CAPACITY LOSS DUE TO CORROSION IN STEEL-GIRDER BRIDGES

In this study, a model of deteriorating capacity was developed by combining information on the location and rate of corrosion with the structural analysis of corroded members. The model was used to evaluate two typical structures in a corrosive environment. It was found that the detrimental effect of corrosion varies with the mode of resistance. Reduction of capacity occurs faster for modes which depend on thin elements, particularly those in compression. Thus, the modes of resistance that govern the design of a new bridge may not be the same as those which govern when the bridge is old. It was found that buckling of the web is the critical mode of failure for a 40-ft bridge, wheras bearing is not as important for a 60-ft bridge, because of a larger web thickness. If a steel bridge will not receive proper maintenance and painting, it should be constructed with bearing stiffeners.

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  • Accession Number: 00486398
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Aug 31 1989 12:00AM