Download or read book CONTRIBUTION A L ETUDE DU BETON ARME EXPANSIF APPLICATION AUX CAS DES DALLES written by TAOUFIK.. CHERIET and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE CONCERNE LE COMPORTEMENT DE DALLES DE BETON ARME EXPANSIF SOUMISES A UNE SOLLICITATION INTERNE DUE AU GONFLEMENT DU LIANT HYDRAULIQUE. LA PREMIERE PARTIE DE CE TRAVAIL CONCERNE UNE ETUDE BIBLIOGRAPHIQUE SUR LES CIMENTS ET LES BETONS EXPANSIFS, AINSI QUE L'INFLUENCE DES ARMATURES (TAUX, DIRECTION) SUR L'EXPANSION ET LES AUTOCONTRAINTES. LA DEUXIEME TRAITE DE L'ETUDE DE L'EXPANSION LIBRE OU SOUS CONTRAINTE DU LIANT UTILISE EN PRENANT EN COMPTE L'INFLUENCE DE LA DIMENSION DES GRANULATS. UNE EXPERIMENTATION SUR DES DALLES EN BETON ARME EXPANSIF NOUS A PERMIS DE CONNAITRE D'UNE PART LA DISTRIBUTION DES DEFORMATIONS ET DES CONTRAINTES ET D'AUTRE PART L'INFLUENCE DU TAUX DE FERRAILLAGE SUR L'EXPANSION ET LES AUTOCONTRAINTES. NOUS AVONS DEVELOPPE ET UTILISE DEUX MODELES PERMETTANT DE DECRIRE LE COMPORTEMENT DE CES STRUCTURES ET DE CONNAITRE LA DISTRIBUTION DES CONTRAINTES ET DES DEFORMATIONS A UN INSTANT T DONNE: UNE MODELISATION MULTICOUCHE D'UNE PART ET UNE MODELISATION EN ELEMENTS FINIS D'AUTRE PART. UNE CONFRONTATION AVEC LES VALEURS EXPERIMENTALES NOUS A PERMIS DE TESTER ET VALIDER LES DEUX MODELES. CES DEUX METHODES NUMERIQUES PERMETTENT DE MODELISER AVEC UNE BONNE PRECISION LE COMPORTEMENT DES DALLES AVEC LA SEULE CONNAISSANCE DE L'EXPANSION LIBRE ET DES CARACTERISTIQUES MECANIQUES DU BETON AINSI QUE LA GEOMETRIE DE LA STRUCTURE ETUDIEE, CE QUI EST UN AVANTAGE NON NEGLIGEABLE PAR RAPPORT AUX METHODES EXISTANTES (ACI, TSUJI)

Download or read book Contribution l tude des conditions de fissuration de dalles en b ton arm written by Mohamed Fahmy Amin Mahrous and published by . This book was released on 1980 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CONTRIBUTION A L ETUDE DU COMPORTEMENT DES DALLES EN BETON ET FIBRE SOUS SOLLICITATION DE CHOC written by MAHMOUD.. RAZANI and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE LA PRESENTE RECHERCHE EST L'ETUDE DU COMPORTEMENT DES DALLES EN BETON ARME FIBREUX VIS-A-VIS DES CHOCS MOUS. DANS LE CHAPITRE BIBLIOGRAPHIQUE, NOUS PRESENTONS, DANS UN PREMIER TEMPS, LES PRINCIPALES METHODES DE CALCUL DES SYSTEMES SIMPLES ET A MASSE REPARTIE; ENSUITE LES CAMPAGNES D'ESSAIS A GRANDE ECHELLE DE DALLES EN BETON ARME, DESTINEES A FOURNIR DES FORMULES EMPIRIQUES DE DIMENSIONNEMENT; ENFIN, LES EXPERIMENTATIONS VISANT A METTRE EN EVIDENCE L'INFLUENCE DES PRINCIPAUX PARAMETRES (CARACTERISTIQUES DU MATERIAU, GEOMETRIE DE L'EPROUVETTE, SOLLICITATION APPLIQUEE) SUR LE COMPORTEMENT MECANIQUE DES ECHANTILLONS (RESISTANCE MAXIMALE, ENERGIE DE DEFORMATION, MODE DE RUINE). LE DEUXIEME CHAPITRE CONCERNE LA CARACTERISATION EXPERIMENTALE DES MATERIAUX: NOUS METTONS EN EVIDENCE L'INFLUENCE DE LA VITESSE DE CHARGEMENT SUR LA LOI DE COMPORTEMENT DES MATERIAUX SOLLICITES EN COMPRESSION SIMPLE. LE TROISIEME CHAPITRE EST CONSACRE A L'EXPERIMENTATION DES DALLES SOUMISES A DES CHARGEMENTS STATIQUE ET DE CHOC. LES DEFORMATIONS ET DEPLACEMENTS A PLUSIEURS ENDROITS DE LA SURFACE ET DES SECTIONS DE LA DALLE, AINSI QUE LA CHARGE AU CENTRE, SONT ANALYSES. LES COURBES CHARGE-FLECHE ET MOMENT-COURBURE SONT ETABLIES. LA PREMIERE PARTIE DU DERNIER CHAPITRE CONCERNE LE CALCUL DES COURBES MOMENT-COURBURE DES SECTIONS A L'AIDE D'UN PROGRAMME NUMERIQUE PRENANT EN CONSIDERATION LES LOIS DE COMPORTEMENT COMPLETES DES MATERIAUX. DANS UN SECOND TEMPS, LA REPONSE EN COURBURE DES DALLES A LA SOLLICITATION DE CHOC EST CALCULEE A L'AIDE D'UN LOGICIEL BASE SUR LA METHODE DES ELEMENTS FINIS ET SUR LA CONSIDERATION DE DIAGRAMMES MOMENT-COURBURE BILINEAIRES DES SECTIONS DE BETON ARME, ET DE FONCTIONS DE CHARGEMENT QUELCONQUES. LA TROISIEME PARTIE CONCERNE LA MODELISATION DE LA DALLE ET DE SES APPUIS ELASTIQUES EN SYSTEME MASSE-RESSORT NON AMORTI A 2 DEGRES DE LIBERTE, ET LE CALCUL NUMERIQUE DE CE SYSTEME PAR UNE

