Geomechanics from Micro to Macro contains 268 papers presented at the International Symposium on Geomechanics from Micro and Macro (IS-Cambridge, UK, 1-3 September 2014). The symposium created a forum for the dissemination of new advances in the micro-macro relations of geomaterial behaviour and its modelling. The papers on experimental investigati
Soils are composed of grains but they are generally treated as continua in the classical framework of geomechanics. Their macroscopic response under loading, such as their non-linearity, yielding and anisotropy, is controlled by their micro-structure, the characteristics of the grains and the disposition of contacts between them. There have been rapid advances in technology both to investigate the microscopic properties of soils, and to simulate their granular behaviour explicitly through Discrete Element Method (DEM). DEM was originally used to reproduce element tests, but it is now being advocated for boundary-value problems. Geomechanics and Geotechnics: From Micro to Macro includes 174 peer-reviewed papers presented at the International Symposium on Geomechanics and Geotechnics: From Micro to Macro (IS-Shanghai 2010, Shanghai, China, 10-12 October 2010). The symposium provided an opportunity for the exchange of ideas and information on experiments, numerical models and engineering applications related to the discrete nature of geomaterials. The main goal was to explore further advances in the use of micro-geomechanical approaches, and by doing so to improve the understanding of macro-geomechanical phenomena by offering experiments, constitutive relations, numerical analyses and engineering applications associated with the discrete nature of geomaterials. Geomechanics and Geotechnics: From Micro to Macro will be of interest to academics and engineers involved in Soil Mechanics, Geomechanics, Geotechnical Engineering, Geoengineering and Civil Engineering.
Microscopic re-examination of geomaterials consisting of aggregates can shed light on macroscopic behaviour, including compressibility, anisotropy, yielding, creep, cyclic liquefaction and shear rupture. As a result of this process of examination, new methods of material characterization emerge, leading to a greater degree of accuracy in the specification of new constitutive models with physically-meaningful parameters. The impetus behind this development is an increasing awareness on sustainability, leading to the more efficient use of recycled materials for geotechnical applications. The characteristics of recycled materials, such as compressibility and self-hardening, may differ significantly from those of natural materials, and it is crucial that evaluation is made from a specifically particulate perspective.
Author : Fusao Oka
ISBN : 9781315733197
Genre : Technology & Engineering
File Size : 78.78 MB
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Computer Methods and Recent Advances in Geomechanics contains the proceedings (abstracts book 472 pages + full paper USB-drive 2052 pages) of the 14th International Conference of the International Association for Computer Methods and Advances in Geomechanics (Kyoto, Japan, 22-25 September, 2014). The contributions cover computer methods, material modeling and testing, applications to a wide range of geomechanical issues, and recent advances in various areas that may not necessarily involve computer methods, including: - Development and usage of new materials; - Constitutive modeling of materials including deformation, damage and failure; - Verification of existing and new constitutive models; - Micro-macro correlations of material response including non-destructive testing; - New techniques for material and site characterization; - Computer-aided engineering and expert system; - Innovative construction using new materials and computer methods; - Design and rehabilitation of infrastructure; - Use of system and optimization procedures, and - Remote sensing. Computer Methods and Recent Advances in Geomechanics will be of interest to researchers and engineers involved in geotechnical mechanics and geo-engineering.
Rammed Earth Construction: Cutting-Edge Research on Traditional and Modern Rammed Earth is a collection of peer-reviewed papers presented at the First International Conference on Rammed Earth Construction (ICREC2015, University of Western Australia, Perth, Western Australia, 10-13 February 2015) by academics, engineers and rammed earth practitioners from around the world. The topics discussed in the book include: • Construction procedures • Durability assessment • Material characterisation • Seismic design • Soil suitability • Structural and thermal performance • Traditional and stabilised rammed earth structures Rammed Earth Construction: Cutting-Edge Research on Traditional and Modern Rammed Earth will be a valuable reference for academics, engineers and practitioners for describing the state-of-the-art in rammed earth research and understanding.
