Faculté des Sciences appliquées
Faculté des Sciences appliquées

Robustness of steel frames further to a column loss: development of analytical methods for practitioners

Jacques, Mathilde ULiège
Promotor(s) : Demonceau, Jean-François ULiège ; Jaspart, Jean-Pierre ULiège
Date of defense : 26-Jun-2019/28-Jun-2019 • Permalink :
Title : Robustness of steel frames further to a column loss: development of analytical methods for practitioners
Translated title : [en] Robustesse des portiques en acier suite à la perte d'une colonne: développement de méthodes analytiques pour les praticiens
Author : Jacques, Mathilde ULiège
Date of defense  : 26-Jun-2019/28-Jun-2019
Advisor(s) : Demonceau, Jean-François ULiège
Jaspart, Jean-Pierre ULiège
Committee's member(s) : Denoël, Vincent ULiège
Seret, Sébastien 
Language : English
Discipline(s) : Engineering, computing & technology > Civil engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil des constructions, à finalité
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] In order to fill the lack of practical guidelines in the European recommendations regarding the structures robustness, research are conducted in Liège University on this topic. This master thesis focuses on the "alternative load path method" which analyses a structure further to the loss of a structural element due to an exceptional event. More specifically, the topic of this master thesis is the analytical model developed in Liège University designed to characterize the response of a steel frame further to the loss of one of its columns. A particular plastic mechanism is assumed to form in the "directly affected part" above the lost element while the rest of the structure is assumed to behave elastically.

The last version of the model and its implementation, after years of incremental modifications, have not yet been properly stated and verified. Therefore, the first part consists to detail and verify extensively the analytical model and its implementation developed so far. A particular emphasis was brought to the field of applications and the assumptions made during each development step.

Afterwards, a first improvement of the initial model is implemented to enhance its accuracy and to widen its field of application. This improvement includes the combination of Matlab and BeamZ. After clearly stated the methodology and its implementation, new developments are validated through the comparison of different scenarios with Finelg simulations. Besides, during the validation of the new implementation, the plastic mechanism assumed in the initial model have been adjusted due to inconsistencies with results obtained in Finelg.

Finally, a second implemented improvement aims to introduce the yielding of the "indirectly affected part" of the structure, that was not taken into account in the initial analytical model. Once the methodology and its implementation are clearly detailed, the implementation is verified and validated through comparison with Finelg simulations.



Access Statement_signed.pdf
Size: 625.9 kB
Format: Adobe PDF
Access Resume_Mathilde_Jacques.pdf
Size: 59.5 kB
Format: Adobe PDF
Access TFE_Mathilde_Jacques.pdf
Size: 9.92 MB
Format: Adobe PDF


  • Jacques, Mathilde ULiège Université de Liège > Master ingé. civ. constr., fin.


Committee's member(s)

  • Denoël, Vincent ULiège Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
    ORBi View his publications on ORBi
  • Seret, Sébastien Bureau d'Etude Greisch
  • Total number of views 40
  • Total number of downloads 250

All documents available on MatheO are protected by copyright and subject to the usual rules for fair use.
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.