A visco-elastic GBT-based finite element for steel-concrete composite beams

David Henriques; Rodrigo Gonçalves; Dinar Camotim

doi:10.1016/j.tws.2019.106440

A visco-elastic GBT-based finite element for steel-concrete composite beams

David Henriques, Rodrigo Gonçalves, Dinar Camotim

DEC - Departamento de Engenharia Civil

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

This paper reports the latest developments concerning the use of Generalised Beam Theory (GBT) in the field of steel-concrete composite beams. In particular, a GBT-based finite element is presented that uses a linear visco-elastic material law to capture, accurately and efficiently (with a very low computational cost), the effects of concrete creep, as well as cross-section distortion and shear lag in complex cross-sections (combining closed cells and open branches). It is shown that the versatility of the GBT approach makes it possible to obtain accurate solutions with a fairly small number of cross-section deformation modes (cross-section DOFs), leading to significant computational savings with respect to standard shell finite element models. Several numerical examples are presented, to illustrate the capabilities and potential of the proposed GBT-based finite element.

Original language	English
Article number	106440
Number of pages	11
Journal	Thin-Walled Structures
Volume	145
DOIs	https://doi.org/10.1016/j.tws.2019.106440
Publication status	Published - 1 Dec 2019

Keywords

Concrete creep
Cross-section deformation
Generalised beam theory (GBT)
Shear lag
Steel-concrete composite beams
Visco-elasticity

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10.1016/j.tws.2019.106440

Cite this

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title = "A visco-elastic GBT-based finite element for steel-concrete composite beams",

abstract = "This paper reports the latest developments concerning the use of Generalised Beam Theory (GBT) in the field of steel-concrete composite beams. In particular, a GBT-based finite element is presented that uses a linear visco-elastic material law to capture, accurately and efficiently (with a very low computational cost), the effects of concrete creep, as well as cross-section distortion and shear lag in complex cross-sections (combining closed cells and open branches). It is shown that the versatility of the GBT approach makes it possible to obtain accurate solutions with a fairly small number of cross-section deformation modes (cross-section DOFs), leading to significant computational savings with respect to standard shell finite element models. Several numerical examples are presented, to illustrate the capabilities and potential of the proposed GBT-based finite element.",

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AU - Gonçalves, Rodrigo

AU - Camotim, Dinar

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AB - This paper reports the latest developments concerning the use of Generalised Beam Theory (GBT) in the field of steel-concrete composite beams. In particular, a GBT-based finite element is presented that uses a linear visco-elastic material law to capture, accurately and efficiently (with a very low computational cost), the effects of concrete creep, as well as cross-section distortion and shear lag in complex cross-sections (combining closed cells and open branches). It is shown that the versatility of the GBT approach makes it possible to obtain accurate solutions with a fairly small number of cross-section deformation modes (cross-section DOFs), leading to significant computational savings with respect to standard shell finite element models. Several numerical examples are presented, to illustrate the capabilities and potential of the proposed GBT-based finite element.

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KW - Cross-section deformation

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A visco-elastic GBT-based finite element for steel-concrete composite beams

Abstract

Keywords

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