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See detailNumerical modelling of steel structures behaviour under fire conditions
Franssen, Jean-Marc ULg

Scientific conference (1997, April 02)

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See detailNumerical modelling of storage racks subjected to earthquake
Degée, Hervé ULg; Denoël, Vincent ULg

in Proceedings of COMPDYN 07, Conference on Computational Dynamics (2007)

This paper presents some aspects of the non linear dynamic time-history analysis of storage racks made of thin-walled steel products commonly used in warehouses when they are subjected to an earthquake ... [more ▼]

This paper presents some aspects of the non linear dynamic time-history analysis of storage racks made of thin-walled steel products commonly used in warehouses when they are subjected to an earthquake action. It focuses essentially on the accounting for structural non-linearities (geometric second order behavior of the structure and non-linear material be-havior of the joints) and for the possible relative motion between the rack and the stored goods that occurs as soon as the inertial force exceeds the friction resistance. In particular, it presents the algorithm used of to couple these two problems, followed by some simple appli-cations and comparisons with test results. [less ▲]

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See detailNumerical modelling of the Canary Upwelling
Elmoussaoui, Abdellali; Djenidi, Salim ULg

in Annales Geophysicae. Series B, Terrestrial and Planetary Physics (1997), 15(suppl. II),

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See detailNumerical modelling of the forging process of rolls for rolling mills
Charles, J. F.; Castagne, S.; Zhang, Lihong ULg et al

in Proceedings of the 5ème Congrès national belge, Mecanique théorique et appliquée (2000)

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See detailNumerical Modelling of the Forging Process of Rolls for Rolling Mills
Castagne, S.; Charles; Habraken, Anne ULg et al

in Proceedings of the 2nd International Conference on forging and related technology (2000, April)

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See detailNumerical modelling of the forging process of rolls for rolling mills
Charles, J.-F.; Castagne, Sylvie; Zhang, Lihong ULg et al

in Pietrzyk, M.; Kusiak, J.; Majta, J. (Eds.) et al Proceedings of the 8th International Conference on Metal Forming (2000)

This article presents comparisons of forging processes between two flat tools, between two round tools, and at different forging temperatures. Simulation results help to recover and better understa,d long ... [more ▼]

This article presents comparisons of forging processes between two flat tools, between two round tools, and at different forging temperatures. Simulation results help to recover and better understa,d long practice in the forging industry. [less ▲]

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See detailNumerical modelling of the hydrogeological and geomechanical behaviour of a large slope movement: The Triesenberg landslide (Liechtenstein).
François, Bertrand ULg; Tacher, Laurent; Bonnard, Christophe et al

in Canadian Geotechnical Journal (2007), 44(7), 840-857

Using advanced hydrogeological and geomechanical finite element modelling, it has been possible to model the mechanical behaviour of a large slope movement, the Triesenberg landslide. This slope is ... [more ▼]

Using advanced hydrogeological and geomechanical finite element modelling, it has been possible to model the mechanical behaviour of a large slope movement, the Triesenberg landslide. This slope is located along the Rhine valley in the Principality of Liechtenstein and covers an area of around 5 km(2), which includes two villages. Pore-water pressure fields calculated by the hydrogeological model were used as input for the geomechanical model. The results obtained through numerical simulation agree fairly well with field measurements of peak velocity, spatial and temporal distribution of velocity, and total displacements. Such results were obtained using a modified Cam-Clay elastoplastic constitutive model for which the required material parameters were obtained through careful geotechnical tests. These finite element models were carried out in two and three dimensions to gradually improve the understanding of the physical phenomena governing the hydrogeological conditions and the movements of the slope. [less ▲]

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See detailNumerical modelling of the photorefractive effect in II-VI semiconductors
Nguyen, Ngoc Duy ULg; Schmeits, Marcel

Poster (1999)

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See detailNumerical modelling of the photorefractive effect in II-VI semiconductors
Nguyen, Ngoc Duy ULg; Schmeits, Marcel

Poster (2000)

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See detailNumerical modelling of the resaturation of swelling clay with gas injection
Gerard, Pierre ULg; Radu, Jean-Pol ULg; Talandier, Jean et al

in Alonso, Edouardo; Gens, Antonio (Eds.) Unsaturated Soils (2010)

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See detailNumerical modelling of the thermo-hydro-chemical (THC) coupled processes of underground coal seam fire
Liu, Xing Feng; Collin, Frédéric ULg; Buzzi, Olivier

Conference (2013)

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See detailNumerical modelling of the upwelling processes: application to the Moroccan southern coast
Elmoussaoui, Abdellali; Djenidi, Salim ULg; Beckers, Jean-Marie ULg et al

in Chagdali, M. (Ed.) Hydrodynamique Marine - Calculs et Expérimentation (1997)

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See detailNumerical modelling of thin-walled stainless steel structural elements in case of fire
Lopes, N.; Vila Real, P.; Simoes da Silva, L. et al

in Kodur; Tan (Eds.) Proceedings of the Fifth International Conference Structures in Fire (2008)

