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Titre : Réalisation d'une source d'ions à confinement magnétique et à extraction axiale : application à l'étude des instabilités perturbant son fonctionnement de production d'ions multicharges Type de document : texte imprimé Auteurs : Jean Machet ; Univ. de Poitiers, Éditeur scientifique ; M. Gray, Directeur de thèse Année de publication : 1974 Importance : 113 f. Note générale : 01 Disponible au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Confinement Ion Magnétisme Index. décimale : 530 Physique Diplôme : Doctorat en sciences En ligne : ../theses/physique/MAC364.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3235 Réalisation d'une source d'ions à confinement magnétique et à extraction axiale : application à l'étude des instabilités perturbant son fonctionnement de production d'ions multicharges [texte imprimé] / Jean Machet ; Univ. de Poitiers, Éditeur scientifique ; M. Gray, Directeur de thèse . - 1974 . - 113 f.
01 Disponible au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Confinement Ion Magnétisme Index. décimale : 530 Physique Diplôme : Doctorat en sciences En ligne : ../theses/physique/MAC364.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3235 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAC/364 MAC/364 Thèse Bibliothèque principale Thèses Disponible Etude du comportement flexionnel des poteaux en béton armé à haute résistance sous action sismique. / Abdesselam Bourouz
Titre : Etude du comportement flexionnel des poteaux en béton armé à haute résistance sous action sismique. Type de document : texte imprimé Auteurs : Abdesselam Bourouz, Auteur ; Nasr-Eddine Chikh, Directeur de thèse Mention d'édition : 29 novembre 2018 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 97 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : G,Civil: Matériaux et Durabilité des Constructions confinement ductilité résistance béton à haute résistance CFRP containment ductility strength high strength concrete الاحتواء الليونة القوة الخرسانة عالية القوة Index. décimale : 624 Génie civil Résumé : During recent earthquakes, weaknesses in strength and ductility were encountered in vertical structural elements, particularly columns, despite the existence of strict regulations. Among these deficiencies are loss of stability, buckling, occurrence of major constraints and finally less ductility. The results of the surveys reveal many cases of inadequate, inappropriate or poorly constructed columns confinement. The present research is based on these findings by studying the response of reinforced concrete columns under different types of confinement under axial loading. After a synthesis of previous works and an analytical study, an experimental program was realized at the level of the Materials and Durability Laboratory of the After a synthesis of previous works, an analytical study taking into account various models of the behavior of high strength concrete columns, an experimental program was elaborated and realized at the Laboratoire Matériaux et Durabilité des Constructions of the Department of Civil Engineering, Université Frères Mentouri Constantine. The analytical study of the behavior of internally confined high-strength concrete was carried out by varying different parameters, such as: concrete strength, steel yielding strength, transverse reinforcement density / confined core, section shape, etc. Experimental results obtained by several researchers were collected and used in this analysis. The objectives sought by this study lie mainly in the evaluation of their influence on resistance and ductility gains. The flexural capacity of conventionally confined, high-strength concrete sections was discussed. After the equilibrium and deformation compatibility expressions of the studied section were established, a computer program in visual basic has been developed to carry out a parametric analysis which takes into account the same preceding factors. An experimental test campaign was carried out on several short columns specimens of self-compacting concrete subjected to uniaxial compression. In the first place tests were carried out on specimens of circular section conventionally confined with variables such as concrete strength and rate of transverse reinforcement. The second part concerned specimens confined externally by bonding CFRP-type composite fabrics. Finally, as an interesting contribution, not least, a third type of containment was discussed, that obtained by the use of PVC tubes, which were also used as formwork. The main goal of this experimental campaign is to evaluate the effect of confinement on the behavior of short columns under axial loading.
