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Geotechnik

Author: Dimitrios Kolymbas
Publisher: Springer-Verlag
ISBN: 3642204821
Size: 45.16 MB
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Sowohl das Fach Bodenmechanik als auch sein technisches Pendant, die Geotechnik sind Wissensgebiete, auf denen intensiv geforscht und neue Lösungen entwickelt werden. In dem Buch wird die inhärente Beziehung zwischen Bodenmechanik (Theorie) und Geotechnik (Praxis) dokumentiert und der rasanten Entwicklung dadurch Rechnung getragen, dass entsprechende Konzepte systematisch dargestellt werden. Die 3. Auflage wurde dem Stand der Technik angepasst, das gilt insbesondere für die Gebiete Bruchmechanik, Bodendynamik sowie Dammbau und Sickerströmungen.

On The Face Stability Of Shallow Tunnels In Sand

Author: Ansgar Kirsch
Publisher: Logos Verlag Berlin GmbH
ISBN: 3832521496
Size: 31.50 MB
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Various models have been proposed for the prediction of the necessary support pressure at the face of a shallow tunnel. To assess their quality, the collapse of a tunnel face was modelled with small scale model tests at single gravity. The evolution of the failure mechanism and the development of the support force at the face in dry sand were investigated. The observed displacement patterns show a negligible influence of overburden on the extent and evolution of the failure zone. The latter is significantly influenced, though, by the initial density of the sand: in dense sand a chimney-wedge-type collapse mechanism developed, which propagated towards the soil surface. Initially loose sand did not show any development of a discrete collapse mechanism. The necessary support force was neither influenced by the overburden nor the initial density. A comparison with quantitative predictions by several theoretical models showed that the measured necessary support pressure is overestimated by most of the models. Only those by Vermeer/Ruse and Leca/Dormieux were able to predict the necessary support pressure on a 95 % confidence level. A three-dimensional finite element investigation of face stability served to assess the ability of two constitutive models, an elastoplastic Mohr-Coulomb and a hypoplastic model, to predict the necessary support pressure and the displacements at the tunnel face. The simulation of the small scale experiments revealed that the observed necessary support pressure and incremental displacements were predicted sufficiently well with both constitutive models.

Advanced Mathematical And Computational Geomechanics

Author: Dimitrios Kolymbas
Publisher: Springer Science & Business Media
ISBN: 3540450793
Size: 27.14 MB
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Geomechanics is the mechanics of geomaterials, i.e. soils and rocks, and deals with fascinating problems such as settlements, stability of excavations, tunnels and offshore platforms, landslides, earthquakes and liquefaction. This edited book presents recent mathematical and computational tools and models to describe and simulate such problems in Geomechanics and Geotechnical Engineering. It includes a collection of contributions emanating from the three Euroconferences GeoMath ("Mathematical Methods in Geomechanics") that were held between 2000 and 2002 in Innsbruck/Austria and Horto/Greece.

Geotechnical Engineering Handbook Fundamentals

Author: Ulrich Smoltczyk
Publisher: Ernst & Sohn
ISBN: 9783433014493
Size: 43.53 MB
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Volume 1 covers the basics necessary for any construction activity in foundation engineering. This systematic introduction to the assessment of soil and rock properties provides an insight into the requirements of Eurocode 7, Parts 1 and 3. It also gives details of geotechnical laboratory and field tests and the associated equipment, concise treatments of relevant solutions provided by the theories of elasticity and plasticity and numerical methods applied to solve problems of geotechnical design. The problems of earthquakes are also explained with regard to Eurocode 8.

Shear Localization In Granular Bodies With Micro Polar Hypoplasticity

Author: J. Tejchman
Publisher: Springer Science & Business Media
ISBN: 3540705554
Size: 36.29 MB
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This book includes a numerical investigation of shear localization in granular materials within micro-polar hypoplasticity, which was carried out during my long research stay at the Institute of Soil and Rock Mechanics at Karlsruhe University from 1985 to 1996. I dedicate my book to Prof. Gerd Gudehus from Germany, the former head of the Institute of Rock and Soil Mechanics at Karlsruhe University and the supervisor of my scientific research during my stay in Karlsruhe, who encouraged me to deal with shear localization in granular bodies within micro-polar hypoplasticity. I greatly - preciate his profound knowledge, kind help constructive discussions, and collegial attitude to his co-workers. I am thankful to the both series editors: Prof. Wei Wu from Universität für Bodenkultur in Austria and Prof. Ronaldo Borja from Stanford University in USA for their helpful suggestions with respect to the contents and structure of the book. I am also grateful to Dr. Thomas Ditzinger and Mrs. Heather King from the Springer Publishing Company and SPS data processing team for their help in editing this book. Gdansk, Jacek Tejchman June 2008 Contents 1 Introduction......................................................................... 1 2 Literature Overview on Experiments........................................... 11 3 Theoretical Model.................................................................. 47 3.1 Hypoplastic Constitutive Model............................................. 47 3.2 Calibration of Hypoplastic Material Parameters........................... 60 3.3 Micro-polar Continuum........................................................ 67 3.4 Micro-polar Hypoplastic Constitutive Model.............................. 72 3.5 Finite Element Implementation................................................ 75 4 Finite Element Calculations: Preliminary Results............................

Numerical Methods In Geotechnical Engineering

Author: Michael A. Hicks
Publisher: CRC Press
ISBN: 1315751828
Size: 77.51 MB
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Numerical Methods in Geotechnical Engineering contains the proceedings of the 8th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2014, Delft, The Netherlands, 18-20 June 2014). It is the eighth in a series of conferences organised by the European Regional Technical Committee ERTC7 under the auspices of the International

High Performance Computing In Science And Engineering 02

Author: Egon Krause
Publisher: Springer Verlag
ISBN: 9783540438601
Size: 61.64 MB
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This book presents the state-of-the-art in modeling and simulation on supercomputers. Leading German research groups present their results achieved on high-end systems of the High Performance Computing Center Stuttgart (HLRS) for the year 2002. Reports cover all fields of supercomputing simulation ranging from computational fluid dynamics to computer science. Special emphasis is given to industrially relevant applications. Moreover, by presenting results for both vector sytems and micro-processor based systems the book allows to compare performance levels and usability of a variety of supercomputer architectures. It therefore becomes an indispensable guidebook to assess the impact of the Japanese Earth Simulator project on supercomputing in the years to come.