< Terug naar vorige pagina

Publicatie

Effective bending stiffness of steel-concrete composite columns with multiple encased steel profiles

Tijdschriftbijdrage - Tijdschriftartikel

For the structural analysis of steel-concrete composite columns, Eurocode 4 allows only cross-sections with one implemented steel profile and double symmetry. However, there are worldwide more and more examples of composite columns with more than one embedded steel profiles, like for example in the International Financial Center of Hong Kong and the Ping Anh Finance Center in Shenzhen. The common practice of analysis of such columns is to use the simple Euler-Bernoulli beam theory to describe the global behaviour. But recently, performed tests reveal that the resulting deformations exceed largely the deformations predicted by the aforementioned analytical model. The presented contribution shows a modified approach to analyse the stiffness of composite columns with multiple encased steel profiles. Based on the performed laboratory tests and numerical simulations with the finite element code Abaqus (R), a new method to determine the effective stiffness is proposed. It combines a modified Timoshenko beam theory with embedded Vierendeel truss model & ndash; the VTBM model. This modified method leads to a reduced value of the effective stiffness, more realistic deformations at Ultimate Limit State and thus to a more realistic assessment of the Euler's critical buckling load. (c) 2021 Elsevier Ltd. All rights reserved.
Tijdschrift: JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
ISSN: 0143-974X
Volume: 181
Jaar van publicatie:2021
Trefwoorden:High-rise buildings, Steel-concrete composite columns, Fully embedded composite columns with multiple encased steel profiles, Shear transfer, Effective stiffness, Buckling load
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:1
Auteurs:International
Authors from:Higher Education
Toegankelijkheid:Closed