Seismic Safety Evaluation of Concrete Dams

Seismic Safety Evaluation of Concrete Dams

A Nonlinear Behavioral Approach

1st Edition - August 23, 2013

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  • Author: Chong Zhang
  • Hardcover ISBN: 9780124080836
  • eBook ISBN: 9780124079199

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Description

The consequences of a large dam failing can be disastrous. However, predicting the performance of concrete dams during earthquakes is one of the most complex and challenging problems in structural dynamics. Based on a nonlinear approach, Seismic Safety Evaluation of Concrete Dams allows engineers to build models that account for nonlinear phenomena such as vertical joint slippage, cracks, and cavitation. This yields more accurate estimates. Advanced but readable, this book is the culmination of the work carried out by Tsinghua University Research Group on Earthquake Resistance on Dams over the last two decades.

Key Features

  • Nonlinearity characteristics of high concrete dams, seismic analysis methods, evaluation models
  • A systematic approach to nonlinear analysis and seismic safety evaluation of concrete dams
  • Includes nonlinear fracture of dam-water-foundation interaction system, dynamic fluid-structure
  • Covers soil-structure interactions, and meso-scale mechanical behavior of concrete are all international front issues of the field

Readership

Researchers in the fields: hydropower and dam structures, especially on earthquake resistance of high dam structures, hydraulic engineering, geotechnical engineering, earthquake engineering, and energy engineering

Table of Contents

  • Foreword

    Preface

    About the Editors

    Contributors

    Part I: General Introduction

    Chapter 1. Challenges of High Dam Construction to Computational Mechanics

    1.1 Background

    1.2 Building more Bridges between Computational Mechanics and Large Dam Engineering

    1.3 Research Examples Completed by the National Laboratory of High Dams and Large Structures at Tsinghua

    1.4 Conclusions

    References

    Chapter 2. The Performance of Dams During the Wenchuan 5–12 Earthquake and Lessons Learned from the Event

    Acknowledgments

    2.1 Introduction

    2.2 Performance of Hydroprojects and High Dams

    2.3 Lessons Learned on Hydraulic Structures in Relation to the Wenchuan 5–12 Event

    2.4 Conclusions

    References

    Chapter 3. Seismic Safety Evaluation of High Concrete Dams: Part 1: State-of-the-Art Design and Research

    3.1 Introduction

    3.2 Conventional Seismic Design Practice

    3.3 Advanced Seismic Design and Research

    3.4 Conclusions

    References

    Chapter 4. Seismic Safety Evaluation of High Concrete Dams: Part 2: Earthquake Behavior of Arch Dams – Case Study

    Acknowledgments

    4.1 Introduction

    4.2 Computational Results

    4.3 Conclusions

    References

    Chapter 5. A Primary Digital Dam Simulation System for an Arch Dam

    Acknowledgments

    5.1 Introduction

    5.2 Digital Dam Simulation System

    5.3 Simulation Model of an Arch Dam

    5.4 Inverse Analysis

    5.5 Structural Analysis

    5.6 Conclusions

    References

    Part II: Dynamic Soil–Structure and Fluid–Structure Interactions

    Chapter 6. A Coupling Procedure of Finite Element and Scaled Boundary Finite Element Methods for Soil–Structure Interaction in the Time Domain

    Acknowledgments

    6.1 Introduction

    6.2 Motion Equations of Coupling System

    6.3 Realization and Model Approximation

    6.4 Evaluation of Interaction Forces

    6.5 Numerical Verification

    6.6 Conclusions

    References

    Chapter 7. Time-Domain Analysis of Gravity Dam–Reservoir Interaction Using High-Order Doubly Asymptotic Open Boundary

    7.1 Introduction

    7.2 Finite Element Model of Dam–Reservoir System

    7.3 Scaled Boundary Finite Element Method for Semi-infinite Reservoir with Constant Depth

    7.4 Modal Decomposition of Scaled Boundary Finite Element Equation

    7.5 Doubly Asymptotic Continued Fraction Solution for Modal Dynamic Stiffness

    7.6 High-Order Doubly Asymptotic Open Boundary

    7.7 Numerical Implementation in Time Domain

    7.8 Numerical Examples

    7.9 Conclusions

    References

    Chapter 8. Finite Element Analysis of Dam–Reservoir Interaction Using High-Order Doubly Asymptotic Open Boundary

