Undrained Seismic Response of Underground Structures

Undrained Seismic Response of Underground Structures

Detalles Bibliográficos
Otros Autores: Sandoval, Eimar Andrés, autor (autor), Bobet, Antonio, autor
Formato: Libro electrónico
Idioma:Inglés
Publicado: Colombia : Programa Editorial Universidad del Valle 2020.
Edición:First edition
Colección:Colección Ingeniería - Investigación.
Materias:
Earthquake engineering.
Ingeniería sísmica.
Libros electronicos.
Ver en Biblioteca Universitat Ramon Llull:https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009636105206719
Tabla de Contenidos:
  • Intro
  • Cubierta
  • Portadilla
  • Créditos
  • Portada
  • Preface
  • Contents
  • 1 Introduction
  • 1.1 Problem statement and motivation
  • 1.2 Research objective and scope of the work
  • 1.3 Outline
  • 2 Background
  • 2.1 Introduction
  • 2.2 Effect of earthquakes on underground structures
  • 2.2.1 Effect of ground shaking on underground structures
  • 2.3 Reported damage to underground structures during seismic events
  • 2.3.1 A history case: The Daikai Station collapse
  • 2.4 Drained seismic response
  • 2.4.1 Free field approach
  • 2.4.2 Soil-structure interaction approach
  • 2.5 Undrained seismic response
  • 2.5.1 Bobet (2003, 2010)
  • 2.5.2 Okhovat and Maekawa (2009)
  • 2.6 Constitutive models
  • 2.6.1 Commonly used models
  • 2.6.2 Complex models
  • 2.7 Pore pressure models
  • 2.7.1 Martin, Finn and Seed (1975)
  • 2.7.2 Dobry, Pierce, Dyvik, Thomas and Ladd (1985)
  • 2.7.3 Ivšić (2006)
  • 2.8 Pore pressure generation in coarse-grained deposits
  • 2.8.1 Numerical analyses
  • 2.8.2 Cyclic large-size laboratory tests
  • 2.9 Summary and discussion
  • 3 Constitutive Model
  • 3.1 Introduction
  • 3.2 The cyclic nonlinear elastoplastic model
  • 3.2.1 Hyperbolic behavior
  • 3.2.2 Cyclic loading
  • 3.2.3 Update of the small-strain shear modulus (Go)
  • 3.2.4 Coupled shear-volumetric strains with excess pore pressures accumulation
  • 3.2.5 Yield criterion and plastic strain
  • 3.3 Implementation of the elastoplastic model in FLAC
  • 3.3.1 Explicit, time-marching scheme
  • 3.3.2 Lagrangian analysis
  • 3.3.3 Mixed discretization scheme
  • 3.3.4 Model implementation
  • 3.4 Summary and discussion
  • 4 Constitutive Model Verification
  • 4.1 Introduction
  • 4.2 Stage 1: stiffness degradation, comparison with 1-D codes and monotonic test
  • 4.2.1 Stiffness degradation under drained cyclic simple shear
  • 4.2.2 Comparison with 1D codes.
  • 4.2.3 Verification of a drained monotonic test
  • 4.3 Stage 2: Cyclic laboratory tests
  • 4.3.1 Drained laboratory tests
  • 4.3.2 Undrained laboratory tests
  • 4.4 Simulation of laboratory tests using more elements
  • 4.5 Stage 3: Large scale - centrifuge tests
  • 4.5.1 Centrifuge test on saturated sand with excess pore pressures generation
  • 4.5.2 Centrifuge modelling of a tunnel in dry sand
  • 4.6 Summary and comments
  • 5 Effect of Input Frequency on Tunnel Distortions
  • 5.1 Introduction
  • 5.2 Linear-elastic ground
  • 5.3 Nonlinear elastoplastic ground under drained loading
  • 5.4 Nonlinear elastoplastic ground under undrained loading without excess pore pressures accumulation
  • 5.5 Nonlinear elastoplastic ground under undrained loading considering excess pore pressures accumulation
  • 5.6 Summary and discussion
  • 6 Seismic Response of Underground Structures
  • 6.1 Introduction
  • 6.2 Linear-elastic analysis
  • 6.2.1 Effect of relative stiffness on tunnel distortions
  • 6.3 Nonlinear elastoplastic analysis for drained loading
  • 6.3.1 Effect of relative stiffness on tunnel distortions
  • 6.4 Nonlinear elastoplastic analysis for undrained loading without excess pore pressures accumulation
  • 6.4.1 Excess pore pressures in the ground
  • 6.4.2 Shear stresses in the ground
  • 6.4.3 Effect of relative stiffness on tunnel distortions
  • 6.4.4 Effect of relative stiffness on liner loading
  • 6.5 Nonlinear elastoplastic analysis for undrained loading considering excess pore pressures accumulation
  • 6.5.1 Excess pore pressures in the ground
  • 6.5.2 Contours of shear stresses in the ground
  • 6.5.3 Contours of normalized shear modulus
  • 6.5.4 Effect of relative stiffness on tunnel distortions
  • 6.5.5 Effect of relative stiffness on liner loading
  • 6.6 Seismic response using pseudo-static numerical analyses
  • 6.7 Summary and discussion.
  • 7 Summary, Conclusions and Proposed Future Work
  • 7.1 Introduction
  • 7.2 Summary of the work
  • 7.2.1 Development of the constitutive model
  • 7.2.2 Verification of the constitutive model
  • 7.2.3 Effect of input frequency on tunnel distortions
  • 7.2.4 Parametric study to evaluate the seismic response of tunnels
  • 7.3 Conclusions
  • 7.3.1 Performance criteria
  • 7.4 Recommendations for future work
  • References
  • Index.

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