Licentiate Thesis
This thesis deals with the techniques used in the numerical analysis of cable roof structures. These structures are usually very light and flexible and require analysis methods, which take their non-linear behaviour into account. An extensive literature survey, concerned with both practical and theoretical aspects of cable roofs, is presented. Some aspects included are: structural systems, roof erection procedures, different cable types and their properties, structural details, roof loads and analysis methods. As the initial shape of a cable roof depends on the internal force distribution, it cannot be described by simple geometrical models. Special iterative methods, usually not familiar to the structural engineer, have to be utilised in order to find the pretensioned configuration of the roof. The simple force density method is presented in detail and applied to a number of different types of cable roof structures. The method worked well for structures composed of only cables, but not for structures with compression members. Three analytical finite cable elements are presented. Two elements are mathematically exact and can accurately model both taut and slack cables using only one element per cable. It is shown that the analytical elements are advantageous in modelling cable behaviour. A static analysis of the Scandinavium Arena in Gothenburg has been performed. The results from this analysis were compared with results from the original design of the same object. It was found that the bending moments in the supporting structure—the concrete ring beam—were very sensitive to its shape. This explained the large discrepancy in the bending moment distribution between the analyses. Results from a simplified method, used for preliminary calculations, agreed well with those of the more accurate finite element calculations, for a studied symmetric load case.
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Soft ground improvement: in lowland and other environments
# Paperback: 427 pages
# Publisher: Amer Society of Civil Engineers (May 1996)
# Language: English
# ISBN-10: 0784401519
# ISBN-13: 978-0784401514
Product Description
The presence of thick deposits of soft clay combined with the effects of ground subsidence cause problems for engineering constructions for lowland areas such as the Central Plain (Chao Phraya) of Thailand. The ground subsidence is caused by the excessive extraction of ground water. To mitigate such natural geological hazards, different soil/ground improvement methods have been studied, namely: mechanically stabilized earth (MSE) embankments, granular or sand compaction piles, vertical drains, and the lime/cement deep mixing method. In view of their proven performance, durability, constructibility, short time schedule, and low costs, mechanically stabilized earth (MSE) or earth reinforcement techniques seem to be very suitable and favorable above-ground soil improvement methods of embankment fills on subsiding ground. This method can be most appropriately combined with the various belowground improvement techniques such as vertical drains, sand compaction piles, and the lime/cement deep mixing method. Thus, the combined above-ground soil improvement with below-ground subsoil improvement schemes can be a viable alternative to the existing method of supporting earth embankments and landfills with precast concrete piles, which may prove detrimental and more expensive in a subsiding environment.
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This book introduces the reader to advanced methods used in the computer-based modelling of fluid processes. This includes nonhydrostatic processes such as breaking internal waves and density-driven convection, but the model code is also used to simulate an El-Niño event! The book contains 25 practical exercises, using freely available Open-Source software suites, which are widely used by the scientific community. In this book, the art of hydrodynamic modelling is made available and transparent to a wider readership. An attractive byproduct of the book is that results are animations rather than still images. Model codes and animation scripts for all exercises are supplied on a website. The reader can adopt model codes for own independent studies
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NOTE: If you like this book, buy it and tell others to buy it and support the authors.
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Principles of Soil and Plant Water Relations
Author(s): M.B.Kirkham
Publisher: Elsevier Academic Press
Published Date : 2005
Pages : 519
Format : PDF
Quality : Excellent PDF format
Language : English
ISBN-10 : 0124097510
Size : 7.80 MB
More Book Review:
This textbook is developed from lectures for a graduate class in soil-plantwater relations taught at Kansas State University. Students in the class are from a number of departments, including agronomy, biology, horticulture, forestry and recreational resources, biochemistry, and biological and agricultural engineering. The book can be used as a text for a graduate- or upper-level undergraduate courses or as a self-study guide for interested scientists. The book follows water as it moves through the soil-plant-atmosphere continuum. The text deals with principles and is not a review of recent literature. The principles covered in the book, such as Ohm’s law and Poiseuille’s law, are ageless.