    Acknowledgments

    8.1 Introduction

    8.2 Modeling of Dam–Reservoir System

    8.3 Summary of the Scaled Boundary Finite Element Method for Semi-infinite Reservoir with Constant Depth

    8.4 High-Order Doubly Asymptotic Open Boundary for Hydrodynamic Pressure

    8.5 Coupled Numerical Methods for Dam–Reservoir Interaction Analysis

    8.6 Numerical Examples

    8.7 Conclusions

    References

    Chapter 9. Analytical Solutions for Dynamic Pressures of Coupling Fluid–Porous Medium–Solid due to SV-Wave Incidence

    Acknowledgment

    9.1 Introduction

    9.2 Governing Equations

    9.3 Boundary Conditions

    9.4 Formulations of the System

    9.5 Numerical Example

    9.6 Discussion of Factors Influencing Dynamic Pressures

    9.7 Conclusions

    Appendix

    References

    Chapter 10. Modification of Equation of Motion of Fluid-Conveying Pipe for Laminar and Turbulent Flow Profiles

    Acknowledgments

    10.1 Introduction

    10.2 Modification of the Centrifugal Force Term of the Equation of Motion of the Fluid-Conveying Pipe

    10.3 Flow-Profile-Modification Factors with Different Flow Profiles

    10.4 Equivalent Flow Velocity and Equivalent Mass

    10.5 Critical Flow Velocities for Pipes Conveying Fluid for Different Flow Profiles

    10.6 Conclusions

    References

    Part III: Nonlinear Earthquake Response of Concrete Dams

    Chapter 11. Influence of Seismic Input Mechanisms and Radiation Damping on Arch Dam Response

    Acknowledgments

    11.1 Introduction

    11.2 Earthquake Input Mechanisms and Verification

    11.3 Modeling of Contraction Joints

    11.4 Comparison Study on Canyon and Dam Response by Different Input Models

    11.5 Conclusions

    References

    Chapter 12. Seismic Damage-Cracking Analysis of Arch Dams Using Different Earthquake Input Mechanisms

    Acknowledgments

    12.1 Introduction

    12.2 Modeling of the System

    12.3 Seismic Damage-Cracking Analysis of Dagangshan Arch Dam

    12.4 Conclusions

    References

    Chapter 13. A Comparative Study of the Different Procedures for Seismic Cracking Analysis of Concrete Dams

    Acknowledgments

    13.1 Introduction

    13.2 Fracture Procedures

    13.3 Benchmark Example for Accuracy Verification

    13.4 Earthquake Fracture Analysis of Koyna Dam

    13.5 Earthquake Cracking Analysis of an Arch Dam

    13.6 Conclusions

    References

    Chapter 14. Nonlinear Earthquake Analysis of High Arch Dam–Water–Foundation Rock Systems

    Acknowledgments

    14.1 Introduction

    14.2 Computational Model

    14.3 Ertan Arch Dam

    14.4 Efficiency Evaluation of the Earthquake Input Method

    14.5 Evaluation of the Proposed Model Using EACD-3D-2008

    14.6 Earthquake Analysis of Arch Dam–Water–Foundation Rock

    14.7 Conclusions

    References

    Chapter 15. Numerical Simulation of Reinforcement Strengthening for High–Arch Dams to Resist Strong Earthquakes

    Acknowledgments

    15.1 Introduction

    15.2 Material Constitutive Models

    15.3 Finite Element Formulation

    15.4 Numerical Verification

    15.5 Damage Analysis of the Dagangshan Arch Dam

    15.6 Conclusions

    References

    Chapter 16. Nonlinear Seismic Analyses of a High Gravity Dam with and without the Presence of Reinforcement

