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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.
Highlights Linear visco-elasticity is implemented in a GBT-based finite element. A Dirichlet series expansion of the creep function is employed. Time-dependent shear lag and distortional effects are accurately captured. The proposed element is very efficient when compared with shell element models.
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.
Highlights Linear visco-elasticity is implemented in a GBT-based finite element. A Dirichlet series expansion of the creep function is employed. Time-dependent shear lag and distortional effects are accurately captured. The proposed element is very efficient when compared with shell element models.
A visco-elastic GBT-based finite element for steel-concrete composite beams
Henriques, David (author) / Gonçalves, Rodrigo (author) / Camotim, Dinar (author)
Thin-Walled Structures ; 145
2019-09-27
Article (Journal)
Electronic Resource
English
ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS FOR STEEL-CONCRETE COMPOSITE BEAMS
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Finite element analysis of steel-concrete composite beams
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