Location
San Diego, California
Presentation Date
26 May 2010, 4:45 pm - 6:45 pm
Abstract
The effect of initial static shear stress on cyclic behavior of sands has been the concern of many researchers for more than five decades. This study includes the results of a set of cyclic simple shear tests carried out on a uniform sand with relative densities of 20%, 40%, and 60%, under three different initial normal stresses of 50, 150, and 250 kPa. All tests were performed under constant volume condition. Results show that the behavior of sands due to initial static shear stress, is controlled by two contradictive elements: first one relates to the increasing dynamic shear modulus due to the initial static shear stress that ends in greater liquefaction resistance, and the second relates to the amount of irreversible shear strains which increases with greater value of driving shear stress and consequently reduces the liquefaction resistance. These elements form alternations in the value of Kα; being increased in some zones and decreased in others. New trends observed in the variation of liquefaction resistance due to the initial static shear stress, leaded the authors to define new parameters which can interpret the failure conditions and complexities of the behavior.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Haeri, S. Mohsen and Pouragha, Mehdi, "An Insight to the Effect of Initial Static Shear Stress on the Liquefaction of Sands" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 6.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session01b/6
Included in
An Insight to the Effect of Initial Static Shear Stress on the Liquefaction of Sands
San Diego, California
The effect of initial static shear stress on cyclic behavior of sands has been the concern of many researchers for more than five decades. This study includes the results of a set of cyclic simple shear tests carried out on a uniform sand with relative densities of 20%, 40%, and 60%, under three different initial normal stresses of 50, 150, and 250 kPa. All tests were performed under constant volume condition. Results show that the behavior of sands due to initial static shear stress, is controlled by two contradictive elements: first one relates to the increasing dynamic shear modulus due to the initial static shear stress that ends in greater liquefaction resistance, and the second relates to the amount of irreversible shear strains which increases with greater value of driving shear stress and consequently reduces the liquefaction resistance. These elements form alternations in the value of Kα; being increased in some zones and decreased in others. New trends observed in the variation of liquefaction resistance due to the initial static shear stress, leaded the authors to define new parameters which can interpret the failure conditions and complexities of the behavior.
