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Distinct Element Modelling in Geomechanics

Author: K R Saxena; R D Woods
Publisher: Boca Raton : Routledge, 2018.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
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  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Print version:
Saxena, K.R.
Distinct Element Modelling in Geomechanics.
Boca Raton : Routledge, ©2018
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: K R Saxena; R D Woods
ISBN: 9781351454735 1351454730
OCLC Number: 1082221073
Description: 1 online resource (235 pages)
Contents: Cover; Half Title; Title Page; Copyright Page; Preface; Table of Contents; The Contributors; 1 The Excavation Damage Zone --
An International Perspective; 2 Improved Design in Rock and Soil Engineering with Numerical Modelling; 3 Micromechanical Modelling of Granular Media: The Power of Discrete Element Modelling; 4 Discrete Element Analysis of Dam Foundations; 5 Earthquake Analysis of Concrete Gravity Dams on Jointed Rock Foundations; 6 Considerations for Threed-imensional Modelling in Analysis of Underground Excavations

Abstract:

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 â€" 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.

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