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Analysis of a Three-Dimensional Tank-Liquid-Soil Interaction Problem
R. Seeber and F. D. Fischer
J. Pressure Vessel Technol. -- February 1990 -- Volume 112, Issue 1, 28
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Effects of infill walls on base responses and roof drift of reinforced concrete buildings under time-history loading
Author: M. Metin Kose, Ozge Karslioglu | Size: 0.97 MB | Format:PDF | Quality:Original preprint | Publisher: The Structural Design of Tall and Special Buildings,Volume 20, Issue 3 | Year: April 2011 | pages: 402–417 | ISSN: 1541-7808
Abstract
In this study, the effects of infill walls on base reaction and roof drift of reinforced concrete frames were investigated. These effects were studied using 3D finite element method on 216 building models. Number of floors, number of bays, ratio of shear walls and ratio of infilled bays were selected as parameters. Sensitivity analysis was performed to determine the effect of each parameter on base shear, normal base reaction and roof drift. Based on the sensitivity analysis, the percentage of shear walls was the most important parameter affecting base shear, normal base reaction and roof drift. The effect of infill walls on base shear, normal base reaction and roof drift decreased when the percentage of the shear walls increased. The models without any infill walls had minimal normal base reaction under time-history loading. However, an increase in the percentage of infill walls led to an increase in normal base reaction. The roof drift of the models was not critical.
Finite element analysis and seismic rehabilitation of a 1000-year-old heritage listed tall masonry mosque
Author: A.. Mortezaei, A. Kheyroddin, H. R. Ronagh | Size: 3.46 MB | Format:PDF | Quality:Original preprint | Publisher: The Structural Design of Tall and Special Buildings, Volume 21, Issue 5 | Year: May 2012 | pages: 334–353 | ISSN: 1541-7808
Abstract
Architectural heritage is not only culturally important but also economically vital as it is a great support for tourism and leisure industries bringing in billions of dollars to otherwise ailing economies of many older regions of the world. Protecting these often very heavy masonry structures in high seismic zones is a challenge that is of great concern for authorities, researchers and engineers alike. Post-Islamic monumental buildings of Persia are among the world's most beautiful heritage listed architecture. Every large city in Iran has a mosque called ‘Masjed-e-Jam'e’ meaning the great mosque. This is the mosque in which the Friday prayer (a social must for Muslims) is often held. These mosques are large, always with tall minarets and often with a huge gathering area called ‘Ivan’ that are identifiable by their huge walls and dome or semi-dome shaped roofs. The structure of the building and minarets is often made of bricks laid with lime mortar; and as such they are heavy elements most susceptible to earthquake's ground acceleration.
This paper presents the results of an analysis of the structural behaviour and seismic vulnerability of the ‘Masjed-e-Jame’ of Semnan, a heritage listed building dating back to 11th century AD. The analytical tool used here is a nonlinear static/dynamic finite element method. Using this tool and comparing demand versus capacity confirms the susceptibility of the building to extensive damage and possibility of collapse, as is frequently observed in this type of buildings. Another aspect of the study presented here has been the evaluation of the actual efficiency of current techniques of repair and strengthening of these structures. It is shown that usual structural reinforcement techniques are effective in providing increased seismic capacity. The paper advocates that significant information can be obtained from advanced numerical analysis, with respect to the understanding of existing damage and design of strengthening system.
Seismic evaluation of a 56-storey residential reinforced concrete high-rise building based on nonlinear dynamic time-history analyses
Author: Siamak Epackachi, Rasoul Mirghaderi, Omid Esmaili, Ali Asghar Taheri Behbahani, Shahram Vahdani | Size: 3.46 MB | Format:PDF | Quality:Original preprint | Publisher: The Structural Design of Tall and Special Buildings, Volume 21, Issue 4 | Year: April 2012 | pages: 233–248 | ISSN: 1541-7808
Abstract
In recent decades, shear walls and tube structures have been the most appropriate structural forms for the construction of high-rise concrete buildings. Thus, recent Reinforced Concrete (RC) tall buildings have more complicated structural behaviour than before. Therefore, studying the structural systems and associated behaviour of these types of structures is very important. The main objective of this paper is to study the linear and nonlinear behaviour of one of the tallest RC buildings, a 56-storey structure, located in a high seismic zone in Iran. In this tower, shear wall systems with irregular openings are utilized under both gravity and lateral loads and may result in some especial issues in the behaviour of structural elements such as shear walls and coupling beams. The analytical methodologies and the results obtained in the evaluation of life-safety and collapse prevention of the building are also discussed. The weak zones of the structure based on the results are introduced, and a detailed discussion of some important structural aspects of the high-rise shear wall system with consideration of the concrete time dependency and constructional sequence effects is also included.
All three papers inside 5.11Mb Rar file / no pass.
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Fluidization Dynamics has been written for students and engineers who find themselves involved with problems concerning the fluidized state. It presents an analysis that focuses directly on the problem of predicting the fluid dynamic behaviour of a proposed fluidized system for which empirical data is limited or unavailable.
The second objective is to provide a treatment of fluidization dynamics that is readily accessible to the non-specialist. The linear approach adopted in this book, starting with the formulation of predictive expressions for the basic forces that act on a fluidized particle, offers a clear way into the theory. The incorporation of the force terms into the conservation equations for mass and momentum and subsequent applications are presented in a manner that requires only the haziest recollection of elementary fluid-dynamics theory.