    Acknowledgments

    16.1 Introduction

    16.2 Constitutive Relations of Material Components

    16.3 Seismic Analyses of a Gravity Dam

    16.4 Conclusions

    References

    Chapter 17. Seismic Safety of Arch Dams with Aging Effects

    Acknowledgments

    17.1 Introduction

    17.2 Modeling of Chemomechanical Damage of Aging Dams

    17.3 Nonlinear Finite Element Procedure for Seismic Analysis of Arch Dams

    17.4 Seismic Response Analysis of Arch Dams with Aging Effects

    17.5 Conclusions

    References

    Part IV: Topics Related to the Safety Evaluation of Concrete Dams

    Chapter 18. Three-Dimensional Mode Discrete Element Method: Elastic Model

    Acknowledgment

    18.1 Introduction

    18.2 3MDEM

    18.3 Examples for the Linear Elastic Constitutive Model

    18.4 Conclusions

    References

    Chapter 19. Comparative Study Procedure for the Safety Evaluation of High Arch Dams

    Acknowledgments

    19.1 Introduction

    19.2 Safety Evaluation Method

    19.3 Material Models and Parameters

    19.4 Engineering Verification for the Safety Evaluation Method

    19.5 Evaluation Criteria

    19.6 Conclusions

    References

    Chapter 20. Investigation of Damping in Arch Dam–Water–Foundation Rock System of Mauvoisin Arch Dam

    Acknowledgments

    20.1 Introduction

    20.2 Analysis Procedure

    20.3 Effective Damping Ratio of Dam–Water–Foundation Rock System

    20.4 Seismic Responses of Mauvoisin Arch Dam for Two Foundation Models

    20.5 Conclusions

    References

    Chapter 21. Practical Procedure for Predicting Non-Uniform Temperature on the Exposed Face of Arch Dams

    Acknowledgments

    21.1 Introduction

    21.2 Heat Conduction Equation and Boundary Conditions for Arch Dams

    21.3 Solar Radiation Model

    21.4 Case Study

    21.5 Conclusions

    References

    Chapter 22. Experimental and Numerical Study of the Geometrical and Hydraulic Characteristics of a Single Rock Fracture during Shear

    22.1 Introduction

    22.2 Introduction to Coupled Shear–Flow Test

    22.3 Numerical Simulations

    22.4 Results of Numerical Simulation

    22.5 Conclusions

    References

    Part V: Mesoscale Mechanical Behavior of Concrete

    Chapter 23. Study on the Heterogeneity of Concrete and its Failure Behavior Using the Equivalent Probabilistic Model

    Acknowledgments

    23.1 Introduction

    23.2 Concrete Equivalent Probabilistic Model Based on Weibull Distribution Law

    23.3 Improved Model of Weibull Distribution Law

    23.4 Effect of Heterogeneity on Size Effect of Concrete: Test and Numerical Study

    23.5 Effect of Heterogeneity on Damage and Fracture Behavior of Koyna Gravity Dam

    23.6 Conclusions

    References

    Chapter 24. A Multiphase Mesostructure Mechanics Approach to the Study of the Fracture-Damage Behavior of Concrete

    Acknowledgments

    24.1 Introduction

    24.2 Preprocess of Mesoscale Numerical Simulation

    24.3 Mesoscopic Mechanical Model

    24.4 Statistical Distribution of Heterogeneity for Concrete Parameters

    24.5 Study on Mechanical Behaviors of Rockfill Concrete

    24.6 Conclusions

    References

    Chapter 25. Numerical Study of Dynamic Behavior of Concrete by Mesoscale Particle Element Modeling

    Acknowledgments

    25.1 Introduction

    25.2 Brief Introduction to the Preprocessing of the Mesoscale Concrete Model

    25.3 Inverse Method for Mesoparameters

    25.4 Numerical Simulations of Dynamic Splitting Tensile Tests at Different Strain Rates

    25.5 Numerical Simulations of Dynamic Uniaxial Compression Tests at Different Strain Rates

    25.6 Conclusions

    References

    Index

Product details

  • No. of pages: 712
  • Language: English
  • Copyright: © Butterworth-Heinemann 2013
  • Published: August 23, 2013
  • Imprint: Butterworth-Heinemann
  • Hardcover ISBN: 9780124080836
  • eBook ISBN: 9780124079199

About the Author

Chong Zhang

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