Tensile performance of toughness enhanced interfaces for steel-UHPC composite bridge decks

In this study, direct tensile tests and tensile-shear coupling tests were conducted on a series of steel-UHPC composite specimens with various toughness-enhanced interfaces. The effects of tough fibers and quartz particles on the tensile behavior of the bonding interface between steel and UHPC were investigated. The failure modes, fracture energy and strength of different interfaces were determined. The results indicate that the use of tough fibers for toughening the bonding interface (ES interface) can significantly improve the fracture energy, while the interface strength is somewhat reduced. Compared to the epoxy-bonded interface and the quartz particle interface, the tensile strength of the ES interface decreased by 47.7 % and 55.3 %, respectively, while the fracture energy of the ES interface increased by 70.9 times and 85.8 times, respectively. The variation in fiber configuration results in a maximum difference of 40.5 % in the tensile strength of the ES interfaces. Increasing the epoxy bonding layer thickness from 2 mm to 3 mm in the ES interface leads to a 14.3 % decrease in the tensile strength and a 44.8 % decrease in fracture energy. The tensile toughening mechanism of the ES interface was analyzed, and a tensile capacity model was proposed with a deviation within the range of −13.6–9.0 %. Finally, the tensile-shear failure criterion of the ES interface was clarified through a tensile-shear coupling analysis.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.138355
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061824034974
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Zou, Yang
  • Zhou, Xiang
  • Jiang, Jinlong
  • Yang, Jun
  • Zhang, Zhongya
  • 0000-0002-9645-8299
  • Liu, Le
• Publication Date: 2024-10-25

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 138355
• Serial:
  • Construction and Building Materials
  • Volume: 449
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Bridge decks; Composite structures; Steel; Tension tests; Toughness; Ultra high performance concrete
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 01933824
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 16 2024 9:12AM