Download or read book Contribution l tude de la s curit structurale des dalles biaises en b ton arm et pr contraint written by José Antonio Carbajal and published by . This book was released on 1991 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CONTRIBUTION A L ETUDE DES CONDITIONS DE FISSURATION DE DALLES EN BETON LEGER ARME written by Abdallah Nahhas and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJECTIF ESSENTIEL DE NOTRE TRAVAIL ETAIT DE CONTRIBUER A L'ETUDE DE L'INFLUENCE DES ARMATURES SUR LA REVERSIBILITE ET LA FISSURATION DES ELEMENTS DE STRUCTURES EN BETON LEGER SOLLICITES BIAXIALEMENT, TELLES QUE DES DALLES CARREES EN BETOVER. CE BETON EST OBTENU PAR L'INTRODUCTION DES GRANULATS LEGERS A BASE DE VERRE EXPANSE. LA MISE EN CHARGE A ETE APPLIQUEE UNIFORMEMENT SUR LA SURFACE PAR CYCLE D'AMPLITUDE CROISSANTE. LES RESULTATS EXPERIMENTAUX MONTRENT QUE LA RESISTANCE A L'IRREVERSIBILITE ET A LA FISSURATION DES DALLES ARMEES EN BETOVER DECROISSENT FORTEMENT AVEC LE POURCENTAGE D'ARMATURE EN RAISON ESSENTIELLEMENT D'UNE MICROFISSURATION INITIALE DUE AU RETRAIT DU BETON LEGER EMPECHE PAR LES ARMATURES

Download or read book Apport de la haute performance au comportement de dalles en b ton arm written by Othmane Mecheti and published by . This book was released on 2001 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail décrit dans le présent mémoire est une contribution à l'étude du comportement des dalles en bétons armé de haute performance. Il peut être considéré comme le dernier élément d'une démarche collective visant à établir l'intérêt de développer un béton armé de haute performance en tant que nouveau matériau de construction. L'étude du domaine des petites déformations et des petits déplacements, a précédé celle de l'évolution de la fissuration conduisant à la ruine, car c'est là que s'exprime le plus la haute résistance des matériaux constitutifs. Les effets néfastes du vieillissement du béton sur la résistance à la microfissuration ont été mis en évidence. Le rôle indéniable de l'acier de haute limite élastique comme bonificateur des performances de l'élément de structure dans son domaine d'utilisation a été constaté. L'examen du domaine post-élastique a permis d'observer que l'influence de la limite d'élasticité de l'armature n'est déterminante que lors de la transformation de l'élément de structure en mécanisme. Enfin une ouverture de cette recherche a été pratiquée à l'usage de l'ingénieur grâce à une simulation numérique.

