United States Department of Transportation
i
Performance of Corroded Piles Subjected to Eccentric Loads Before and After Repair – Phase III
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2024-09-01
[PDF-3.86 MB]
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Edition:Final Report January 2020 – December 2021
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Abstract:H-Piles are a well-known method used to support bridges because they have a small cross-section relative to their capacity. Steel H-piles have various levels of corrosion caused by environmental conditions; therefore, there is an urgent need to determine the residual axial capacity of corroded H-piles. Most design manuals allow some tolerance for eccentricities during pile-loading, which might cause a significant drop in corrosion. This report presents the results of four full-scale Hpiles tested with two eccentric loads of 10% and 30%. Corrosion was simulated using mechanical reduction in the thickness, cuts in the flanges, and webs of the piles. The axial strengths of the piles were calculated using the design procedures of the American Institute of Steel Construction (AISC). This report describes experimental and numerical pushout testing of the previously corroded H-piles embedded into concrete-filled FRP jackets. Different repair techniques and types of different FRP jackets, confinement ratios, and head stud stiffnesses were investigated. The report results revealed that eccentricity reduced the capacity of the corroded piles, especially for piles with severe corrosion in the form of cuts and voids in the flanges and web, respectively. Moreover, the repair method using CFRP jackets with mounted head studs significantly increased the axial strength capacity of the repaired corroded piles.
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