Bridge fatigue damage evaluation and updating using non-destructive inspections

Zhengwei Zhao, Achintya Haldar

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

A method is proposed to mitigate fatigue damage using information from non-destructive inspections. In spite of improvements in the design of fatigue-sensitive structures, periodic non-destructive inspections are still required by the profession. A linear elastic fracture mechanics-based reliability model is proposed which incorporates uncertainties from many different sources, including uncertainty in the results obtained from the non-destructive inspections. Regardless of whether or not it detects any cracks, each inspection provides additional information and the underlying fatigue reliability needs to be updated after each inspection. The updated information on the reliability can be used as a decision making tool as what to do next, in terms of whether to do nothing, reschedule the next inspection at an earlier date, or repair or replace the structure immediately. The application potential of the method is demonstrated with the help of examples. It is shown that the proposed method is much superior to the current S-N curve-based AASHTO method and can be used as an alternative to it.

Original languageEnglish (US)
Pages (from-to)775-788
Number of pages14
JournalEngineering Fracture Mechanics
Volume53
Issue number5
DOIs
StatePublished - Mar 1996

Fingerprint

Fatigue damage
Inspection
Fatigue of materials
Periodic structures
Fracture mechanics
Repair
Decision making
Cracks

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Bridge fatigue damage evaluation and updating using non-destructive inspections. / Zhao, Zhengwei; Haldar, Achintya.

In: Engineering Fracture Mechanics, Vol. 53, No. 5, 03.1996, p. 775-788.

Research output: Contribution to journalArticle

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