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GL2326-Numerical simulation of the response of sandy soils treated with pre-fabricated vertical drains
ARTICLE
2009, Vytiniotis, Antonios, Master thesis, Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering
Abstract:
This research is part of the ongoing effort of the Seismic Risk Mitigation for Port Systems Grand Challenge. It addresses the problem of numerically simulating the response of sandy soils treated with earthquake drains, for liquefaction risk mitigation. This thesis describes 1)the implementation of finite 1-D elements to simulate the uncoupled mechanical and flow properties of perforated vertical (PV) drains, 2) the investigation of scaling laws for laminar and turbulent flow inside a PV-drain, 3) the validation of the numerical models using a centrifuge experiment (SSK01) performed at UC-Davis (Kamai, et al., 2008). The mechanical and flow behavior of the drains are assumed to be uncoupled. The mechanical behavior is treated as a truss element, taking into account the axial stiffness and assuming zero bending stiffness. The flow behavior is treated using the phenomenological Darcy-Weisbach equation. The elements are implemented in the Opensees framework. Two implementations are presented, one for laminar drains, and one for fully turbulent drains. Both of these implementations are used to estimate also the effect of drain storage capacity. It has been illustrated that the flow in the drains in model scale and in prototype scale might be qualitatively different. If the centrifuge model is scaled N times Reynolds number (Re) is N times larger in prototype scale, so under common situations model scale flow can be laminar even if at the prototype scale flow is fully turbulent. A methodology is presented to elect properties of model scale drains (where flow is laminar) to represent prototype drains (where flow is turbulent). Validation has been performed against SSK01 centrifuge test. Results show good agreement with experimental data. Limitations of the constitutive soil model and the selected input parameters are discussed. Model scale results validate the consideration of the storage capacity effect, and thus use of the implemented drain elements. On the other hand the need for turbulent flow (rather than laminar) drains does not affect significantly the results of the specific test used.
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Groundwater Resources: Sustainability, Management, and Restoration
Groundwater Resources: Sustainability, Management, and Restoration
Neven Kresic
Publisher: McGraw-Hill Professional
ISBN: 0071492739 edition 2008 PDF 865 pages 15,1 mb
Groundwater Sustainability is a reliable, one-stop guide containing all the information you'll need to succeed in your groundwater management and development projects. It covers virtually every aspect of the subject, from how to characterize groundwater and evaluate its resources to determining the interactions between surface water and groundwater. Packed with hundreds of illustrations, this expansive guide reviews both established and innovative aquifer restoration techniques and technologies, including the control and remediation of contaminant sources and groundwater contaminant plumes. You'll also find valuable information regarding resource augmentation, the engineering necessary for resource development, and building comprehensive databases for efficient, cost-effective assessment.
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MANUAL OF SOIL LABORATORY TESTING
Author: K.H. Head
Publisher: ELE International, John Wiley & Sons Inc, Whittles Publishing
Publication Date: Any
Edition: Any
Language: English
Publisher's Note
Completely updated and expanded, it takes into account the changes and additions to BS 1377 plus references to NAMAS requirements for tests and calibration, as well as extensive coverage of the latest ASTM Standards. A working manual for all those involved in geotechnical laboratory testing, volume one discusses basic tests for soil classification and compaction. Every test is broken down into simple stages and described step-by-step. More complex procedures are illustrated by flow diagrams and many numerical examples are given to demonstrate the methods of calculation. Volume Two covers standard laboratory tests for the measurement of soil permeability, CBR values, shear strength, and consolidation characteristics. The Third Volume contains material on effective stress triaxial tests of various kinds.
NOTE:
These books are avaible from many Editorial Companies (like ELE, Wiley, Whittles, etc). Any edition is welcome !
Mathematical Theory of Creep and Creep Rupture Folke K.G. Odqvist
Mathematical Theory of Creep and Creep Rupture
Folke K.G. Odqvist
Oxford University Press 1974
ISBN: 0198535228 210 pages Djvu 5,3 MB
Contents
1. Introduction
2. Physical background. Dislocations
3. Phenomenological approach. Uni-axial state of stress
4. Time-dependent stress. Commutative law of creep
5. Multi-axial state of stress
6. Boundary- and initial-value problems. Problems of type E and C
7. Problems of stationary creep. The elastic analogue
8. Finite deformations. Plates, membranes, and beams
9. Stability problems in creep
10. Creep rupture, uni-axial state of stress
11. Creep rupture, multi-axial state of stress
12. Creep rupture, non-homogeneous state of stress
13. Creep and rupture under given state of deformation
14. Recovery effects. Relaxation
15. Creep constants of structural metals
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Engineering Fracture Mechanics: Numerical Methods and Applications D. R. J Owen
Engineering Fracture Mechanics: Numerical Methods and Applications
D. R. J Owen
Pineridge Press 1983
ISBN: 0906674263 305 pages Djvu 4,4 MB
Contents
1.Introduction and basic expressions
2.Fracture mechanics in engineering design
3.Review of finite elements in LEFM
4.Theory and standard subroutines for two-dimensitonal elastic finite element applications
5.Stress intensity factor evaluation by finite elements in LEFM
6.Exact field modeling
7.Hybrid elements, boundary integrals and edge functions
8.Elasto-plastic finite element analysis
9.Fracture prediction in ductile materials
10.Practical applications
•Appendix I. Analytic crack element program listing
•Appendix II. Instructions for preparing input data
•Appendix III. Sample input data and line printer output
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Mechanics of Fracture: Methods of Analysis and Solutions of Crack Problems, Vol. 1 George C. Sih
Mechanics of Fracture: Methods of Analysis and Solutions of Crack Problems, Vol. 1
George C. Sih
Springer 1973
ISBN: 9001798608
568 pages Djvu
6,3 MB
Contents
•Introductory chapter: A special theory of crack propagation
•Ch 1. Solutions of plane crack problems by mapping techniques
•Ch 2. Method of Laurent series expansion for internal crack problems
•Ch 3. Asymptotic approximations to crack problems
•Ch 4. Alternating method applied to edge and surface crack problems
•Ch 5. Field singularities and related integral expressions
•Ch 6. Integral transform methods
•Ch 7. Numerical solution of singular integral equations
•Ch 8. Application of finite element method to the calculation of stress intensity factors
•Ch 9. Finite element methods for elastic bodies containing cracks
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Ace Translator employs the power of Internet machine language translation engines, and enables you to easily translate Web contents, letters, chat, and emails between major International languages.
Ace Translator supports translations between the following 58 languages:
English
French
German
Italian
Dutch
Portuguese
Spanish
Catalan
Greek
Russian
Chinese (Simplified)
Chinese (Traditional)
Japanese
Korean
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Czech
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Bulgarian
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Swedish
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Afrikaans
Swahili
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System Requirements:
Microsoft Windows 7/Vista/XP/2008/2003/2000
An active Internet connection
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IMPORTANT NOTICE: You may use this software for evaluation purposes only.
If you like it, it is strongly suggested you buy it to support the developers.
By any means you may not use this software to make money or use it for commercial purpose.
Established for 60 years, Géotechnique is the world's premier geotechnics journal, publishing the research of the highest quality on all aspects of geotechnical engineering.
Géotechnique provides access to rigorously refereed, current, innovative and authoritative research and practical papers, across the fields of soil and rock mechanics, engineering geology and environmental geotechnics. The journal also publishes articles ahead of print to ensure you receive access to the latest research as soon as it is published.
---> Moderator Note: <---
---> The RapidShare link is a 418 MB file size !!!! <---
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