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EFFECT OF CORROSION ON THE SOIL STRUCTURE INTERACTION OF CSP CULVERTS
Session: Transportation and Linear Infrastructure II / Transports et infrastructures linéaires II
Alex Campbell, Dalhousie University (Canada)
Hany El Naggar, Associate Professor, Department of Civil and Resource Engineering, Dalhousie University (Canada)
Adequate long-term performance of buried culvert structures depends in part on the durability of the steel in service. In some cases, culverts may experience degradation when exposed to chloride-contaminated groundwater. This paper presents a three-dimensional finite element model to examine the influence of corrosion on the stability of circular corrugated steel culverts. The geometrical and material details of the backfill, as well as the construction process, culvert geometry, and earth and vehicle loads were considered in the model. A new approach to account for the effects of backfill compaction is introduced. The culvert behaviour was simulated using a non-linear finite element model (FEM) that accounts for soil-structure interaction and the non-linear stress-strain response of the soil and steel. The non-linear FEM was used to calculate structural forces in culverts with local corroded areas and that are subjected to standard truck loads.
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