Documents disponibles chez cet éditeur

Collapse of thin concrete shells of revolution under thermal loading / Ali Nadjai 

Public ISBD Titre : Collapse of thin concrete shells of revolution under thermal loading Type de document : texte imprimé Auteurs : Ali Nadjai, Auteur ; Graham Baker, Directeur de thèse ; George Coltart, Directeur de thèse Editeur : Ecosse : Heriot-Watt University Année de publication : 1988 Importance : 98 f. Présentation : ill. Format : 27 cm. Note générale : Mémoire de Master : Génie Civil : Royaume-Uni, Heriot-Watt University : 1988 Bibliogr. f. 99 - 103 . Annexe [43] f Langues : Anglais (eng) Mots-clés : Isotropic  concrete  shells Finite  element  method Axisymmetric  elements Elastic  range Elastic-plastic  analysis Index. décimale : Ms00188 Résumé : The demand for large clear span buildings of elegant shape and moderate cost has lead to an increasing interest in shell structures. Thin concrete shells are relatively easy to design and construct. Unfortunately temperature changes can give rise to significant strains. A number of shell collapses have been attributed to temperature effects. In order to enable structural engineers to allow for temperature effects it is necessary to investigate these analytically. This thesis presents a review of temperature effects in concrete and gives a numerical analysis of thin isotropic concrete shells of revolution under thermal loading. The analysis utilises the finite element method with axisymmetric elements which are more economic than general elements. Programs are given for use in the elastic and elastic-plastic range. In the elastic-plastic analysis an incremental iterative tangent stiffness technique is used, which can be employed for different yield criterion (Tresca, Von Mises, Mohr-Coulomb and Drucker-Prager). Flowcharts, listings and instructions for use of the programs are given. Collapse of thin concrete shells of revolution under thermal loading [texte imprimé] / Ali Nadjai, Auteur ; Graham Baker, Directeur de thèse ; George Coltart, Directeur de thèse . - Ecosse : Heriot-Watt University, 1988 . - 98 f. : ill. ; 27 cm. Mémoire de Master : Génie Civil : Royaume-Uni, Heriot-Watt University : 1988 Bibliogr. f. 99 - 103 . Annexe [43] f Langues : Anglais (eng) Mots-clés : Isotropic  concrete  shells Finite  element  method Axisymmetric  elements Elastic  range Elastic-plastic  analysis Index. décimale : Ms00188 Résumé : The demand for large clear span buildings of elegant shape and moderate cost has lead to an increasing interest in shell structures. Thin concrete shells are relatively easy to design and construct. Unfortunately temperature changes can give rise to significant strains. A number of shell collapses have been attributed to temperature effects. In order to enable structural engineers to allow for temperature effects it is necessary to investigate these analytically. This thesis presents a review of temperature effects in concrete and gives a numerical analysis of thin isotropic concrete shells of revolution under thermal loading. The analysis utilises the finite element method with axisymmetric elements which are more economic than general elements. Programs are given for use in the elastic and elastic-plastic range. In the elastic-plastic analysis an incremental iterative tangent stiffness technique is used, which can be employed for different yield criterion (Tresca, Von Mises, Mohr-Coulomb and Drucker-Prager). Flowcharts, listings and instructions for use of the programs are given.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms00188	Ms00188	Papier	Bibliothèque centrale	Mémoire de Master	Disponible