Download or read book Dalles en b ton arm renforc es l aide de mat riaux composites written by Oualid Limam (Docteur ès sciences).) and published by . This book was released on 2003 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: La méthode de renforcement des ouvrages d'art ou de bâtiments par collage de matériaux composites est une pratique qui connaît actuellement un essor important. Dans cette optique, nous proposons dans ce travail d'appliquer une approche de type calcul à la rupture aux dalles ou poutres en béton armé renforcées par collage de matériaux composites afin de prévoir leur chargement de ruine. Dans un premier temps, nous avons établi un outil de calcul qui utilise des lois de comportement quelconques pour les matériaux constitutifs d'une poutre en BA renforcée et qui nous donne un comportement global de la structure. Puis, dans le cas d'un modèle de plaques multicouches membranaires, nous avons établi les équations d'équilibre, les conditions aux limites et les critères portant sur les efforts généralisés ainsi qu'une approche par l'extérieur par les vitesses généralisées et une approche par l'intérieur par les efforts généralisés. Les poutres ou dalles en BA renforcées sont alors considérées comme des tri-couches, la couche inférieure représentant le matériau composite, la couche intermédiaire le treillis d'acier et enfin la couche supérieure le béton. Le paramètre à déterminer est la force maximale appliquée provoquant la rupture. Nous avons appliqué une approche de type calcul à la rupture dans le cas d'un bi-couche et d'un tri-couche, les mécanismes de ruines incluant des discontinuités de vitesses dans les couches et aux interfaces. Enfin, les résultats obtenus dans le cadre d'essais de flexion trois points sur poutres ou sur les dalles appuyées montrent que notre modèle s'avère être prédictif pour les cas traités expérimentalement.

Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Download or read book The Mosaics of Jordan written by Sumaya el_Hassan (Principessa di Giordania.) and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In Vessel Melt Retention and Ex Vessel Corium Cooling IAEA Tecdoc No 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.

Download or read book A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Child Friendly Schools Manual written by and published by UNICEF. This book was released on 2009 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Child-Friendly Schools (CFS) Manual was developed during three-and-a-half years of continuous work, involving the United Nations Children's Fund education staff and specialists from partner agencies working on quality education. It benefits from fieldwork in 155 countries and territories, evaluations carried out by the Regional Offices and desk reviews conducted by headquarters in New York. The manual is a part of a total resource package that includes an e-learning package for capacity-building in the use of CFS models and a collection of field case studies to illustrate the state of the art in child-friendly schools in a variety of settings.

Download or read book Diagnosis Prognosis of AAR Affected Structures written by Victor E. Saouma and published by Springer Nature. This book was released on 2020-09-21 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the work of the RILEM Technical Committee 259-ISR. Addressing two complementary but fundamental issues: the kinetics of the reaction, and how this will affect the integrity of the structure (serviceability and strength), it also provides methodology for assessing past deterioration to enable readers to make engineering/science-based predictions concerning future expansion. The book is divided into six major topics: selection and interpretation of optimal monitoring system for structures undergoing expansion to monitor the progress of the swelling evolution and its consequences; development/refinement of current laboratory procedures to determine the kinetics of the reaction i.e. expansion vs (future) time, and to determine the kinetic characteristics of the time-dependent reaction to be used in a finite element simulation; extrapolation of results from structural component laboratory testing; selection of material properties based on data from existing structures affected by the alkali silica reaction or delayed ettringite formation; identification of critical features that should be present in a finite element code, development of test problems for validation, and a survey of relevant programs able to conduct a transient structural analysis of a structure undergoing chemically induced expansion; and lastly guidelines for finite element codes. The book is intended for practitioners responsible for concrete structures affected by the damaging alkali aggregate reaction, engineers dealing with aging structures, and researchers in the field.

Download or read book Publications written by Atlanta University and published by . This book was released on 1911 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reference Guide to World Literature written by Tom Pendergast and published by Saint James Press. This book was released on 2003 with total page 1174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers writers from the ancient Greeks to 20th-century authors. Includes biographical-bibliographical entries on nearly 500 writers and approximately 550 entries focusing on significant works of world literature. Each author entry provides a detailed overview of the writer's life and works. Work entries cover a particular piece of world literature in detail.

Download or read book A Phonetic Dictionary of the English Language written by Hermann Michaelis and published by . This book was released on 1913 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book fib Model Code for Concrete Structures 2010 written by fib - federation internationale du beton and published by John Wiley & Sons. This book was released on 2013-12-04 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Federation for Structural Concrete (fib) is a pre-normative organization. 'Pre-normative' implies pioneering work in codification. This work has now been realized with the fib Model Code 2010. The objectives of the fib Model Code 2010 are to serve as a basis for future codes for concrete structures, and present new developments with regard to concrete structures, structural materials and new ideas in order to achieve optimum behaviour. The fib Model Code 2010 is now the most comprehensive code on concrete structures, including their complete life cycle: conceptual design, dimensioning, construction, conservation and dismantlement. It is expected to become an important document for both national and international code committees, practitioners and researchers. The fib Model Code 2010 was produced during the last ten years through an exceptional effort by Joost Walraven (Convener; Delft University of Technology, The Netherlands), Agnieszka Bigaj-van Vliet (Technical Secretary; TNO Built Environment and Geosciences, The Netherlands) as well as experts out of 44 countries from five continents.