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GEOTECHNICAL ANALYSES BY P.K.BENERJEE AND R.BUTTERFIELD
GEOTECHNICAL ANALYSES BY P.K.BENERJEE AND R.BUTTERFIELD
PUBLISHERS
: ELSEVIER APPLIED SCIENCE
: ELSEVIER APPLIED SCIENCE
Geotechnical
engineers have to deal with complex geometrical configurations as well as
enormously difficult materials which exhibit, strongly, a path-dependent
mechanical behavior. In addition, geological deposits display extensive
inhomogeneities which are often difficult to define quantitatively. As a result
most geotechnical engineering design problems require significant use of the
engineer’s imagination, creativity, judgment, common sense and experience. To
many geotechnical engineers therefore the role of any advanced analysis,
particularly advanced computer based analyses, remains undefined. The editors
have therefore invited some outstanding engineers who are engaged not only in developing
advanced level geotechnical analyses, but are also in consulting practice to
write various chapters of this book. These chapters show that a careful blend
of engineering judgment and advanced principles of engineering mechanics may be
used to resolve many complex geotechnical engineering problems. It is hoped
that these may inspire geotechnical engineering practice to make more extensive
use of them in the future.
engineers have to deal with complex geometrical configurations as well as
enormously difficult materials which exhibit, strongly, a path-dependent
mechanical behavior. In addition, geological deposits display extensive
inhomogeneities which are often difficult to define quantitatively. As a result
most geotechnical engineering design problems require significant use of the
engineer’s imagination, creativity, judgment, common sense and experience. To
many geotechnical engineers therefore the role of any advanced analysis,
particularly advanced computer based analyses, remains undefined. The editors
have therefore invited some outstanding engineers who are engaged not only in developing
advanced level geotechnical analyses, but are also in consulting practice to
write various chapters of this book. These chapters show that a careful blend
of engineering judgment and advanced principles of engineering mechanics may be
used to resolve many complex geotechnical engineering problems. It is hoped
that these may inspire geotechnical engineering practice to make more extensive
use of them in the future.
Because of
the difficulties associated with complex geometries and material behavior it is
not surprising that the advanced analyses described in this book make extensive
use of modern digital computers. Simplified hand calculations, although they
have the attraction of being very good teaching tools, are rarely able to
quantitatively reproduce the complete physical characteristics of the problem.
the difficulties associated with complex geometries and material behavior it is
not surprising that the advanced analyses described in this book make extensive
use of modern digital computers. Simplified hand calculations, although they
have the attraction of being very good teaching tools, are rarely able to
quantitatively reproduce the complete physical characteristics of the problem.
Chapter 1
deals with the complex interactions between fluid and solid skeletons for both
static and dynamic loading. The governing equations for the solid and fluid constituents
have been set out in a general manner and a nonlinear transient finite element
formulation for the problem developed. A centrifuge model test of a dike is
then simulated by the analysis, and the success of the developed analysis was
demonstrated by the ability of the analytical model to reproduce the physical
observations in the centrifuge model. Because the method of construction used
has often significant influence on the mechanical behavior of geotechnical
engineering structures, the next three chapters describe modifications to the
finite element formulation to take account of construction induced events.
Chapter 2 investigates the effects of compaction-induced stresses on the
behavior of retaining walls and buried flexible culverts. Chapter 3 describes
the use of an anisotropic soil model in the simulation of excavations. Such
unloading problems in saturated clay, which result in a transient safety factor
diminishing with time, can create dangers on many construction sites. Chapter 4
shows the finite element analysis of either cantilever, propped or anchored
retaining walls in which effects of construction methods (excavated or
backfilled) are considered. The chapter concludes with the application of the
analysis to a complex embedded retaining wall. The development and the use of
the finite element method in analysing a number of penetration problems
involving sampling tubes and piles are described in Chapter 5. Such analyses
can not only provide quantitative information on the changes in soil state
caused by the penetration but also enable one to extract characteristic soil
parameters from the simulation of actual field tests such as cone penetration
and pressure-meter tests.
deals with the complex interactions between fluid and solid skeletons for both
static and dynamic loading. The governing equations for the solid and fluid constituents
have been set out in a general manner and a nonlinear transient finite element
formulation for the problem developed. A centrifuge model test of a dike is
then simulated by the analysis, and the success of the developed analysis was
demonstrated by the ability of the analytical model to reproduce the physical
observations in the centrifuge model. Because the method of construction used
has often significant influence on the mechanical behavior of geotechnical
engineering structures, the next three chapters describe modifications to the
finite element formulation to take account of construction induced events.
