Abstract
This study investigates the bond behavior of steel H-pile encased in concrete jackets under push-out loading, considering the effects of concrete type and embedment length. Nine full-scale specimens were tested using three concrete types: ultra-high-performance concrete (UHPC), Methyl Methacrylate Polymer Concrete (MMA-PC), and conventional concrete (CC), with embedment lengths of 63.5 mm, 127 mm, and 190.5 mm. The experimental results revealed that MMA-PC jacket demonstrated the highest bond strength, though gains were marginal beyond 127 mm. UHPC exhibited superior tensile strength and ductility, preventing splitting failure. UHPC also displayed the highest interfacial fracture energy of 9.63 N/mm, exceeding MMA-PC and CC by 1.27 and 34.6 times, respectively. Design equations predicting the interfacial fracture energy derived from the proposed bond stress-slip model showed strong correlation with the experimental result, providing a reliable framework for designing concrete jacket repairs for corroded steel H-piles.
Recommended Citation
B. Shrestha et al., "Comparative Study of Interfacial Bond Strength of Steel H-pile with Ultra-high Performance and Polymer Concrete Jacket," Engineering Structures, vol. 343, article no. 120976, Elsevier, Nov 2025.
The definitive version is available at https://doi.org/10.1016/j.engstruct.2025.120976
Department(s)
Civil, Architectural and Environmental Engineering
Publication Status
Full Text Access
Keywords and Phrases
Axial load; Bond strength; Concrete jackets; Fracture energy; Methyl methacrylate polymer concrete (MMA-PC); Push-out test; Repair technique; Steel bridge columns; Ultra-high performance concrete (UHPC)
International Standard Serial Number (ISSN)
1873-7323; 0141-0296
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
15 Nov 2025
Comments
Missouri Department of Transportation, Grant None