1st Edition

Constitutive Modeling of Geomaterials Principles and Applications

By Teruo Nakai Copyright 2013
    376 Pages 248 B/W Illustrations
    by CRC Press

    376 Pages 248 B/W Illustrations
    by CRC Press

    Winner of the Japanese Geotechnical Society 2016 publication award

    Written by a veteran geotechnical engineer with a long record of research discoveries, Constitutive Modeling of Geomaterials: Principles and Applications presents a simple and unified approach to modeling various features of geomaterials in general stress systems. The book discusses the fundamentals of the constitutive modeling of soils and illustrates the application of these models to boundary value problems.

    Helping readers easily understand the fundamentals and modeling of soil behaviors, the author first explains the ideas and formulations for modeling soil features in one-dimensional conditions. He then extends the one-dimensional models to three-dimensional models using the tij concept. The text covers the subloading tij model and other methods that describe density, bonding, time effect, and more. Moving on to the practical application of the constitutive models, the author presents the numerical simulations of typical geotechnical problems (numerical modeling) and the corresponding model tests (physical modeling).

    Using a framework that leads to a unified set of material parameters, this book shows how to formulate a constitutive model capable of simulating the main features of soil behavior. It not only covers recent methods and models but also uses real test data to prove their reliability.

    Introduction

    PART 1: MODELING OF GEOMATERIALS
    Fundamentals of Conventional Elastoplasticity
    Introduction
    One-dimensional modeling of elastoplastic materials
    Multidimensional modeling of elastoplastic materials

    Modeling of One-Dimensional Soil Behavior
    Introduction
    Modeling of normally consolidated soils—conventional elastoplastic modeling
    Modeling of overconsolidated soils—advanced elastoplastic modeling at stage I
    Modeling of structured soils (naturally deposited soils)—advanced elastoplastic modeling at stage II
    Modeling of other features of soils—advanced elastoplastic modeling at stage III
    Loading condition using increment of total change of void ratio and explicit expression in advanced elastoplastic modeling
    Application of the advanced model (stage III) to time-dependent behavior of soil
    Meaning of present time-dependent model—common and different points to Sekiguchi model
    Simulation of time-dependent behavior of soil in one-dimensional conditions
    Application of advanced methods to modeling of some other features

    Ordinary Modeling of Three-Dimensional Soil Behavior
    Introduction
    Outline of ordinary elastoplastic models such as the Cam clay model
    Discussion on applicability of Cam clay type model in three-dimensional conditions based on test results

    Unified Modeling of Three-Dimensional Soil Behavior Based on the tij Concept
    Introduction
    Concept of modified stress tij
    Three-dimensional modeling of normally consolidated soils based on the tij concept

    Three-Dimensional Modeling of Various Soil Features Based on the tij Concept
    Introduction
    Three-dimensional modeling of overconsolidated soils—advanced elastoplastic modeling at stage I
    Three-dimensional modeling of structured soils—advanced elastoplastic modeling at stage II
    Three-dimensional modeling of other features of soils—advanced elastoplastic modeling at stage III

    Conclusions of Part 1

    PART 2: NUMERICAL AND PHYSICAL MODELING OF GEOTECHNICAL PROBLEMS
    Introduction to Numerical and Physical Modeling
    Introduction
    Modeling the interface behavior between soil and structure
    Geomaterials used in 2D and 3D model tests and their material parameters

    Tunneling
    Two-dimensional trapdoor problems
    Three-dimensional trapdoor problems
    Circular tunneling

    Earth Pressure of Retaining Walls and Bearing Capacity of Foundations
    Active and passive earth pressure behind retaining walls
    Braced open excavation
    Strip foundation and piled raft foundation

    Reinforced Soils
    Reinforced foundation under uplift loading
    Reinforcing for increasing bearing capacity

    Localization and Shear Band Development in Element Tests
    Introduction
    Outline of analyses
    Results and discussion

    Conclusions of Part 2

    References

    Index

    Biography

    Teruo Nakai is a professor at the Nagoya Institute of Technology. He has received several honors, including Best Research Paper Awards from the Japanese Geotechnical Society. He earned a Ph.D. from Kyoto University. His research interests include the testing of geomaterials and their constitutive modeling in general stress systems as well as the application of constitutive models to boundary value problems, such as tunneling, braced excavation, bearing capacity of various foundations, and reinforced soils.

    "The book is written in an easy-to-read style without frills. The style is typical of Prof. Nakai, namely correct, concise and complete. The line drawings and photos are well proportionated and reproduced with high quality. The access to the stuff is made easy by embarking on the 1D relationship at the beginning of the book, which makes it an excellent text-book for graduate students. However, the book is also highly recommended to experts who wish to brush up their knowledge in constitutive modeling. I enjoyed reading this book for my review and was rewarded with surprising goodies here and there. There are many details to be discovered."
    —Acta Geotechnica, 2013