Linear mathematical assumptions for procedures in other branches of engineering have little relevance for geoengineering, which must accommodate non-linear behaviors. Contributors to eight papers apply the breakthrough numerical modeling Distinct Element Method (Cundall, late 1960s). The design philosophy for structures or excavations in geotechnical engineering is different from that followed for fabricated materials like steel and concrete. The designer has little data both with regard to geological weaknesses and strength and deformation characteristics of materials before finalizing the designs. Also these characteristics vary from place to place. In-situ stresses due to gravity and tectonics and transient forces imposed due to rainfall and earthquakes make the matter more complicated. The pore waters carry the load initially before passing it on to the solids. For the analytical procedure, to be realistic, it should account for large displacements and non-linear behaviour including strain-softening. Because of these considerations, the designers have followed procedures based on simplifying assumptions such as linear, small strain, elastoplastic behaviour. Numerical procedures based on such assumptions, though very popular in other branches of engineering, have made little impact in geo-engineering. An attempt has been made in this book to compile the recent use of distinct element codes for solutions of some of the problems in geomechanics — particularly those involving excavations. It is hoped that it will provide an opportunity for the fraternity of geotechnical engineers to appreciate the opening of new frontiers in the use of computers for solving more challenging geotechnical problems.
Reflecting the current research and advances made in the application of numerical methods in geotechnical engineering, this volume details proceedings of the Ninth International Symposium on 'Numerical Models in Geomechanics - NUMOG IX' held in Ottawa, Canada, 25-27 August 2004. Highlighting a number of new developments in the area, papers concentrate upon the following four main areas: * constitutive relations for geomaterials * numerical algorithms: formulation and performance * modelling of transient, coupled and dynamic problems * application of numerical techniques to practical problems. Representing the most advanced, modern findings in the field, Numerical Models in Geomechanics is a comprehensive and impeccably-researched text, ideal for students and researchers as well as practising engineers.
Author : Musharraf Zaman
ISBN : 0471492183
Genre : Science
File Size : 45.88 MB
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Modeling in Geomechanics Edited by Musharraf Zaman The University of Oklahoma, USA Giancarlo Gioda Politecnico di Milano, Italy John Booker University of Sydney, Australia Geomechanics is an interdisciplinary field involving the study of natural and man-made systems with emphasis on the mechanics of various interacting phenomena. It comprises numerous aspects of engineering and scientific disciplines, which share common bases in mathematics, mechanics and physics. In recent years, with the extraordinary growth of computing power and resources, progress in the generation of new theories and techniques for the analysis of geomechanics problems has far surpassed their actual use by practitioners. This has led to a gap between our ability to deal with complex, inter-disciplinary problems in geomechanics and the actual impact of these advances on engineering practice. This book contains contributions from an international group of accomplished researchers and practitioners from various branches of soil and rock engineering, and presents the latest theoretical developments and practical applications of modeling in geomechanics. Chapters are grouped into four main sections: * Computational procedures * Constitutive modeling and testing * Modeling and simulation * Applications Efforts have been made to include recent developments and provide suggestions and examples as to how these can be applied in modeling actual engineering problems. Researchers, practitioners and students in geomechanics, mechanics of solids, soil and rock engineering will find this book an invaluable reference.
Author : Laurent Vulliet
ISBN : 2880745152
Genre : Rock mechanics
File Size : 70.91 MB
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Environmental Geomechanics cover a wide range of topics concerned with the mechanical behaviour of geomaterials. The problems addressed are complex, mainly due to the coexistence of several species and phases, to their interaction and their often non-linear behaviour. Experimental evidence is difficult to obtain and laboratory as well as in-situ testing procedures present serious challenges. Numerical techniques are used to solve the complex non-linear analytical systems. Integration of new models for engineering applications will require a considerable effort among engineering teams. Due to the number of phenomena influencing the solutions an interdisciplinary approach to Environmental Geomechanics is therefore necessary. The first part of the volume contains invited keynote lectures addressing various aspects of the subject of Environmental Geomechanics. It can serve as a starting point for further research thanks to its in-depth treatment and its rich bibliographic references. The second part contains various selected contributions. These reflect the broad scope of Environmental Geomechanics and appeal for more research efforts in this domain. Many practical problems relating to engineering practice are also presented which make the book an invaluable "state of the art" guide in this very important field.