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A platform for research: civil engineering, architecture and urbanism
Generalized Beam Theory deformation modes for steel–concrete composite bridge decks including shear connection flexibility
https://orcid.org/0000-0003-3144-1602
https://orcid.org/0000-0002-7994-2687
https://orcid.org/0000-0002-7272-3596
Abstract This paper proposes a procedure to calculate cross-section deformation modes for steel–concrete composite bridge cross-sections, including shear connection flexibility, within the framework of the Generalized Beam Theory (GBT). The proposed procedure is computationally efficient and makes it possible to (i) handle arbitrary (flat-walled) composite cross-sections, including complex configurations with several closed cells, (ii) consider the geometric offset between the steel and concrete mid-lines, which is essential in steel–concrete composite members, and (iii) automatically identify, separate, and hierarchize the deformation modes into physically meaningful sets, including a set of shear connection slip deformation modes. For illustrative purposes, the various deformation mode sets are determined for two representative cross-sections, namely a twin-girder and a box-girder with closed longitudinal stiffeners. These deformation modes are then employed to perform the structural analysis of simply supported decks, showing that very accurate results are obtained with a small number of deformation modes and that the modal decomposition of the solution provides in-depth insight regarding the bridge structural behavior.
Highlights A method for calculating the GBT deformation modes for steel–concrete bridges is developed. Complex longitudinal stiffeners can be easily handled. Shear connection stiffness is taken into account. The resulting GBT-based finite element is very accurate and efficient.
Generalized Beam Theory deformation modes for steel–concrete composite bridge decks including shear connection flexibility
https://orcid.org/0000-0003-3144-1602
https://orcid.org/0000-0002-7994-2687
https://orcid.org/0000-0002-7272-3596
Abstract This paper proposes a procedure to calculate cross-section deformation modes for steel–concrete composite bridge cross-sections, including shear connection flexibility, within the framework of the Generalized Beam Theory (GBT). The proposed procedure is computationally efficient and makes it possible to (i) handle arbitrary (flat-walled) composite cross-sections, including complex configurations with several closed cells, (ii) consider the geometric offset between the steel and concrete mid-lines, which is essential in steel–concrete composite members, and (iii) automatically identify, separate, and hierarchize the deformation modes into physically meaningful sets, including a set of shear connection slip deformation modes. For illustrative purposes, the various deformation mode sets are determined for two representative cross-sections, namely a twin-girder and a box-girder with closed longitudinal stiffeners. These deformation modes are then employed to perform the structural analysis of simply supported decks, showing that very accurate results are obtained with a small number of deformation modes and that the modal decomposition of the solution provides in-depth insight regarding the bridge structural behavior.
Highlights A method for calculating the GBT deformation modes for steel–concrete bridges is developed. Complex longitudinal stiffeners can be easily handled. Shear connection stiffness is taken into account. The resulting GBT-based finite element is very accurate and efficient.
Generalized Beam Theory deformation modes for steel–concrete composite bridge decks including shear connection flexibility
https://orcid.org/0000-0003-3144-1602
https://orcid.org/0000-0002-7994-2687
https://orcid.org/0000-0002-7272-3596
Abstract This paper proposes a procedure to calculate cross-section deformation modes for steel–concrete composite bridge cross-sections, including shear connection flexibility, within the framework of the Generalized Beam Theory (GBT). The proposed procedure is computationally efficient and makes it possible to (i) handle arbitrary (flat-walled) composite cross-sections, including complex configurations with several closed cells, (ii) consider the geometric offset between the steel and concrete mid-lines, which is essential in steel–concrete composite members, and (iii) automatically identify, separate, and hierarchize the deformation modes into physically meaningful sets, including a set of shear connection slip deformation modes. For illustrative purposes, the various deformation mode sets are determined for two representative cross-sections, namely a twin-girder and a box-girder with closed longitudinal stiffeners. These deformation modes are then employed to perform the structural analysis of simply supported decks, showing that very accurate results are obtained with a small number of deformation modes and that the modal decomposition of the solution provides in-depth insight regarding the bridge structural behavior.
Highlights A method for calculating the GBT deformation modes for steel–concrete bridges is developed. Complex longitudinal stiffeners can be easily handled. Shear connection stiffness is taken into account. The resulting GBT-based finite element is very accurate and efficient.
Generalized Beam Theory deformation modes for steel–concrete composite bridge decks including shear connection flexibility
Vieira, Luís (author) / Gonçalves, Rodrigo (author) / Camotim, Dinar (author) / Pedro, José Oliveira (author)
Thin-Walled Structures ; 169
2021-09-02
Article (Journal)
Electronic Resource
English
Studies in composite design of steel beam and concrete bridge decks
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