Experimental and analytical studies on flexural behavior of composite bridge decks with orthotropic steel deck and ultra-high-performance concrete (UHPC) slab under negative moment

Yizhi Bu, Mingzhe Li, Chuan Wei, Zhenyu Cheng, Chuang Cui, Yi Bao

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Ultra-high-performance concrete (UHPC) has been used to enhance the mechanical behavior of orthotropic steel bridge decks through steel-UHPC composite actions. This research develops a method to evaluate the flexural behavior of steel-UHPC composite sections via experimental and analytical investigations. Four composite deck specimens were fabricated and tested to study the mechanical behaviors under negative moment along the transverse and the longitudinal directions. A polyline model is proposed to link the strain, crack width of UHPC, and the bearing capacity of steel-UHPC composite decks, considering the crack behavior of UHPC with different fiber contents. The polyline model is used to derive engineer-friendly formulae for the flexural behavior of composite decks. Results showed that the proposed method provided adequate predictions for the flexural behavior of composite decks in the evolution of the crack width in UHPC with different fiber contents.

Original languageEnglish
Article number115190
JournalEngineering Structures
Volume274
DOIs
StatePublished - 1 Jan 2023

Keywords

  • Composite decks
  • Crack width
  • Flexural behavior
  • Mechanical model
  • Three-point polyline model
  • Ultra-high-performance concrete (UHPC)

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