
  • Factors controlling cracking of concrete affected by reinforcement corrosion
    Alonso
  • Cover cracking as a function of bar corrosion: Part I-Experimental test
    Andrade
  • Identifying bridge rehabilitation needs using an analytical method developed for interpretation of visual inspection data
    Avsar
  • Environmental effects on cover cracking due to corrosion
    Balafas