The analyses presented in this book represent a body of research that has appeared in numerous publications over the last 20 years. L.G. Gibilaro has taken the opportunity to reorder much of the material in the light of subsequent knowledge, to correct minor errors and inconsistencies and to add detail and clarification where necessary. This material helps to form the basis for university course modules in engineering and applied science at undergraduate and graduate level, as well as focused, post-experienced courses for the process, and allied industries.
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Author: R. Peter King | Size: 3.89 MB | Format:PDF | Quality:Original preprint | Publisher: Butterworth-Heinemann | Year: January 9, 2003 | pages: 198 | ISBN: 0750648856, ISBN-13: 978-0750648851
Introduction to Practical Fluid Flow provides essential information on the the solution of practical fluid flow and fluid transportation problems through the application of fluid dynamics.
Emphasising the solution of practical operating and design problems using the latest methods, the text concentrates on computer-based methods throughout, in keeping with modern trends in engineering. With a focus on the flow of slurries and non-Newtonian fluids, it will be useful for and engineering students who have to deal with practical fluid flow problems.
The book is supported by an accompanying CD ROM which provides a toolbox of computer methods. These enable readers to use all of the problem solving methods shown in the book's illustrated examples. Emphasises flow of slurries and Non-Newtonian fluids.
Covers the application of fluid dynamics to the solution of practical fluid flow and fluid transportation problems.
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CD ROM is not included.
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This fascinating work makes the link between the rarified world of maths and the down-to-earth one inhabited by engineers. It introduces and explains classical and modern mathematical procedures as applied to the real problems confronting engineers and geoscientists. Written in a manner that is understandable for students across the breadth of their studies, it lays out the foundations for mastering difficult and sometimes confusing mathematical methods. Arithmetic examples and figures fully support this approach, while all important mathematical techniques are detailed. Derived from the author's long experience teaching courses in applied mathematics, it is based on the lectures, exercises and lessons she has used in her classes.
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Author: George Z. Voyiadjis, Peter I. Kattan | Size: 1.61 MB | Format:PDF | Quality:Original preprint | Publisher: Springer | Year: July 22, 2005 | pages: 336 | ISBN: 3540243534, ISBN-13: 978-3540243533
This textbook makes use of the popular computer program MATLAB as the major computer tool to study mechanics of composite materials. It is written specifically for students in engineering and materials science, examining step-by-step solutions of composite material mechanics problems using MATLAB. Each of the 12 chapters is well structured and includes a summary of the basic equations, MATLAB functions used in the chapter, solved examples and problems for students to solve. The main emphasis of Mechanics of Composite Materials with MATLAB is on learning the composite material mechanics computations and on understanding the underlying concepts. The solutions to most of the given problems appear in an appendix at the end of the book.
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Computational Fluid Dynamics (CFD) is an important design tool in engineering and also a substantial research tool in various physical sciences. The objective of this book is to provide a solid foundation for understanding the numerical methods employed in today's CFD and to raise awareness of modern CFD codes through hands-on experience. The book should be a useful reference work for engineers and scientists starting to work in the field of CFD or those who apply CFD codes. The accompanying CD-ROM contains the sources of 1-D and 2-D Euler solvers as well as grid generators.
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This book is concerned with the topical problems of mechanics of advanced composite materials whose mechanical properties are controlled by high-strength and high-stiffness continuous fibers embedded in polymeric, metal, or ceramic matrix. Although the idea of combining two or more components to produce materials with controlled properties has been known and used from time immemorial, modern composites were only developed several decades ago and have now found intensive application in different fields of engineering, particularly in aerospace structures for which high strength-to-weight and stiffness-to-weight ratios are required.
There already exist numerous publications that cover anisotropic elasticity, mechanics of composite materials, design, analysis, fabrication, and application of composite structures but the difference between this book and the existing ones is that this is of a more specific nature. It covers specific features of material behaviour such as nonlinear elasticity, plasticity, creep, and structural nonlinearity and discusses in detail the problems of material micro- and macro-mechanics that are only slightly touched in existing books, e.g. stress diffusion in a unidirectional material with broken fibers, physical and statistical aspects of fiber strength, coupling effects in anisotropic and laminated materials, etc.
The authors are designers of composite structures who were involved in practically all the main Soviet and then Russian projects in composite technology, and the permission of the Russian Composite Center - Central Institute of Special Machinery (CRISM) to use in this book the pictures of structures developed and fabricated in CRISM as part of the joint research and design project is much appreciated.
Mechanics and Analysis of Composite Materials consists of eight chapters progressively covering all structural levels of composite materials from their components through elementary plies and layers to laminates.
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Recommendations for the Structural Design of Flexible Pavements
Author: Santiago Corro | Size: 2.63 MB | Format:PDF | Quality:Unspecified | Publisher: Instituto de Ingenieria of the Universidad Autonoma de Mexico | Year: 1978 | pages: 41 | ISBN: NA
A semi-empirical method for the design of flexible road pavements is presented. It is based on the research conducted through the Institute of Engineering (experimental test roads evaluation of existing highways and circular test-track) from 1962 to 1973.
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