: Sergey Aleynikov
: Spatial Contact Problems in Geotechnics Boundary-Element Method
: Springer-Verlag
: 9783540447764
: 1
: CHF 190.30
:
: Wahrscheinlichkeitstheorie, Stochastik, Mathematische Statistik
: English
: 648
: Wasserzeichen/DRM
: PC/MAC/eReader/Tablet
: PDF

This book presents a systematic approach to numerical solution for a wide range of spatial contact problems of geotechnics. On the basis of the boundary element method new techniques and effective computing algorithms are considered. Special attention is given to the formulation and analysis of the spatial contact models for elastic bases. Besides the classical schemes of contact deformation, new contact models are discussed for spatially nonhomogeneous and nonlinearly elastic media properly describing soil properties.

Obituary5
Foreword7
Preface9
Contents14
1 Spatial Contact Models of Elastic Bases19
1.1 Fundamental Solutions of Static Problems of Spatial Theory of Elasticity19
1.1.1 Concentrated Forces in an Elastic Body19
1.1.2 Green's Displacement Tensor20
1.1.3 Kelvin's Tensor of Influence21
1.2 Elastic Homogeneous Isotropic Half-Space23
1.2.1 Mindlin's Solution23
1.2.2 Boussinesq and Cerruti Solutions24
1.3 Coupled Half-Spaces26
1.4 Elastic Layered Bases30
1.4.1 Constant-Width Elastic Layer30
1.4.2 Variable-Thickness Elastic Layer35
1.4.3 Multilayer Elastic Half-Space43
1.5 Elastic Bases with the Deformation Modulus, Variable with Depth73
1.5.1 Variation of Deformation Modulus with Depth73
1.5.2 Normal Concentrated Force Acting on the Half-Space Surface76
1.5.3 Settlement of a Nonhomogeneous Half-Space Surface81
References101
2 Static Analysis of Contact Problems for an Elastic Half-Space108
2.1 Boundary Integral Equations of the Contact Problem for an Absolutely Rigid Punch, Deepened into an Elastic Half-Space, Under a Spatial Load System108
2.2 Finite-Measure Analogue of the Contact Problem Using Direct Boundary-Element Method113
2.3 Numerical-and-Analytical Method of Integration of Fundamental Mindlin's Solutions118
2.4 Punch in the Shape of a Rotation Body, Deepened into an Elastic Half-Space125
2.4.1 Axisymmetric Contact Problem127
2.4.2 Torsion of an Axisymmetric Punch in an Elastic Half-Space132
2.5 Contact Problems for Rigid Punches Located on the Elastic Base Surface136
2.5.1 Indentation of a Punch with a Flat Smooth Base into an Elastic Half-Space138
2.5.2 Torsion of an Elastic Half-Space by a Rigid Punch143
References148
3 Computer Implementation of Boundary-Element Algorithms151
3.1 Software for Solving Spatial Problems of Contact of Foundations with Soil Bases152
3.2 Specific Features of Numerical Solutions of Linear Algebraic Equation Systems with Non-symmetrical Matrices, Arising in Boundary-Element Analysis162
3.3 Effective Discretization of 2-D Domains of Complex Shape at Numerical Solving of Spatial Contact Problems of Theory of Elasticity166
3.3.1 Algorithm of Triangulation in the Boundary-Element Method167
3.3.2 Dual Grids and Their Application in Boundary-Element Method178
3.4 Automated Construction of Spatial Grids of Boundary Elements on the Surfaces of Contact of Deepened Foundation Structures with Soil190
3.5 Test Examples of Numerical Modeling of Spatial Problems of Contact Interaction208
3.5.1 Contact Problems for Flat Punches with a Smooth Base208
3.5.2 Contact Problems with the Account of the Deepening Factor for Axisymmetric Punches, Interacting with an Elastic Half-Space234
References259
4 Contact Interaction of Shallow Foundations with Nonhomogeneous Bases266
4.1 Spatial Contact Problems for Rigid Flat-Bottom Punches268
4.2 Contact Problems for Rigid Rectangular Punches, Resting on Elastic Nonhomogeneous Bases293
4.2.1 Contact Interaction at Central Loading297