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Hydrodynamics of Free Surface Flows: Modelling with the Finite Element Method
Jean Michel
Publisher: Wiley
Pages:360
2007-06-11
ISBN: 0470035587
PDF 7 MB
definitive guide for accurate state-of-the-art modelling of free surface flows
Understanding the dynamics of free surface flows is the starting point of many environmental studies, impact studies, and waterworks design. Typical applications, once the flows are known, are water quality, dam impact and safety, pollutant control, and sediment transport. These studies used to be done in the past with scale models, but these are now being replaced by numerical simulation performed by software suites called “hydro-informatic systems”. The Telemac system is the leading software package worldwide, and has been developed by Electricité de France and Jean-Michel Hervouet, who is the head and main developer of the Telemac project.
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Ground and Soil Improvement
# Editor: C. Raison 1
# Hardbound ISBN: 978-0-7277-3170-8
# Ebook ISBN: 978-0-7277-3924-7
# Publication Date: March 2004
# DOI: 10.1680/gasi.31708
Methods for improving ground and soil have undergone significant developments in recent years, particularly in terms of application and usage, and many innovative techniques have been introduced. However, it is of significance that in many areas the design process still lacks a theoretical framework.
The papers included in this volume, written by international authors, deal with a cross-section of problems faced by many practising engineers and provide advice and guidance on how these problems can be dealt with in a practical manner.
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A Finite Element Framework
for Geotechnical Applications
Based on Object-orientated Programming
Verlag der Fachvereine Hochschulverlag AG an der ETH Zurich
Peter Fritz, Xiong Zheng
Englisch
Pages: 112
2002
ISBN 3728128287
PDF 2 MB
This publication describes an alternative methodology for finite element programming based on object-oriented techniques. The concepts of object-oriented programming are outlined and it is explained, how this new paradigm facilitates design, implementation and support of large programming systems. Because the knowledge of object-oriented programs is not dispersed in the actual code, but rather localized in structures, the causal knowledge, meta knowledge and constraints may be integrated in a uniform manner. Control structures separate the external level ('what') from the internal ('how') by encapsulating the actual implementation. As programming language C++ is used.
Up till now several object-oriented finite element frameworks have been presented which are partially extendable. However, the extendibility is limited to a few specific directions, e.g. the introduction of new element types or solving strategies. Much less support is available for task control, creation of new material models, configurable field variable types or extensions of the analysis model. No framework is available which is especially designed to cover the problems encountered when dealing with geotechnical engineering. IMAGINE tries to close these gaps.
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Basic Control Volume Finite Element Methods For Fluids And Solids
Vaughan R Voller
World Scientific Publishing Company
2009
ISBN: 9812834982
184 pages
PDF
2,7 MB
The Control Volume Finite Element Method (CVFEM) is a hybrid numerical method, combining the physics intuition of Control Volume Methods with the geometric flexibility of Finite Element Methods. The concept of this monograph is to introduce a common framework for the CVFEM solution so that it can be applied to both fluid flow and solid mechanics problems. To emphasize the essential ingredients, discussion focuses on the application to problems in two-dimensional domains which are discretized with linear-triangular meshes. This allows for a straightforward provision of the key information required to fully construct working CVFEM solutions of basic fluid flow and solid mechanics problems.
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High quality scan, someone had poured coffee or tea on this copy I got from the library, bear with me:
Authors: Hsai-Yang Fang
Publisher: Chapman & Hall
Published Date: 1990-12-31
ISBN-10: 0412988917
ISBN-13: 9780412988912
First Sentence
The proper design of civil engineering structures requires adequate knowledge of subsurface conditions at the sites of the structures and, when structures are to consist of earth or rockfill materials, of subsurface conditions at possible sources of construction materials.
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It can help to calculate vibrations against wind loads...
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