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the ... [more ▼]

In this paper, numerical tests made in stainless steel thin-walled elements, using the program SAFIR, will be presented. In order to make these simulations, two main changes in SAFIR were made: i) the program was changed in order to deal with the stainless steel 2D material properties to be used with shell elements and ii) the possibility of the program to take into account residual stresses in shell elements was introduced. The stainless steel stress-strain relationship at high temperatures, was based on the one presented in part 1.2 of Eurocode 3 [1], which has no initial linear branch as the case of carbon steel. The hardening rule to be used on the shell element formulation could not be exactly established without an approximation of the Eurocode 3 constitutive law [1]. Due to the fact that the SAFIR procedure to take into account the residual stresses consists in transforming them first into residual strains and adding them after to the other initial strains [2], it was necessary to implement a procedure that took in consideration the nonlinearity of the material stress-strain relationship. The paper shows the influence of the residual stresses on the ultimate load bearing resistance of thin-walled stainless steel structural elements in case of fire. [less ▲]

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See detailNumerical Modelling of Thin-Walled Stainless Steel Structural Elements in Case of Fire
Lopes, Nuno; Vila Real, Paulo; Simoes da Silva, Luís et al

in Fire Technology (2010), 46(1), 91-108

In this paper, the structural response of stainless steel thin-walled elements submitted to fire is analysed numerically by means of the geometrically and materially non-linear Finite Element program ... [more ▼]

In this paper, the structural response of stainless steel thin-walled elements submitted to fire is analysed numerically by means of the geometrically and materially non-linear Finite Element program SAFIR, including imperfections. In order to make these simulations, two main changes in the program were made: (i) the code was changed in order to deal with the stainless steel 2D material constitutive law to be used with shell elements and (ii) the possibility of the program to take into account residual stresses with shell finite elements was introduced. The stainless steel stress–strain relationship at high temperatures was based on the one presented in part 1.2 of Eurocode 3. To model the strain hardening exhibited by the stainless steels, using the shell element formulation, an approximation to the Eurocode 3 constitutive law was needed. Local and global geometrical imperfections were considered in the simulations. The paper shows the influence of the residual stresses on the ultimate load-carrying capacity of thin-walled stainless steel structural elements in case of fire. [less ▲]

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See detailNumerical modelling of timber connections under fire loading using a component model
Cachim, Paulo B.; Franssen, Jean-Marc ULg

in Fire Safety Journal (2009), 44

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The ... [more ▼]

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The constitutive relations for dowel–timber interaction are detailed and compared with experimental results. In the fire situation, a two-step approach is used: first, three-dimensional (3D) thermal analysis of the connection is performed using a conductive model with timber properties defined in Eurocode 5 in order to calculate the temperatures in the fasteners and timber; afterwards, the mechanical analysis using a component model is carried out using mechanical properties of the steel dowel and of timber adjusted to the temperatures obtained by the thermal analyses. These properties are reduced according to Eurocode 3 and Eurocode 5, respectively. Numerical simulations are presented that allow evaluation of the model behaviour and performance. Obtained results show good agreement with available experimental data, indicating that regardless of its simplicity, the component model has the capability to accurately model timber connections under fire loading [less ▲]

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See detailNumerical modelling of transient flows with high sediment concentrations
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Pirotton, Michel ULg

in DE WRACHIEN, D. (Ed.) Monitoring, Simulation, Prevention and Remediation of Dense Debris Flows II (2008)

The main purpose of the present paper is to describe and discuss the development, validation and application of a numerical model designed to handle transient flows with high sediment transport rates. The ... [more ▼]

The main purpose of the present paper is to describe and discuss the development, validation and application of a numerical model designed to handle transient flows with high sediment transport rates. The model considers non-equilibrium transport (i.e. accounting for loading / unloading delay) and is numerically as well as physically totally coupled. The closure relations needed to evaluate the exchange fluxes between the fixed bottom and the flowing mixture (erosion and deposition rates) are also detailed in the paper. Finally, the model is validated against experimental data collected in the framework of the European project IMPACT. [less ▲]

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See detailNumerical modelling of two-way reinforced concrete slabs in fire
Lim, Linus; Buchanan, Andrew; Moss, Peter et al

in Engineering Structures (2004), 26(8), 1081-1091

This paper describes numerical modelling of the fire behaviour of two-way reinforced concrete slabs using a special purpose non-linear finite-element program, SAFIR. Several two-way reinforced concrete ... [more ▼]

This paper describes numerical modelling of the fire behaviour of two-way reinforced concrete slabs using a special purpose non-linear finite-element program, SAFIR. Several two-way reinforced concrete and composite steel-concrete slabs are tested under exposure to the ISO standard fire in order to validate the shell finite element in the SAFIR program. The modelling results showed agreement with the fire tests and demonstrate that the SAFIR shell element can be used to predict tensile membrane behaviour of two-way reinforced concrete slabs in fire conditions. The analyses show that two-way slabs have excellent fire resistance if they deform in double curvature and develop tensile membrane action. (C) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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