4.2.2 Contact Interaction at Off-Centre Loading with the Account of Unilateral Constraints310
4.3 Control of the Parameters of Loading and Shape to Provide a Uniform Settlement of Rigid Foundation Plates315
4.3.1 Formulation of the Problem and Its Numerical Implementation316
4.3.2 External Load Control318
4.3.3 Shape Parameter Control322
4.4 Spatial Stress-Strained State of the Base of a Rigid Strip Variable-Width Foundation326
4.4.1 Contact Problem for a Variable-Width Strip Foundation327
4.4.2 Stress-Strained State of a Strip Foundation Base330
4.4.3 Contact Pressure Distribution in the Area of the Strip Foundation Width Variation332
4.5 Calculation of the Section Kernel Boundary for Rigid Foundation Plates338
4.6 Numerical Algorithms of Solving Boundary Integral Equations in Spatial Contact Problems for a Nonlinearly Deformable Base349
4.6.1 Spatial Contact Model for a Nonlinearly Deformable Base350
4.6.2 System of Nonlinear Contact Equations of the Contact Problem for Absolutely Rigid Punches of a Complex Shape with a Flat Base352
4.6.3 Iterative Processes of Solving a Finite-Measure Analogue of the Spatial Contact Problem for a Nonlinearly Deformable Base354
4.6.4 Contact Problem for a Round Punch on a Nonlinearly Deformable Base356
4.6.5 Estimation of Nonlinear Deformation Effects from Punch Test Results363
4.7 Contact Problem for Orthotropic Foundation Plates with the Account of the Specific Features of Spatially Nonhomogeneous Base Deformation366
4.7.1 Static Calculations of Foundation Plates on Elastic Bases367
4.7.2 System of Integro-Differential Equations of Bending of a Plate, Resting on an Elastic Base373
4.7.3 Calculation of Rectangular Orthotropic Plates Based on Combining Finite-Difference and Boundary-Element Methods376
4.7.4 Examples of Numerical Modelling of the Contact Interaction of Plates with Elastic Bases379
References387
5 Calculation of Bases for Rigid Complex-Shaped Deepened Foundations According to the Second Limiting State in a Three-Dimensional Formulation400
5.1 General Information on the Calculation of Bases for Foundation Structures from the Deformations405
5.2 Spatial Problems for Calculation of Foundation Bases with the Account of the Depth Factor411
5.3 Calculation of Bases for Pyramidal Piles Under Vertical, Horizontal, and Momental Loads430
5.3.1 Existing Approaches to the Calculation of Piles with a Variable Cross-Section431
5.3.2 Calculation for the Vertical Load435
5.3.3 Calculation for the Action of a Horizontal Load435
5.3.4 Calculation for the Action of an Inclined Load437
5.3.5 Calculation for the Combined Action of an Inclined Force and a Moment438
5.4 Interaction of Bases and Rigid Bored Foundations with Vertical and Inclined Piles439
5.4.1 Structure, Design, and Specific Features of Calculation of Rigid Pile Foundations with Short Piles and a Pile Raft440
5.4.2 Vertical Cylindrical Piles Under an Inclined Load443
5.4.3 Foundations with Inclined Piles and a Rectangular Pile Raft450
5.5 Spatial Contact Problem for a Bored Pile Foundation with a Widening453
5.5.1 Production and Structures of Bored Pile Foundations with a Support Widening454
5.5.2 Engineering Methods for Calculation of Bored Pile Foundation Bases from the Base Deformation456
5.5.3 Calculation of Deformations of the Base of a Bored Pile Foundation with a Spheroconical Widening Under a Central Loading (Axisymmetric Contact Problem)458
5.5.4 Calculation of Displacements and Slopes of a Bored Pile Foundation Under an Inclined Load463
5.6 Calculation of Contact Interaction of Bases with Slotted Foundations of Industrial and Civil Buildings469
5.6.1 Slotted Foundations of Various Structural Shapes469
5.6.2 Calculation of Slotted Foundations Based on the Base Deformation472
5.6.3 Contac