Advanced Soil Mechanics (E 6246)

This course contains unique materials of advanced geomechanics. For those who wish to take a follow-up course (possibly next semester on the Application of Finite Element to Geotechnical Engineering), it is a must). With the increasing popularity of numerical methods in practise, engineers must now acquire knowledge of geomechanics. For doctoral stduents, this course is a MUST in passing the qualifying examination. Course Descriptions


Spring Semester 2007
Spring 2008

see other geotech courses

Tentative Schedule

Date
Chapter
Contents
Remarks
(the links are unavailable at the moment)
 1  1/22
1.

2.
Stresses and Strains
Definitions, In-Situ Stress and Stress Increments
States of Stress
2.1 Mohr Circle of Stress
2.2 Poles of Plane, Pole of Direction, Principal Stresses, Plane of Maximum Stress Obliquity
(handout on the course descriptions)
 Mohr circle
2
1/29

3.






2.3 Application of Mohr Circle to Soil Element Tests
States of Strain
3.1 Mohr Circle of Strain Increment
3.2 Angle of Dilation
3.3 Direction of Zero Extension and Slip Surfaces
3.4 Strain Fields from Soil Model Tests


Assignment 1 (Q1-3) 
3
2/5

4.
PART I. GRANULAR SOILS
Stress-Strain Relationships
4.1 Generalized Hooke's Law
4.2 Typical Stress-Strain Relationships - Toyoura Sand
4.3 Factors Affecting Stress-Strain Behavior
- Confining Pressure and Void Ratio
- Inherent and Induced Ainsotropy
- Principal Stress Rotation

4
2/12

[Lab: Plane Strain Compression Test] Shear Band Video PSC Test
educational copy of CRISP
5
2/19

5.


6.
4.4 Stress-Dilatamcy Relationships- Rowe, Bolton, Nova
Nonlinear Stress-Strain Modeling
5.1 Introduction
5.2 Nonlinear Elastic Models
Three-Dimensional Failure Criteria
6.1 Mohr-Colulomb Failure Criterion and b-Value
Q4
6
2/26



6.2 Geometric Representation of Stress and Stress Invariants
6.3 Three Dimensional Failure Surfaces: Tesca, Huber-von Mises, Lade
Drucker-Prager (Extended von Mises), Mohr-Coulomb, Modified Lade, Matsuoka
6.4 Experimental Validation 
  Assignment 2
7
3/4

7.
PART II. COHESIVE SOILS
Critical State Soil Mechanics

7.1 Effective Stress Path and Soil Compressibility
7.2 Critical State Line
7.3 Roscoe and Hvorslev Surfaces


3/11 8.


Critical State Models
8.1 Soil Plasticty
8.2 Stress-Strain Relationships (Volumetric Hardening)
8.3 Yield Surfaces: Original and Modified Cam-clay models


3/18

mid-term break

9
3/25

8.4 Cam-clay Parameters and Limitations
8.5 Anisotropy and Anisotropic Critical State Models (Dafalias Critical State Model)

10
4/1



9.

8.6 Cap Model
8.7 Bounding Surface Model
*Scope of Final Project: Deformation Analysis of Kansai International Airport
Elasto-Plastic Analysis for Finite Element Method
9.1 Elasto-Plastic Matrix (Dep)
9.2 Dep for Modified Cam-Clay Model
9.3 Dep for Simple Plasticity Models

11
4/8


10


.
9.4 Applications of Cam-Clay Models
9.5 Example - Excavation Analysis
Effective Stress Finite Element Analysis
10.1 Introduction - Review of Finite Element consolidation Analysis
10.2 Governing Equations for Solid Phase
10.3 Governing Equations for Fluid Phase

12
4/15


10.4 Element Types
10.5 Formulations for Solid Phase
10.6 Formulations for Fluid Phase
10.7 Integration Scheme and Numerical Ill-Conditioning
10.8 Case Studies: MIT Test Embankment and Muar Test Embankment


13
4/22
11
Time-Dependent Behavior of Clays
11.1 Introduction - Quasi-Preconsolidation, Rate Effects, Clay Minerals
11.2 Creep and Stress Relaxation
11.3 Rheological Models
11.4 Singh-Mitchell Model

14
4/29






Presentation of Final Project: Deformation Analysis of Kansai International Airport



5/13

Final Examination (4:10-7:00 pm)

update:  5/13/2008