Diplôme : Doctorat en sciences En ligne : ../theses/gcivil/BOU7820.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11652 Etude du comportement flexionnel des poteaux en béton armé à haute résistance sous action sismique. [texte imprimé] / Abdesselam Bourouz, Auteur ; Nasr-Eddine Chikh, Directeur de thèse . - 29 novembre 2018 . - جامعة الإخوة منتوري قسنطينة, 2018 . - 97 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : G,Civil: Matériaux et Durabilité des Constructions confinement ductilité résistance béton à haute résistance CFRP containment ductility strength high strength concrete الاحتواء الليونة القوة الخرسانة عالية القوة Index. décimale : 624 Génie civil Résumé : During recent earthquakes, weaknesses in strength and ductility were encountered in vertical structural elements, particularly columns, despite the existence of strict regulations. Among these deficiencies are loss of stability, buckling, occurrence of major constraints and finally less ductility. The results of the surveys reveal many cases of inadequate, inappropriate or poorly constructed columns confinement. The present research is based on these findings by studying the response of reinforced concrete columns under different types of confinement under axial loading. After a synthesis of previous works and an analytical study, an experimental program was realized at the level of the Materials and Durability Laboratory of the After a synthesis of previous works, an analytical study taking into account various models of the behavior of high strength concrete columns, an experimental program was elaborated and realized at the Laboratoire Matériaux et Durabilité des Constructions of the Department of Civil Engineering, Université Frères Mentouri Constantine. The analytical study of the behavior of internally confined high-strength concrete was carried out by varying different parameters, such as: concrete strength, steel yielding strength, transverse reinforcement density / confined core, section shape, etc. Experimental results obtained by several researchers were collected and used in this analysis. The objectives sought by this study lie mainly in the evaluation of their influence on resistance and ductility gains. The flexural capacity of conventionally confined, high-strength concrete sections was discussed. After the equilibrium and deformation compatibility expressions of the studied section were established, a computer program in visual basic has been developed to carry out a parametric analysis which takes into account the same preceding factors. An experimental test campaign was carried out on several short columns specimens of self-compacting concrete subjected to uniaxial compression. In the first place tests were carried out on specimens of circular section conventionally confined with variables such as concrete strength and rate of transverse reinforcement. The second part concerned specimens confined externally by bonding CFRP-type composite fabrics. Finally, as an interesting contribution, not least, a third type of containment was discussed, that obtained by the use of PVC tubes, which were also used as formwork. The main goal of this experimental campaign is to evaluate the effect of confinement on the behavior of short columns under axial loading.
Diplôme : Doctorat en sciences En ligne : ../theses/gcivil/BOU7820.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11652 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7820 BOU/7820 Thèse Bibliothèque principale Thèses Disponible
Titre : Performance parasismique des poteaux en tube d’acier remplis de béton. Type de document : texte imprimé Auteurs : Abdesselem Chair, Auteur ; Nabil Djebbar, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 108 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : performance parasismique résistance béton confinement chemisage en acier seismic performance strength concrete steel lining التحسينات المضادة للزلازل مقاومة الخرسانة الحصر غلاف فولاذي Index. décimale : 624 Génie civil Résumé : Mixed steel tube poles filled with concrete are increasingly used in the design of modern multi-stage structures (lathes). The investigations developed in recent decades confirm their beneficial use, they are used as a component of a structural system given excellent ability to absorb and dissipate energy or as a method of reinforcing damaged structures in reinforced concrete such as post or bridge stack , by reinforcement by steel lining. The confinement of concrete by steel pipe has unavoidable technical and economic advantages in the building and public works sector. The majority of the universally established codes ACI, AISC, EO4 have incorporated the methods of analysis and design for the calculation of mixed poles in the regulation, without a repair guide. The current Algerian regulation RPA 99 suffers from this lack. The research focuses in this axis. Moreover, the mixed poles contribute to provide the
structural elements with a high resistance, a high ductility and a high rigidity, with a remarkable optimization of the materials implemented In addition to these advantages, the steel tubes also serve as formwork thus reducing the cost and the duration of realization. The current philosophy is that under dynamic load plastic hinges develop in certain critical sections which must be selected beforehand; and it is essential to know the resistance and the deformation capacity of each structural element to ensure that the mechanism of ruin develops in the desired way. In this context, the structural elements are dimensioned so as to be able to withstand lateral displacements without compromising the overall balance of the structure.
We present in this thesis:
•A bibliographic study with a synthesis of the main existing confinement models, analytical
and theoretical. The influence of the main determining parameters in the evaluation of the gain in resistance and deformation. Estimation of the bearing capacity of mixed columns.
• An experimental program carried out at the level of the civil engineering laboratory. Eighteen (18) steel tube specimens filled with self-placing concrete were tested for uni-axial compression, for different parameters, with incremental force-displacement acquisition to failure. Four (04) non-confined concrete specimens were subjected to a standard compression test. The analysis and discussion of the results allowed us: to establish a law of behavior of the composite material. To refine the correlation between theoretical and experimental model.
