Earthquake ground motions are at the interface of two disciplines – seismologists predict them, and engineers use them. Oftentimes, engineers do not understand the limitations of ground motion prediction, and seismologists do not understand the effect of ground motions on structures. As a result, there is significant confusion regarding ground motions for design.
Site-Specific Ground Motions for Seismic Design of Buildings and Other Structures provides a step-by-step approach to properly conduct site-specific Ground Motion Hazard Analysis (GMHA) and Site Response Analysis (SRA). This book also explains various resources that are available to perform GMHA and SRA. It references several standards to provide a comprehensive approach to generate ground motions for design.
Topics include
- Background of design ground motions in the United States,
- General Procedure (GP) in ASCE 7 and its limitations,
- Ground Motion Hazard Analysis,
- Site Response Analysis,
- Ground motions for the evaluation and retrofit of buildings (ASCE 41),
- Ground motions for the design of LNG tanks (ACI 376 and API 620 & 625),
- Ground motions for the design of bridges (AASHTO and Caltrans), and
- Ground motions for the performance-based design of tall buildings (PEER TBI).
This book will appeal to geotechnical and structural engineers who need ground motion parameters for liquefaction analyses and seismic design of structures. It will also be highly useful to seismologists, geologists, educators, students, and building code officials.
Author(s): Praveen K. Malhotra
Publisher: American Society of Civil Engineers (ASCE) Press
Year: 2022
Language: English
Pages: 136
Contents
Preface
Acknowledgments
Abbreviations, Acronyms, and Notation
Chapter 1: Response Spectrum of Ground Motion
1.1 Introduction
1.2 Ground Motion Histories
1.3 Geometric-Mean, Maximum-Horizontal, and Rotated-Median Amplitudes
1.4 Single-Degree-of-Freedom System
1.5 Deformation Response Spectrum
1.6 Pseudo-Acceleration Response Spectrum
1.7 Pseudo-Velocity Response Spectrum
1.8 Tripartite Response Spectrum
1.9 Geometric-Mean, Maximum-Horizontal, and Rotated-Median Response Spectra
1.10 Smooth Response Spectrum from PGA, PGV, and PGD
1.11 Summary
References
Chapter 2: General Procedure
2.1 Introduction
2.2 Site Coordinates
2.3 Site Class
2.4 MCER and Design Response Spectra
2.5 Tripartite Plot of Design Response Spectrum
2.6 Displacement-Sensitive Region of Design Response Spectrum
2.7 Vertical Response Spectrum
2.8 Summary
References
Chapter 3: Ground Motion Hazard Analysis
3.1 Introduction
3.2 UHRS for VS30 = 2,500 ft/s
3.3 Magnitude and Distance of Controlling Earthquakes
3.4 Calculation of Epsilon ε
3.5 UHRS for Actual VS30
3.6 Conversion from Geometric-Mean to Maximum-Horizontal
3.7 Probabilistic MCER Response Spectrum
3.8 Deterministic MCER Response Spectrum
3.9 Site-Specific MCER Response Spectrum
3.10 Design Response Spectrum
3.11 Tripartite Plot of Design Response Spectrum
3.12 SDS and SD1 from GMHA
3.13 PGAM from GMHA
3.14 PGA, PGV, and PGD of Design Ground Motion
3.15 Vertical Response Spectrum
3.16 Near-Field (Near-Source) Factors
3.17 Steps of GMHA
3.18 Summary
References
Chapter 4: Site Response Analysis
4.1 Introduction
4.2 MCER Response Spectrum of Outcrop Motion
4.3 Histories of Outcrop Motion
4.4 Dynamic Analyses of Soil Profiles
4.5 MCER Response Spectrum of Free-Surface Motion
4.6 Design Parameters
4.7 Summary
References
Chapter 5: GMHA for a Site in California
5.1 Introduction
5.2 Site Coordinates and Site Class
5.3 General Procedure
5.4 UHRS for Reference VS30
5.5 Proof of Method
5.6 Max UHRS for Actual VS30
5.7 Risk Coefficients
5.8 Probabilistic MCER Response Spectrum
5.9 Deterministic MCER Response Spectrum
5.10 Site-Specific MCER Response Spectrum
5.11 Design Response Spectrum
5.12 Tripartite Plot of Design Response Spectrum
5.13 SDS and SD1 from GMHA
5.14 PGAM from GMHA
5.15 PGA, PGV, and PGD of Design Ground Motion
5.16 Vertical Response Spectrum
5.17 Summary
References
Chapter 6: Ground Motions for Seismic Evaluation and Retrofit of Buildings
6.1 Introduction
6.2 BSE-2N Ground Motions
6.3 BSE-1N Ground Motions
6.4 BSE-2E Ground Motions
6.5 BSE-1E Ground Motions
6.6 Summary
References
Chapter 7: Ground Motions for Design of Bridges, LNG Tanks, and Tall Buildings
7.1 AASHTO and Caltrans Ground Motions
7.2 OBE Ground Motions
7.3 SSE Ground Motions
7.4 Service-Level Ground Motions for Tall Buildings
7.5 Summary
References
Chapter 8: Damping Adjustment of Response Spectrum
8.1 Introduction
8.2 Procedure
8.3 Example
8.4 Summary
References
Chapter 9: Summary
References
Index
About the Author
