ORBi: Lequesne Cédric - Modeling of the fatigue cracks in welded beam-to-column connection of steel moment frame buildings submitted to earthquake

Reference : Modeling of the fatigue cracks in welded beam-to-column connection of steel moment frame...


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/19767

Title :	Modeling of the fatigue cracks in welded beam-to-column connection of steel moment frame buildings submitted to earthquake
Language :	English
Author, co-author :	Lequesne, Cédric [Université de Liège - ULg > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F >]
	Gerday, Anne-Françoise [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
	Plumier, André [Université de Liège - ULg > Département Argenco : Secteur SE > Ingéniérie sismique >]
	Habraken, Anne [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
Publication date :	2005
Main document 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.
Pages :	233-238
Audience :	International
ISBN :	0-9547783-1-6
City :	Eastleigh
Country :	United Kingdom
Event name :	4th International Conference on Fracture and Damage Mechanics
Event date :	du 12 au 14 juillet 2005
Event place (city) :	Mallorca
Event country :	Espagne
Keywords :	[en] Fatigue Cracks ; Fatigue Continuum Damage Model ; residual stress in welding
	[fr] Cohesive Zone Model
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.
Permalink :	http://hdl.handle.net/2268/19767

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