Anil K. Chopra

Earthquake Engineering for Concrete Dams (eBook, PDF)

Analysis, Design, and Evaluation

• Format: PDF

Produktbeschreibung

A comprehensive guide to modern-day methods for earthquake engineering of concrete dams Earthquake analysis and design of concrete dams has progressed from static force methods based on seismic coefficients to modern procedures that are based on the dynamics of dam-water-foundation systems. Earthquake Engineering for Concrete Dams offers a comprehensive, integrated view of this progress over the last fifty years. The book offers an understanding of the limitations of the various methods of dynamic analysis used in practice and develops modern methods that overcome these limitations. This important book: * Develops procedures for dynamic analysis of two-dimensional and three-dimensional models of concrete dams * Identifies system parameters that influence their response * Demonstrates the effects of dam-water-foundation interaction on earthquake response * Identifies factors that must be included in earthquake analysis of concrete dams * Examines design earthquakes as defined by various regulatory bodies and organizations * Presents modern methods for establishing design spectra and selecting ground motions * Illustrates application of dynamic analysis procedures to the design of new dams and safety evaluation of existing dams. Written for graduate students, researchers, and professional engineers, Earthquake Engineering for Concrete Dams offers a comprehensive view of the current procedures and methods for seismic analysis, design, and safety evaluation of concrete dams.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 320
• Erscheinungstermin: 23. Januar 2020
• Englisch
• ISBN-13: 9781119056041
• Artikelnr.: 58582593

Autorenporträt

ANIL K. CHOPRA is the Horace, Dorothy, and Katherine Johnson Professor Emeritus of Structural Engineering in the Department of Civil and Environmental Engineering, University of California at Berkeley. He served on the Berkeley faculty from 1969 to 2016.

Inhaltsangabe

Preface xiii

Acknowledgments xv

1 Introduction 1

1.1 Earthquake Experience: Cases with Strongest Shaking 1

1.2 Complexity of the Problem 6

1.3 Traditional Design Procedures: Gravity Dams 8

1.3.1 Traditional Analysis and Design 8

1.3.2 Earthquake Performance of Koyna Dam 9

1.3.3 Limitations of Traditional Procedures 9

1.4 Traditional Design Procedures: Arch Dams 11

1.4.1 Traditional Analysis and Design 11

1.4.2 Limitations of Traditional Procedures 12

1.5 Unrealistic Estimation of Seismic Demand and Structural Capacity 13

1.6 Reasons Why Standard Finite-Element Method is Inadequate 13

1.7 Rigorous Methods 14

1.8 Scope and Organization 16

Part I: Gravity Dams

2 Fundamental Mode Response of Dams Including Dam-Water Interaction 21

2.1 System and Ground Motion 21

2.2 Dam Response Analysis 22

2.2.1 Frequency Response Function 22

2.2.2 Earthquake Response: Horizontal Ground Motion 23

2.3 Hydrodynamic Pressures 24

2.3.1 Governing Equation and Boundary Conditions 24

2.3.2 Solutions to Boundary Value Problems 26

2.3.3 Hydrodynamic Forces on Rigid Dams 28

2.3.4 Westergaard's Results and Added Mass Analogy 30

2.4 Dam Response Analysis Including Dam-Water Interaction 32

2.5 Dam Response 33

2.5.1 System Parameters 33

2.5.2 System and Cases Analyzed 34

2.5.3 Dam-Water Interaction Effects 34

2.5.4 Implications of Ignoring Water Compressibility 37

2.5.5 Comparison of Responses to Horizontal and Vertical Ground Motions 39

2.6 Equivalent SDF System: Horizontal Ground Motion 40

2.6.1 Modified Natural Frequency and Damping Ratio 40

2.6.2 Evaluation of Equivalent SDF System 42

2.6.3 Hydrodynamic Effects on Natural Frequency and Damping Ratio 43

2.6.4 Peak Response 45

Appendix 2: Wave-Absorptive Reservoir Bottom 46

3 Fundamental Mode Response of Dams Including Dam-Water-Foundation Interaction 49

3.1 System and Ground Motion 50

3.2 Dam Response Analysis Including Dam-Foundation Interaction 51

3.2.1 Governing Equations: Dam Substructure 51

3.2.2 Governing Equations: Foundation Substructure 52

3.2.3 Governing Equations: Dam-Foundation System 53

3.2.4 Dam Response Analysis 54

3.3 Dam-Foundation Interaction 54

3.3.1 Interaction Effects 54

3.3.2 Implications of Ignoring Foundation Mass 55

3.4 Equivalent SDF System: Dam-Foundation System 56

3.4.1 Modified Natural Frequency and Damping Ratio 56

3.4.2 Evaluation of Equivalent SDF System 57

3.4.3 Peak Response 59

3.5 Equivalent SDF System: Dam-Water-Foundation System 60

3.5.1 Modified Natural Frequency and Damping Ratio 60

3.5.2 Evaluation of Equivalent SDF System 61

3.5.3 Peak Response 62

Appendix 3: Equivalent SDF System 63

4 Response Spectrum Analysis of Dams Including Dam-Water-Foundation Interaction 65

4.1 Equivalent Static Lateral Forces: Fundamental Mode 66

4.1.1 One-Dimensional Representation 66

4.1.2 Approximation of Hydrodynamic Pressure 67

4.2 Equivalent Static Lateral Forces: Higher Modes 68

4.3 Response Analysis 70

4.3.1 Dynamic Response 70

4.3.2 Total Response 70

4.4 Standard Properties for Fundamental Mode Response 71

4.4.1 Vibration Period and Mode Shape 71

4.4.2 Modification of Period and Damping: Dam-Water Inter