Abstract
AbstractThe high-performance topping concrete overlay would significantly reduce the fatigue stresses at susceptible details of orthotropic steel deck (OSD) and effectively improve the fatigue performance. Full-scale fatigue tests and numerical simulations were carried out to quantify the effects of steel fiber reinforced concrete (SFRC) topping pavement in reducing the OSD fatigue stresses based on a practical bridge design. Fatigue stress of the OSD critical details was measured from tests and cracking was observed in the SFRC overlay. Both an innovative pre-pump-pulse Brillouin optical time domain analysis (PPP-BOTDA) distributed optical fiber sensor and strain gauges were also used to measure the stress at OSD fatigue-prone details, including the crossbeam cut-out, rib-to-deck weld, rib-to-crossbeam weld and splice of U-rib. The corresponding three-dimensional (3-D) finite element model was then established and verified by the test results, and used to conduct a parametric study to obtain a quantitative expression of fatigue stress reduction factor, in terms of relative elastic modulus and thickness of overlay and steel deck plate. The proposed quantitative model of the fatigue stress reduction effect can guide the cost-effective design of composite bridge deck.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Ocean Engineering,Civil and Structural Engineering
Reference30 articles.
1. Abdelbaset, H., Cheng, B., Tian, L., Li, H., & Zhang, Q. (2020). Reduce hot spot stresses in welded connections of orthotropic steel bridge decks by using UHPC layer: Experimental and numerical investigation. Engineering Structures, 220(C), 1–16. https://doi.org/10.1016/j.engstruct.2020.110988
2. Deck, B., Robert, C., & John, F. (2012). Manual for design, construction, and maintenance of orthotropic steel deck bridge. FHWA IF.
3. Dieng, L., Marchand, P., Gomes, F., Tessier, C., & Toutlemonde, F. (2013). Use of UHPFRC overlay to reduce stresses in orthotropic steel decks. Journal of Constructional Steel Research, 89(Oct), 30–41. https://doi.org/10.1016/j.jcsr.2013.06.006
4. ECS. (2005). Eurocode 3: Design of steel structures, part 1–9: Fatigue (EN 1993-1-9). European Committee for Standardization.
5. Fisher, J., & Barsom, J. (2016). Evaluation of cracking in the rib-to-deck welds of the Bronx-Whitestone bridge. Journal of Bridge Engineering, 21(3), 1–10. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000823