Conceptual design of prestressed slab bridges through one-way flexural load balancing

Arici, Marcello; Granata, Michele Fabio

doi:10.12989/sem.2013.48.5.615

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…The first group corresponds to the permanent loads, and it integrates the following: • Self-weight. It is estimated considering the real geometry of the viaduct and the unit weight of each material (γ c ¼ 25kN=m 3 for concrete and γ s ¼ 78:5kN=m 3 for steel). • Initial prestressing of the cable-stayed system.…”

Section: Loads and Load Combinationsmentioning

confidence: 99%

“…1 Today, external prestressing with unbonded tendons is spreading rapidly for the construction of new bridges as well as for the rehabilitation and retrofitting of existing ones. 2,3 External prestressed systems have high efficiency due to their high eccentricity in relation to the deck's center of gravity. Depending on their relative position with respect to the deck, they generate different types of bridges.…”

Section: Introductionmentioning

confidence: 99%

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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: Loads and Load Combinationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…-the effect of axial force induced by prestressing and the consequent change in the inclination of principal stress in concrete (or inclination of the first crack, that is the same); -the effect of tendons inclination which introduces a vertical component of prestressing, generally opposed to the shear induced by applied loads, or the equivalent effect of variable height of cross section (Arici and Granata, 2013).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of web reinforcements in prestressed concrete box girders through shear-transverse bending domains

Granata

Recupero

2020

Advances in Structural Engineering

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In concrete box girders, the amount and distribution of reinforcements in the webs have to be estimated considering the local effects due to eccentric external loads and cross-sectional distortion and not only the global effect due to the resultant forces of a longitudinal analysis: shear, torsion and bending. This work presents an analytical model that allows designers to take into account the interaction of all these effects, global and local, for the determination of the reinforcements. The model is based on the theory of stress fields and it has been compared to a 3D finite element analysis, in order to validate the interaction domains. The results show how the proposed analytical model allows an easy and reliable reinforcement evaluation, in agreement with a more refined 3D analysis but with a reduced computational burden.

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Distributed models of self-stress value in textile-reinforced self-stressing concrete

Wang

Zhao

Wang

2016

Construction and Building Materials

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Conceptual design of prestressed slab bridges through one-way flexural load balancing

Cited by 11 publications

References 13 publications

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

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

Evaluation of web reinforcements in prestressed concrete box girders through shear-transverse bending domains

Distributed models of self-stress value in textile-reinforced self-stressing concrete

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