Location
Chicago, Illinois
Date
04 May 2013, 10:30 am - 11:30 am
Abstract
A data set of undrained cyclic triaxial test with parametrically changing relative density and fines content is reviewed and interpreted in the scope of energy. It is found that the strain amplitude or pore-pressure buildup during cyclic loading is uniquely related to the energy dissipated in soil specimens. This further indicates that a RL (cyclic stress ratio)-Nc (number of cycles) line corresponding to specific soil strain represents a line of equal dissipated energy. An energy-based method (EBM) is proposed in which liquefaction potential can be evaluated by comparing the dissipated energy with upward seismic wave energy with no regard to stress intensity and the number of cycles. EBM developed here is applied to a hypothetical sand deposit shaken by a recorded seismic motion of the earthquake magnitude M=9.0 to compare with a conventional stress-based method (SBM) using the same seismic motion. The two results have similarities and differences, and the similarity tends to be greater, if the effect of M=9.0 is considered in SBM.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 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
Kokusho, Takaji, "Liquefaction Potential Evaluation: Energy-Based Method Compared to Stress-Based Method" (2013). International Conference on Case Histories in Geotechnical Engineering. 1.
https://scholarsmine.mst.edu/icchge/7icchge/session04/1
Liquefaction Potential Evaluation: Energy-Based Method Compared to Stress-Based Method
Chicago, Illinois
A data set of undrained cyclic triaxial test with parametrically changing relative density and fines content is reviewed and interpreted in the scope of energy. It is found that the strain amplitude or pore-pressure buildup during cyclic loading is uniquely related to the energy dissipated in soil specimens. This further indicates that a RL (cyclic stress ratio)-Nc (number of cycles) line corresponding to specific soil strain represents a line of equal dissipated energy. An energy-based method (EBM) is proposed in which liquefaction potential can be evaluated by comparing the dissipated energy with upward seismic wave energy with no regard to stress intensity and the number of cycles. EBM developed here is applied to a hypothetical sand deposit shaken by a recorded seismic motion of the earthquake magnitude M=9.0 to compare with a conventional stress-based method (SBM) using the same seismic motion. The two results have similarities and differences, and the similarity tends to be greater, if the effect of M=9.0 is considered in SBM.
