Liquefaction, Flow, and Associated Ground Failure
Author | : T. Leslie Youd |
Publisher | : |
Total Pages | : 20 |
Release | : 1973 |
Genre | : Earth movements |
ISBN | : |
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Author | : T. Leslie Youd |
Publisher | : |
Total Pages | : 20 |
Release | : 1973 |
Genre | : Earth movements |
ISBN | : |
Author | : T. Leslie Youd |
Publisher | : |
Total Pages | : 5 |
Release | : 1973 |
Genre | : |
ISBN | : |
Author | : National Academies of Sciences, Engineering, and Medicine |
Publisher | : |
Total Pages | : 350 |
Release | : 2019-01-30 |
Genre | : |
ISBN | : 9780309440271 |
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. State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences 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 report represents a first attempt within the geotechnical earthquake engineering community to consider, in such a manner, the various methods to assess liquefaction consequences.
Author | : Paul A. Gilbert |
Publisher | : |
Total Pages | : 36 |
Release | : 1976 |
Genre | : Mass-wasting |
ISBN | : |
Author | : Catherine Marie Famiglietti |
Publisher | : |
Total Pages | : 686 |
Release | : 1993 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2005 |
Genre | : |
ISBN | : |
Liquefaction-induced ground failure continues to be a major component of earthquake-related damages in many parts of the world. Experience from past earthquakes indicates lateral spreads and flow slides have been widespread in saturated granular soils in coastal and river areas. Movements may exceed several meters even in very gentle slopes. More interestingly, failures have occurred not only during, but also after earthquake shaking. The mechanism involved in large lateral displacements is still poorly understood. Sand deposits often comprise of low permeability sub-layers e.g., silt seams. Such layers form a hydraulic barrier to upward flow of water associated with earthquake-induced pore pressures. This impedance of flow path results in an increase of soil skeleton volume (or void ratio) beneath the barrier. The void redistribution mechanism as the focus of this study explains why residual strengths from failed case histories are generally much lower than that of laboratory data based on undrained condition. A numerical stress-flow coupled procedure based on an effective stress approach has been utilized to investigate void redistribution effects on the seismic behavior of gentle sandy slopes. This study showed that an expansion zone develops at the base of barrier layers in stratified deposits subjected to cyclic loading that can greatly reduce shear strength and results in large deformations. This mechanism can lead to a steady state condition within a thin zone beneath the barrier causing flow slide when a threshold expansion occurs in that zone. It was found that contraction and expansion, respectively at lower parts and upper parts of a liquefiable slope with a barrier layer is a characteristic feature of seismic behavior of such deposits. A key factor is the pattern of deformations localized at the barrier base, and magnitude that takes place with some delay. In this thesis, a framework for understanding the mechanism of large deformations, and a practical.
Author | : |
Publisher | : |
Total Pages | : 20 |
Release | : 1973 |
Genre | : Geology |
ISBN | : |
Author | : I. M. Idriss |
Publisher | : |
Total Pages | : 237 |
Release | : 2008 |
Genre | : Earthquakes |
ISBN | : 9781932884364 |
Author | : Steven F. Bartlett |
Publisher | : |
Total Pages | : 168 |
Release | : 1990 |
Genre | : Earth movements |
ISBN | : |
Author | : PoulV. Lade |
Publisher | : Routledge |
Total Pages | : 484 |
Release | : 2018-04-27 |
Genre | : Technology & Engineering |
ISBN | : 1351424459 |
The workshop aims to provide a fundamental understanding of the liquefaction process, necessary to the enhancement of liquefaction prediction. The contributions are divided into eight sections, which include: factors affecting liquefaction susceptibility and field studies of liquefaction.