Doctoral thesis (Dissertations and theses)
Development of a new design method to define the rotation capacity of steel hollow sections
Saloumi, Elsy
2016
 

Files


Full Text
PhD_Thesis_Elsy_Saloumi_2016.pdf
Author preprint (27.72 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Steel hollow section; rotation capacity; plastic analysis
Abstract :
[en] The present PhD thesis is dedicated to the characterisation of hollow section shapes’ rotational capacity. More precisely, the effort was made towards suggesting new ways to resort to plastic analysis, by defining a new and accurate proposition to characterise the rotation capacity Rcap of sections, which could be associated with the rotation demand of a structure Rdem. Therefore, the purpose of this thesis is to establish a direct dependence of the rotation capacity Rcap with a newly defined cross-section slenderness CS. Hence, current design standards disregard the rotation demand of the structure and allow plastic analysis based on a plate slenderness limit. To achieve this purpose, an experimental campaign was performed consisting in 23 bending tests on square and rectangular hollow sections tested in bending, in addition to 8 stub columns. Then, a numerical model based on the finite element software FINELg was calibrated to well represent these experimental tests, as well as cold-formed bending tests from literature. Based on these results, a good agreement between experimental and numerical results was shown and the numerical software was therefore validated. Accordingly, since the numerical software was proved to well represent the bending behaviour of hollow beams, around 8000 finite element simulations were performed while varying sections dimensions, material properties and loading configuration. These results reported that actual standards limitations were inappropriate, and stricter values were proposed. Moreover, based on the numerical computations, a continuous curve capable of describing the rotation capacity of sections as a function of the cross-section slenderness was proposed. The production route, loading application and yield strength were identified as key parameters having a major impact on the rotation capacity of sections. Consequently, different curves were proposed for each parameter; based on these curves, the rotation capacity of the section could be compared to the rotation demand of a structure in order to obtain a practical, safe, and reliable design calculation.
Disciplines :
Civil engineering
Author, co-author :
Saloumi, Elsy ;  Université de Liège - ULiège > Doct. sc. ingé. & techno. (archi., génie civ. - paysage)
Language :
English
Title :
Development of a new design method to define the rotation capacity of steel hollow sections
Defense date :
24 November 2016
Number of pages :
xvii, 249 + 120
Institution :
ULiège - Université de Liège
Degree :
Docteur en sciences de l'ingénieur
Promotor :
Jaspart, Jean-Pierre  ;  Université de Liège - ULiège > Urban and Environmental Engineering
President :
Dewals, Benjamin  ;  Université de Liège - ULiège > Urban and Environmental Engineering
Jury member :
Boissonnade, Nicolas
Geara, Fadi
Graham, Couchman
Knobloch, Markus
Demonceau, Jean-François  ;  Université de Liège - ULiège > Urban and Environmental Engineering
Available on ORBi :
since 30 November 2016

Statistics


Number of views
100 (13 by ULiège)
Number of downloads
395 (6 by ULiège)

Bibliography


Similar publications



Contact ORBi