Evaluation method of post-repair performance of corrosion-damaged steel pipe piles by patch plate repair

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This study investigates the effect of surface roughness on repair performance of steel patch plate repair and CFRP bonding repair for corroded steel pipe piles by numerical analysis. Load carrying capacity of corrosion-damaged pipe piles varies depending on surface roughness characteristics even though the average thickness is the same. However, the variation of load carrying capacity due to surface roughness is less after those piles are repaired. As for CFRP bonding repair, surface roughness at the thickness-reduced portion will lead to increased stress, resulting in a larger required thickness of CFRP than the case without the surface roughness.