Documents numériques

ALI.Nadjai.pdf URL

Investigation of behaviour of tall staggered wall buildings / Kada, Abdelhak

Public ISBD Titre : Investigation of behaviour of tall staggered wall buildings Type de document : texte imprimé Auteurs : Kada, Abdelhak, Auteur ; A. W. Irwin, Directeur de thèse Editeur : Ecosse : Heriot-Watt University Année de publication : 1988 Importance : 56 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Civil : Ecosse, Heriot-Watt University : 1988 Bibliogr. f. 57 - 59 . Annexe [38] f Langues : Anglais (eng) Mots-clés : Shear  wall  buildings Tall  staggered  wall  --  behaviour Tall  staggered  wall  --  static  analysis Tall  staggered  wall  --  dynamic  analysis Index. décimale : Ms00588 Résumé : In this research the behaviour of staggered shear wall buildings has been investigated. Past work in shear wall structures is briefly reviewed. An analytical approach based on a combination of beam elements and the continuous connection technique, which may be used to predict the behaviour of staggered wall building, is described. Simplifications implemented in the analytical problem are explained and the final idealized mathematical models of the staggered wall structures are presented. The fabrication of a complete perspex high rise staggered wall structure, the apparatus used to carry out static and dynamic tests on the model and the various procedures used to deflect and vibrate the model are described. The results obtained from each series of tests on the model structures are presented and comparison is made with values obtained from theoretical analyses. These results which include deflection curves for different values of equal horizontal point loads, and strain plottings are presented. Curves are also presented for mode shapes and frequency/amplitude relationships. Investigation of behaviour of tall staggered wall buildings [texte imprimé] / Kada, Abdelhak, Auteur ; A. W. Irwin, Directeur de thèse . - Ecosse : Heriot-Watt University, 1988 . - 56 f. : ill. ; 30 cm. Mémoire de Master : Génie Civil : Ecosse, Heriot-Watt University : 1988 Bibliogr. f. 57 - 59 . Annexe [38] f Langues : Anglais (eng) Mots-clés : Shear  wall  buildings Tall  staggered  wall  --  behaviour Tall  staggered  wall  --  static  analysis Tall  staggered  wall  --  dynamic  analysis Index. décimale : Ms00588 Résumé : In this research the behaviour of staggered shear wall buildings has been investigated. Past work in shear wall structures is briefly reviewed. An analytical approach based on a combination of beam elements and the continuous connection technique, which may be used to predict the behaviour of staggered wall building, is described. Simplifications implemented in the analytical problem are explained and the final idealized mathematical models of the staggered wall structures are presented. The fabrication of a complete perspex high rise staggered wall structure, the apparatus used to carry out static and dynamic tests on the model and the various procedures used to deflect and vibrate the model are described. The results obtained from each series of tests on the model structures are presented and comparison is made with values obtained from theoretical analyses. These results which include deflection curves for different values of equal horizontal point loads, and strain plottings are presented. Curves are also presented for mode shapes and frequency/amplitude relationships.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms00588	Ms00588	Papier	Bibliothèque centrale	Mémoire de Master	Disponible

