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See detailMagnetospheric dynamics at Jupiter and Saturn
Palmaerts, Benjamin ULg

Speech (2014)

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See detailExtension of the Direct Strength Method to hot-rolled and welded H profile cross-sections
Li, Yongzhen ULg

Doctoral thesis (2014)

The cross-sectional capacity is limited by material yielding on one hand and local buckling on the other hand. Most current metallic structural design codes use the concept of section classification for ... [more ▼]

The cross-sectional capacity is limited by material yielding on one hand and local buckling on the other hand. Most current metallic structural design codes use the concept of section classification for determining the section capacity of hot-rolled profiles. In this system, there exists a discontinuity between the classes 2 and 3 under pure bending load condition, while for the class 4, the effective width method (EWM) must be used to account for local buckling phenomenon. With the appearance of the more complex cross-sections, especially for thin-walled steel structures, the calculation using EWM becomes more and more intolerable and complicated. In order to overcome these difficulties when evaluating the cross-section strength, the alternative Direct Strength Method (DSM) approach, developed only for cold-formed thin-walled members, has gained importance over the last few years, and has been adopted by the North American and Australian standards for the design of cold-formed steel structural members recently. This thesis investigates the possibility to extend the DSM method to hot-rolled and welded structural steel members, and the objective is to derive a new formulation that would cover the whole field of section slenderness without section classification system used in Eurocode 3, using the same procedure for the DSM developed for cold-formed thin-walled steel structural members. Hot-rolled and welded H sections are mainly considered in this thesis. The DSM is premised on the assumption that the strength can be predicted from the yield strength to the elastic critical load ratio used in conjunction with a strength curve; i.e. the same concept than the one used in Eurocode 3, in terms of member buckling phenomenon. In the DSM approach applied for cold-formed thin-walled sections, local buckling and distortional buckling modes should be considered. For common hot-rolled or welded sections, only local buckling needs to be considered since distortional buckling does not occur for these sections. All available test results in literature are collected and evaluated with the current methods for calculating the cross-section resistance such as EWM, DSM, and the recent Continuous Strength Method (CSM). A short comparison is made and their domains of applicability are commented. A consistent approach has been adopted to develop numerical models for hot-rolled and welded sections subjected to compression and bending respectively. The FE model was built in FineLg and verified against test results of the “Semi-comp: Plastic member capacity of semi-compact steel sections - a more economic design” project, which was carried out earlier with the objective of improving the utilization of plasticity in rolled and welded sections with medium cross-section slenderness. Measured material and geometric properties, initial geometrical imperfections and residual stresses distributions have been highlighted. Once verified against the test results, the FE models have been used to carry out a parametrical study aimed at providing more FE results and highlighting the local buckling interaction between the webs and the flanges. All the experimental and FE numerical results constitute data base for the derivation of the new DSM curves. On the basis of Winter Formula for plate buckling and the generic DSM strength curve, different formulas are proposed for hot-rolled and welded H cross-sections under axial and bending load respectively. Also the statistical evaluation and safety study is conducted to obtain the safety factor γ_M, which is required for practical design. [less ▲]

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See detailNumerical Simulation of a Conical Shape Made by Single Point Incremental Forming
Velosa De Sena, José ULg; Duchene, Laurent ULg; Habraken, Anne ULg et al

in Incremental sheet forming (2014, May 08)

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See detailL'hypertension artérielle
Krzesinski, Jean-Marie ULg

Conference (2014, May 08)

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See detailLa régionalisation de l'IPP. Quel impact pour les communes ?
Husson, Jean-François ULg

Conference (2014, May 08)

Cette contribution évoque les problèmes et questions soulevées par la régionalisation de l'impôt des personnes physiques dans le cadre de la 6e réforme de l'Etat. Les questions liées au "fiscal mix" sont ... [more ▼]

Cette contribution évoque les problèmes et questions soulevées par la régionalisation de l'impôt des personnes physiques dans le cadre de la 6e réforme de l'Etat. Les questions liées au "fiscal mix" sont notamment abordées. [less ▲]

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See detailAbout almost periodic sequences of integers and related concepts
Crama, Yves ULg

Scientific conference (2014, May 07)

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See detailCOMPARISON AND MOLECULAR CHARACTERIZATION OF ANIMAL AND HUMAN CLOSTRIDIUM DIFFICILE STRAINS
Rodriguez Diaz, Cristina ULg; Taminiau, Bernard ULg; Korsak Koulagenko, Nicolas ULg et al

Poster (2014, May 07)

The main objective of this study was to characterize and compare animal and human C. difficile strains with respect to the PCR-ribotype and the antibiotic resistance. Multilocus sequence typing analysis ... [more ▼]

The main objective of this study was to characterize and compare animal and human C. difficile strains with respect to the PCR-ribotype and the antibiotic resistance. Multilocus sequence typing analysis (MLST) was performed in order to study clonal relationships of the isolates. [less ▲]

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See detailContributions à l’amélioration des systèmes d’évaluations génétiques
Vanderick, Sylvie ULg; Gengler, Nicolas ULg

Conference given outside the academic context (2014)

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See detailL'Etat congolais souverain ou sous-tutelle? Essai d'analyse de la dynamique politique nationale.
Baenda Fimbo, Zacharie ULg

Scientific conference (2014, May 07)

Après la définition de certains concepts tels que l'Etat, la souveraineté et la tutelle, la présente communication a analysé la dynamique politique congolaise à travers l'histoire. De la première ... [more ▼]

Après la définition de certains concepts tels que l'Etat, la souveraineté et la tutelle, la présente communication a analysé la dynamique politique congolaise à travers l'histoire. De la première république à la troisième. Des interventions étrangères ayant divisé les leaders politiques congolais pendant la première législative à la présence quasi permanente de la Communauté internationale à travers la Mission des Nations Unies au Congo, en passant par la deuxième république de Mobutu, les réalités locales laissent voir que certaines décisions politiques, voire certaines prises de position sont dictées de l'étranger. Les faits analysés fait douter l'applicabilité de la notion de souveraineté à la gestion politique de l'Etat congolais. [less ▲]

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See detailPolitiques institutionelles et migrations. Quelle place les institutions belges laissent-elles à la diversité ?
Grandjean, Geoffrey ULg

Conference given outside the academic context (2014)

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See detailLa Cour européenne des droits de l'homme
Habran, Maxime ULg

Scientific conference (2014, May 07)

Cette conférence vise à mettre en perspective la liberté d'expression dans le cadre des arrêts de la CEDH

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See detailAvancées récentes dans l'investigation olfactive de la mort
Stefanuto, Pierre-Hugues ULg; Focant, Jean-François ULg

Scientific conference (2014, May 07)

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See detailÉcrire les «petites langues»: entre transparence et universalisme
Baiwir, Esther ULg

Conference (2014, May 06)

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See detailNouvelle méthode de criblage de mutants respiratoires du complexe I chez Chlamydomonas
Massoz, Simon ULg; Larosa, véronique; bailleul, benjamin et al

Scientific conference (2014, May 06)

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See detailL'astaxanthine: de la biologie à l'industrie
Fratamico, Anthony ULg

Scientific conference (2014, May 06)

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