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 language | English |
|---|---|
| Article number | 115190 |
| Journal | Engineering Structures |
| Volume | 274 |
| DOIs | |
| State | Published - 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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