Application of Lightweight Steel-Plate–Reinforced Ribbed UHPC Deck Panel in a Long-Span Suspension Bridge
Publication: Journal of Bridge Engineering
Volume 29, Issue 2
Abstract
To improve the crack resistance of ultrahigh-performance concrete (UHPC) waffle deck panels, this paper introduces a neotype lightweight steel-plate–reinforced ribbed UHPC deck panel including T-shaped joints based on its first application on a two-pylon suspension bridge, the Qinglong Island Bridge. Finite-element analyses (FEA) optimized the deck geometry in terms of the maximum tensile UHPC stress and deflection attributed to service loads. The experimental tests investigated the crack behavior using strip deck specimens derived from four tension zones of the deck panel. The FEA results demonstrated that placing exterior steel plates underneath the longitudinal ribs reduced the maximum tensile UHPC stress by 40.5%–42.5%. Moreover, eliminating transverse ribs did not significantly compromise the structural performance due to the one-way slab; the maximum tensile UHPC stress and deflection of the overall deck panel were only added by 2.0% and 2.4%, respectively. The test results indicated that the four specimens had adequate crack resistance, 4.4–14.9 times the corresponding design requirement for an allowable maximum crack width of 0.20 mm per the standards. Thus, the present study showed the exterior steel plates and T-shaped joints are practical approaches to raising the crack resistance of UHPC waffle deck panels, and verified the service safety of applying the proposed ribbed UHPC deck panel to the Qinglong Island Bridge.
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Data Availability Statement
The data, models, and/or code are available from the corresponding author.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (No. 52038003), and the Postdoctoral Research Fund of Northeastern University in China (No. 01270012810282). These programs are gratefully acknowledged.
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Information
Published In
Journal of Bridge Engineering
Volume 29 • Issue 2 • February 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 3, 2023
Accepted: Sep 25, 2023
Published online: Nov 17, 2023
Published in print: Feb 1, 2024
Discussion open until: Apr 17, 2024
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