Chapter 2 investigates the effects of compaction-induced stresses on the
behavior of retaining walls and buried flexible culverts. Chapter 3 describes
the use of an anisotropic soil model in the simulation of excavations. Such
unloading problems in saturated clay, which result in a transient safety factor
diminishing with time, can create dangers on many construction sites. Chapter 4
shows the finite element analysis of either cantilever, propped or anchored
retaining walls in which effects of construction methods (excavated or
backfilled) are considered. The chapter concludes with the application of the
analysis to a complex embedded retaining wall. The development and the use of
the finite element method in analysing a number of penetration problems
involving sampling tubes and piles are described in Chapter 5. Such analyses
can not only provide quantitative information on the changes in soil state
caused by the penetration but also enable one to extract characteristic soil
parameters from the simulation of actual field tests such as cone penetration
and pressure-meter tests.
A simplified
analysis of the dynamic pile driving problem by a combination of onedimensional
wave equations for the pile with an approximate plan-wave propagation model for
the soil has been considered in Chapter 6. Such analyses which include soil
inertia effects represent a considerable improvement on conventional analysis
of pile driving problems. In many situations the soil properties do not vary in
one or two spatial directions and it is then possible to use the finite layer
approach described in Chapter 7. By using an analytical representation of the
field in the horizontal direction, such semianalytical methods became very
efficient. The final two chapters describe both the development and use of
explicit finite difference methods for analysing a wide range of geotechnical
engineering problems involving both continuous as well as discontinuous jointed
media. Such distinct element methods may prove to have much wider applications
in the future. The editors hope that these demonstrations of advanced analysis
applied to geotechnical engineering problems might encourage engineers to
consider incorporating them in their strategies. Perhaps equally important,
such analyses might enable them to extrapolate more effectively experience
gained from one geotechnical site to another.
analysis of the dynamic pile driving problem by a combination of onedimensional
wave equations for the pile with an approximate plan-wave propagation model for
the soil has been considered in Chapter 6. Such analyses which include soil
inertia effects represent a considerable improvement on conventional analysis
of pile driving problems. In many situations the soil properties do not vary in
one or two spatial directions and it is then possible to use the finite layer
approach described in Chapter 7. By using an analytical representation of the
field in the horizontal direction, such semianalytical methods became very
efficient. The final two chapters describe both the development and use of
explicit finite difference methods for analysing a wide range of geotechnical
engineering problems involving both continuous as well as discontinuous jointed
media. Such distinct element methods may prove to have much wider applications
in the future. The editors hope that these demonstrations of advanced analysis
applied to geotechnical engineering problems might encourage engineers to
consider incorporating them in their strategies. Perhaps equally important,
such analyses might enable them to extrapolate more effectively experience
gained from one geotechnical site to another.
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CONTENTS
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1. Computational
Approaches to the Dynamics and Statics of Saturated and Unsaturated Soils
Approaches to the Dynamics and Statics of Saturated and Unsaturated Soils
2. Finite
Element Analysis of Compaction Problems
Element Analysis of Compaction Problems
3. Finite
Element Analysis of the Stability of a Vertical Cut Using an
Element Analysis of the Stability of a Vertical Cut Using an
4. Anisotropic
Soil Model
Soil Model
5. Finite
Deformation Analysis of Soil Penetration Problems
Deformation Analysis of Soil Penetration Problems
6. Analysis
of the Dynamics of Pile Driving
of the Dynamics of Pile Driving
7. Finite
Layer Methods in Geotechnical Analysis
Layer Methods in Geotechnical Analysis
8. The
Explicit Finite Difference Technique Applied to Geomechanics.Part I : Continua
Explicit Finite Difference Technique Applied to Geomechanics.Part I : Continua
9. The
Explicit Finite Difference Technique Applied to Geomechanics. Part II:
Discontinua—The Distinct Element Method
Explicit Finite Difference Technique Applied to Geomechanics. Part II:
Discontinua—The Distinct Element Method
* Above mentioned topics are main topics of this book
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and there are many sub-topics under those. Please refer the Preview
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