Abstract
Owing to their high strength to cost ratio, corrugated metal pipes (CMPs) are well accepted among professionals for accommodating water runoff under roadways and railroads. Installed CMPs reach various states of deterioration over their service life resulting in diminishing strength. This can result in a sudden collapse of the CMP and thus, poses a risk of traffic disruption and a threat to public safety. To restore the capacities of aging CMPs, appropriate rehabilitation methods are required after relevant condition assessment techniques are utilized for projecting service life. This paper presents a multiphysics simulation study to assess the structural performance of new, deteriorated, and rehabilitated CMPs in buried conditions. The validity of the developed model was obtained by comparing simulation results with previously conducted full-scale tests. This study investigated performance improvement by two trenchless rehabilitation techniques – cured-in-place-pipe (CIPP) and sliplining with high-density polyethylene (HDPE) liner. The deflections obtained from the simulations under various static surface loads are also compared with values computed using the Modified IOWA equation. The results demonstrate that the deflections obtained by the numerical model offer better agreement with full-scale tested CMP deflections than does the Modified IOWA equation.
Published Version
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