GBT-based time-dependent analysis of steel-concrete composite beams including shear lag and concrete cracking effects

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

Henriques, D (Autor) Outra; Goncalves, R (Autor) Outra; Carlos Sousa (Autor) FEUP; Camotim, D (Autor) Outra

Revista

Título: Thin-Walled Structures

Vol. 150

ISSN: 0263-8231

Editora: Elsevier

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-00R-W6M

DOI: 10.1016/j.tws.2020.106706

Abstract (EN): In this paper, a GBT-based finite element previously developed by the authors for steel-concrete composite beams, which incorporates cross-section deformation (including shear lag effects) and concrete creep, is enhanced by including concrete cracking effects. In particular, a fixed smeared crack model with two orthogonal cracks is consistently combined with creep using a strain decomposition approach. As in the previous finite element, creep is modelled using a linear visco-elastic law and a Dirichlet series expansion of the creep function. A set of illustrative numerical examples is presented, to show the capabilities of the proposed element. For comparison purposes, shell finite element model results are provided. It is demonstrated that the proposed element makes it possible to obtain very accurate results with a relatively small number of cross-section deformation modes (cross-section DOFs) and finite elements, thus leading to significant computational savings with respect to shell element models.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 17