03-12-2017, 02:15 PM
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State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences
Author(s)/Editor(s): National Academies of Sciences, Engineering, and Medicine; Division on Earth and Life Studies; Board on Earth Sciences and Resources | Size: 27 MB | Format: PDF | Quality: Original preprint | Publisher: NAS Press | Year: 2016 | pages: 297 | ISBN: 0309440270, 9780309440271
Author(s)/Editor(s): National Academies of Sciences, Engineering, and Medicine; Division on Earth and Life Studies; Board on Earth Sciences and Resources | Size: 27 MB | Format: PDF | Quality: Original preprint | Publisher: NAS Press | Year: 2016 | pages: 297 | ISBN: 0309440270, 9780309440271
This book evaluates these various methods, focusing on those developed within the past 20 years, and recommends strategies to minimize uncertainties in the short term and to develop improved methods to assess liquefaction and its consequences in the long term. This volume represents a first attempt within the geotechnical earthquake engineering community to consider, in such a manner, the various methods to assess liquefaction consequences.
Earthquake-induced soil liquefaction (liquefaction) is a leading cause of earthquake damage worldwide. Liquefaction is often described in the literature as the phenomena of seismic generation of excess porewater pressures and consequent softening of granular soils. Many regions in the United States have been witness to liquefaction and its consequences, not just those in the west that people associate with earthquake hazards.
Past damage and destruction caused by liquefaction underline the importance of accurate assessments of where liquefaction is likely and of what the consequences of liquefaction may be. Such assessments are needed to protect life and safety and to mitigate economic, environmental, and societal impacts of liquefaction in a cost-effective manner. Assessment methods exist, but methods to assess the potential for liquefaction triggering are more mature than are those to predict liquefaction consequences, and the earthquake engineering community wrestles with the differences among the various assessment methods for both liquefaction triggering and consequences.
Contents
Summary
1 Introduction
2 A Primer on Earthquake-Induced Soil Liquefaction
3 Case Histories
4 The Simplified Stress-Based Approach to Triggering Assessment
5 Alternative Approaches to Liquefaction Triggering Assessment
6 Residual Shear Strength of Liquefied Soil
7 Empirical and Semi-Empirical Methods for Evaluating Liquefaction Consequences
8 Use of Computational Mechanics to Predict Liquefaction and Its Consequences
9 Performance-Based Evaluation and Design
10 Recommendations
References
Appendix
Histograms (or parameter distributions) of Recent Liquefaction Triggering Databases
General Description of Performance-Based Design
Glossary
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