United States Department of Transportation
i
Behavior and Repair of Corroded Steel H-Piles – Phase I (Axial Behavior) [supporting datasets]
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2019-05-23
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[PDF-139.04 KB]
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Abstract:This report summarizes the details of an experimental work and finite element modeling that were conducted to evaluate: 1) the remaining axial capacity of steel H-piles having different corrosion severity and extension levels, and 2) the performance of repaired corroded steel H-piles. The research consisted of 32 short steel H-piles (10 × 42) encased in different types of concrete including conventional concrete, high strength concrete, high-early strength concrete, and geopolymer concrete. Different embedment lengths and shear studs were used. Thirteen long steel H-piles (10 × 42) were milled to represent the loss of cross-sectional area associated with corrosion and tested under concentric and eccentric axial loads. Different corrosion levels and patterns were considered. According to the obtained and observed results from the test, the axial capacity of the concentrically loaded corroded H-piles decreases as the corrosion severity increases. Both the FEMs and experimental work showed that the buckling load is more susceptible to corrosion in the flanges. The length of the corroded region had no effect on the axial load capacity. Increasing the concrete compressive strength increased the bond strength. Furthermore, implementing different concrete jackets types was successful in producing compressive strengths similar to those of the conventional concrete. Using the CFRP jackets without headed studs slightly increased the bond stress between the concrete jackets and steel piles. Using headed studs and CFRP jackets increased the bond strength between the jackets and steel piles by a range of 580% to 1,130%, compared to the reference specimen. Using headed studs considerably increased the bond strength between the concrete jackets and steel piles.
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