The use of micro-computers into small businesses / Tidjani Berregui

Public ISBD Titre : The use of micro-computers into small businesses Type de document : texte imprimé Auteurs : Tidjani Berregui, Auteur ; Ian Graham, Directeur de thèse Editeur : Ecosse : Heriot-Watt University Année de publication : 1985 Importance : 183 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Génie Industriel : Ecosse, Heriot-Watt University : 1985 Bibliogr. [11] f Langues : Anglais (eng) Mots-clés : Micro-computers Small  businesses Hardware Software Index. décimale : Ms01185 Résumé : In the space of no more than a decade, the micro-computer has been through much the same pattern of evolution as the mainframe computer took forty years to accomplish. Progress in micro-computing has so far been exceedingly rapid and haphazard. Hence, the attention of the world is now directed at new products and emergent technologies, such as the new micro-computers that are launched each month and for which growth expectations are extremely high. The use of computers has been spreading rapidly since the Mid-60s. Recently, the availability of micro-computers at prices which even the smallest business can contemplate, has led to a sudden acceleration in the rate of adoption of computer applications. For many existing small businesses, it is the micro-revolution which could be of most help. Thus, the choice is made and the rapid pace of technology has led, in some areas, to rapid absolescence, and in all areas to falling prices for a given level of power. The present study is about the use of micro-computers into small businesses, its purpose is to provide a basis on which a small businessman can build a successful micro-computer implementation process. The research is also of value in that there is relatively little published academic or commercial research in the area. The main problem encountered during the research was the lack of research texts about the subject. Information, therefore, has had to be collected from a great deal of articles available in various computer magazines, newspapers, reviews and other sources. To carry out the study, both desk and field research were used. The former consisted of collecting data from books, magazines, periodicals, reviews and newspapers; while the latter consisted of survey using a questionnaire distributed to a sample of small businesses in Scotland. The dissertation begins by describing the main computers development from the first computer to the introduction of the micro-computers. It also outlines the major difficulties faced by most writers in giving an exact definition to small business and the various yardsticks by which small businesses are measured. The major hardware components that make up a micro-computer, system and the software that makes the micro-computer system perform its variousdifferent tasks, are discussed in some detail. A discussion of how a small business might go about establishing a computer system is also provided. The different types of suppliers and some of the typical hardware and software items available in the market are presented along with a discussion of how well the market satisfies the different users' needs. Research methodology with general background about the methodological perspectives and the method used in carrying out the present research, is discussed, including the formation of the questionnaire, the sample process, objectives of the survey, etc. A discussion of the data gathered from the survey is provided. Lastly, opportunities for further research are briefly discussed. The use of micro-computers into small businesses [texte imprimé] / Tidjani Berregui, Auteur ; Ian Graham, Directeur de thèse . - Ecosse : Heriot-Watt University, 1985 . - 183 f. : ill. ; 30 cm. Mémoire de Master : Génie Industriel : Ecosse, Heriot-Watt University : 1985 Bibliogr. [11] f Langues : Anglais (eng) Mots-clés : Micro-computers Small  businesses Hardware Software Index. décimale : Ms01185 Résumé : In the space of no more than a decade, the micro-computer has been through much the same pattern of evolution as the mainframe computer took forty years to accomplish. Progress in micro-computing has so far been exceedingly rapid and haphazard. Hence, the attention of the world is now directed at new products and emergent technologies, such as the new micro-computers that are launched each month and for which growth expectations are extremely high. The use of computers has been spreading rapidly since the Mid-60s. Recently, the availability of micro-computers at prices which even the smallest business can contemplate, has led to a sudden acceleration in the rate of adoption of computer applications. For many existing small businesses, it is the micro-revolution which could be of most help. Thus, the choice is made and the rapid pace of technology has led, in some areas, to rapid absolescence, and in all areas to falling prices for a given level of power. The present study is about the use of micro-computers into small businesses, its purpose is to provide a basis on which a small businessman can build a successful micro-computer implementation process. The research is also of value in that there is relatively little published academic or commercial research in the area. The main problem encountered during the research was the lack of research texts about the subject. Information, therefore, has had to be collected from a great deal of articles available in various computer magazines, newspapers, reviews and other sources. To carry out the study, both desk and field research were used. The former consisted of collecting data from books, magazines, periodicals, reviews and newspapers; while the latter consisted of survey using a questionnaire distributed to a sample of small businesses in Scotland. The dissertation begins by describing the main computers development from the first computer to the introduction of the micro-computers. It also outlines the major difficulties faced by most writers in giving an exact definition to small business and the various yardsticks by which small businesses are measured. The major hardware components that make up a micro-computer, system and the software that makes the micro-computer system perform its variousdifferent tasks, are discussed in some detail. A discussion of how a small business might go about establishing a computer system is also provided. The different types of suppliers and some of the typical hardware and software items available in the market are presented along with a discussion of how well the market satisfies the different users' needs. Research methodology with general background about the methodological perspectives and the method used in carrying out the present research, is discussed, including the formation of the questionnaire, the sample process, objectives of the survey, etc. A discussion of the data gathered from the survey is provided. Lastly, opportunities for further research are briefly discussed.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms01185	Ms01185	Papier	Bibliothèque centrale	Mémoire de Master	Disponible