Structural design of responsive under-deck cable-stayed footbridges

Corral, María del Mar; Todisco, Leonardo

doi:10.1016/j.istruc.2022.05.077

Cited by 6 publications

(11 citation statements)

References 13 publications

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“…• The high compression forces acting on the deck may introduce stability problems, which should be verified. However, it is not expected to be an issue, as it has already been verified in a previous study by the authors, 32 which examined a steel smart under-deck cable-stayed footbridge. • Performing a comprehensive parametric analysis of various determinant aspects, such as the initial prestressing force, number of struts, and rise-to-span ratio, could significantly enhance the design of the underdeck cable-stayed structure.…”

Section: Future Workmentioning

confidence: 77%

“…To get a complete evaluation of the overall economic and environmental impact of the smart system, a more comprehensive analysis that takes into account all relevant costs and benefits should be conducted. The possibility of accidental cable breakage must be studied. Previous studies by the authors 32 have investigated this scenario when applying the smart system to steel structures, which provided satisfactory results. However, further research is required to assess the impact of cable breakage on concrete under‐deck cable‐stayed structures, as it is the case of the Osormort viaduct. The dynamic behavior of the viaduct must be analyzed, especially considering the increased slenderness of the deck, achieved through the smart system.…”

Section: Conclusion and Future Researchmentioning

confidence: 96%

“…• The possibility of accidental cable breakage must be studied. Previous studies by the authors 32 have investigated this scenario when applying the smart system to steel structures, which provided satisfactory results. However, further research is required to assess the impact of cable breakage on concrete under-deck cable-stayed structures, as it is the case of the Osormort viaduct.…”

Section: Future Workmentioning

confidence: 96%

“…In contrast to previous research conducted by the authors, 31,32 addressed at theoretically exploring the potential of these smart systems to steel footbridges, the research illustrated in this article presents a novel contribution with the application of this innovative concept to a real-scale prestressed concrete bridge.…”

Section: Research Significance and Paper Outlinementioning

confidence: 97%

“…Preliminary studies conducted by the authors 31,32 have already shown promising results, indicating significant material savings. The focus of these studies was to create the theoretical basis and evaluate its performance if applied to footbridges.…”

Section: Introductionmentioning

confidence: 98%

See 4 more Smart Citations

Structural design of a smart under‐deck cable‐stayed prestressed concrete viaduct: Theoretical basis and application to the Osormort viaduct

Corral,

Todisco

2024

Structural Concrete

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Under‐deck cable‐stayed systems have been extensively used in bridges to optimize the internal stress distribution, enhancing their structural performance. Although these systems provide highly contribute to counteract permanent loads, their efficiency to withstand live loads is reduced, thereby limiting opportunities for material savings. This effect is particularly relevant in concrete viaducts, where the relative stiffness of the deck with respect to the tendons is very high. This limitation can be overcome by using a smart under‐deck cable‐stayed system, which gradually modifies the tension in the stays as the live load increases, improving its performance. The smart behavior is achieved through the use of a linear actuator that replaces the midspan strut of a conventional under‐deck cable‐stayed bridge. This article starts by presenting the theoretical considerations on the structural design of these innovative systems. Then, the application of this technology to multi‐span prestressed concrete bridges is evaluated using a numerical analysis. Specifically, the Osormort viaduct has been selected as a reference bridge for comparison purposes. This work quantifies the performance of the smart systems from different perspectives, including material quantities, CO2 emissions, and cost, for different portions of the live load compensated by the smart system. The comparisons reveal that the implementation of a smart system can optimize material quantity of the deck (concrete volume and internal prestressing), resulting in cost reductions of up to 15% and carbon emissions reductions of up to 9% compared to a conventional solution. In summary, this investigation provides a further confirmation of the potential of smart cable‐stayed under‐deck systems to significantly improve the structural performance of bridges while reducing material usage and costs.

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Section: Future Workmentioning

confidence: 77%