• A study on a real case of bridge was applied to estimate the levels of performance (capacity of resistance and deformation) after reinforcement of the stack of this structure by the technique of lining and thus to value the gain in resistance and deformation.Diplôme : Doctorat en sciences En ligne : ../theses/gcivil/CHA7397.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11047 Performance parasismique des poteaux en tube d’acier remplis de béton. [texte imprimé] / Abdesselem Chair, Auteur ; Nabil Djebbar, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 108 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : performance parasismique résistance béton confinement chemisage en acier seismic performance strength concrete steel lining التحسينات المضادة للزلازل مقاومة الخرسانة الحصر غلاف فولاذي Index. décimale : 624 Génie civil Résumé : Mixed steel tube poles filled with concrete are increasingly used in the design of modern multi-stage structures (lathes). The investigations developed in recent decades confirm their beneficial use, they are used as a component of a structural system given excellent ability to absorb and dissipate energy or as a method of reinforcing damaged structures in reinforced concrete such as post or bridge stack , by reinforcement by steel lining. The confinement of concrete by steel pipe has unavoidable technical and economic advantages in the building and public works sector. The majority of the universally established codes ACI, AISC, EO4 have incorporated the methods of analysis and design for the calculation of mixed poles in the regulation, without a repair guide. The current Algerian regulation RPA 99 suffers from this lack. The research focuses in this axis. Moreover, the mixed poles contribute to provide the
structural elements with a high resistance, a high ductility and a high rigidity, with a remarkable optimization of the materials implemented In addition to these advantages, the steel tubes also serve as formwork thus reducing the cost and the duration of realization. The current philosophy is that under dynamic load plastic hinges develop in certain critical sections which must be selected beforehand; and it is essential to know the resistance and the deformation capacity of each structural element to ensure that the mechanism of ruin develops in the desired way. In this context, the structural elements are dimensioned so as to be able to withstand lateral displacements without compromising the overall balance of the structure.
We present in this thesis:
•A bibliographic study with a synthesis of the main existing confinement models, analytical
and theoretical. The influence of the main determining parameters in the evaluation of the gain in resistance and deformation. Estimation of the bearing capacity of mixed columns.
• An experimental program carried out at the level of the civil engineering laboratory. Eighteen (18) steel tube specimens filled with self-placing concrete were tested for uni-axial compression, for different parameters, with incremental force-displacement acquisition to failure. Four (04) non-confined concrete specimens were subjected to a standard compression test. The analysis and discussion of the results allowed us: to establish a law of behavior of the composite material. To refine the correlation between theoretical and experimental model.
• A study on a real case of bridge was applied to estimate the levels of performance (capacity of resistance and deformation) after reinforcement of the stack of this structure by the technique of lining and thus to value the gain in resistance and deformation.Diplôme : Doctorat en sciences En ligne : ../theses/gcivil/CHA7397.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11047 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHA/7397 CHA/7397 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de pérformance des poteaux mixtes acier-béton sous différentes sollicitations Type de document : texte imprimé Auteurs : Radia Belounis ; Univ. de Constantine, Éditeur scientifique ; Mostefa Mimoune, Directeur de thèse Année de publication : 2008 Importance : 138 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : Poteaux mixtes Ductilité Rigidité Elancement Confinement Tube Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=590 Etude de pérformance des poteaux mixtes acier-béton sous différentes sollicitations [texte imprimé] / Radia Belounis ; Univ. de Constantine, Éditeur scientifique ; Mostefa Mimoune, Directeur de thèse . - 2008 . - 138 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : Poteaux mixtes Ductilité Rigidité Elancement Confinement Tube Index. décimale : 624 Génie civil Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=590 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/5070 BEL/5070 Thèse Bibliothèque principale Thèses Disponible
Titre : Introduction à la modélisation physique numérique de la dynamique des porteurs dans les hrerostructures à gaz 2D Type de document : texte imprimé Auteurs : Salim Toubal ; Univ. de Constantine, Éditeur scientifique ; M. Marir, Directeur de thèse Année de publication : 2002 Importance : 111 f. Note générale : 01 disponible dans la salle de recherche
02 disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Confinement hétérostructure puits quantique Fonction d'onde Gaz d'électrons fonction d'Airy Index. décimale : 621 Electronique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=2497 Introduction à la modélisation physique numérique de la dynamique des porteurs dans les hrerostructures à gaz 2D [texte imprimé] / Salim Toubal ; Univ. de Constantine, Éditeur scientifique ; M. Marir, Directeur de thèse . - 2002 . - 111 f.
01 disponible dans la salle de recherche
02 disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Confinement hétérostructure puits quantique Fonction d'onde Gaz d'électrons fonction d'Airy Index. décimale : 621 Electronique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=2497 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité TOU/3806 TOU/3806 Thèse Bibliothèque principale Thèses Disponible Permalink
