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Modeling of the fatigue cracks in welded beam-to-column connection of steel moment frame buildings submitted to earthquake
Lequesne, Cédric; Gerday, Anne-Françoise; Plumier, André et al.
2005In Aliabadi, M. H.; Planas, J.; Buchholz, F.-G. et al. (Eds.) Proceedings of the 4th International Conference on Fracture and Damage Mechanics
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Keywords :
Fatigue Cracks; Fatigue Continuum Damage Model; residual stress in welding; Cohesive Zone Model; LIMARC
Abstract :
[en] Fatigue cracks in welded connections of steel moment frame buildings submitted to earthquakes are studied. The connections of beams with thick flanges designed to resist to seismic phenomena by plastic dissipation are presented. The structural components, the materials and the crack mechanics are described. To predict the crack initiation, the knowledge of residual internal stresses, generated by the welding process, is required. So these stresses are assessed by a FEM thermo-mechanical analysis. The potential sites of crack locations are detected by using an FEM model of the connection with the continuum damage model of Lemaître and Chaboche. After these FEM analyses, new meshes with specific elements located at the potential crack locations are defined. A cohesive zone law is used to model the crack propagation. This model describes the crack growth by analyzing the energy released by the generation of the new surfaces and damage micro-phenomena behind the crack tip. A constitutive tension-separation law computes this energy. In these cases of low cycle fatigue, the damage and the cyclic loading conditions are taken into account.
Disciplines :
Civil engineering
Author, co-author :
Lequesne, Cédric ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
Gerday, Anne-Françoise ;  Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Plumier, André  ;  Université de Liège - ULiège > Département Argenco : Secteur SE > Ingéniérie sismique
Habraken, Anne  ;  Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Language :
English
Title :
Modeling of the fatigue cracks in welded beam-to-column connection of steel moment frame buildings submitted to earthquake
Publication date :
2005
Event name :
4th International Conference on Fracture and Damage Mechanics
Event place :
Mallorca, Spain
Event date :
du 12 au 14 juillet 2005
Audience :
International
Main work title :
Proceedings of the 4th International Conference on Fracture and Damage Mechanics
Editor :
Aliabadi, M. H.
Planas, J.
Buchholz, F.-G.
Abersek, B.
Alfaiate, J.
Nishida, S. I.
ISBN/EAN :
0-9547783-1-6
Pages :
233-238
Peer reviewed :
Peer reviewed
Available on ORBi :
since 25 August 2009

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