Location
San Diego, California
Presentation Date
30 Mar 2001, 1:30 pm - 3:30 pm
Abstract
Numerical simulation of fault rupture propagation through dry soil was performed using the finite difference code FLAC. A Mohr-Coulomb elasto-plastic constitutive model with strain softening was used to simulate soil behavior. The bedrock motion, prescribed at the bottom boundary of the mesh, was based on relevant seismological theories and observations. A total of 42 parametric analyses were performed where the shear strain rate and the plastic shear strain contours were used for localizing the rupture propagation as a shear band. Parametric analyses show that results are sensitive to the assumed soil type and dilatancy angle, but not to the soil layer thickness. Furthermore, it is concluded that: 1) the declination of the fault trace from the straight projection of the fault plane is higher in dilatant soils, 2) a graben is formed in cases of normal faults with relatively shallow dip-slip angle, 3) high values of the dilatancy angle tend to decrease the width of distorted zone on the ground surface and 4) local amplification of ground motion is possible near the fault trace in dense soils, especially in reverse faulting cases.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2001 University of Missouri--Rolla, 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
Loukidis, Dimitrios N. and Bouckovalas, George, "Numerical Simulation of Active Fault Rupture Propagation Through Dry Soil" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 4.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session03/4
Included in
Numerical Simulation of Active Fault Rupture Propagation Through Dry Soil
San Diego, California
Numerical simulation of fault rupture propagation through dry soil was performed using the finite difference code FLAC. A Mohr-Coulomb elasto-plastic constitutive model with strain softening was used to simulate soil behavior. The bedrock motion, prescribed at the bottom boundary of the mesh, was based on relevant seismological theories and observations. A total of 42 parametric analyses were performed where the shear strain rate and the plastic shear strain contours were used for localizing the rupture propagation as a shear band. Parametric analyses show that results are sensitive to the assumed soil type and dilatancy angle, but not to the soil layer thickness. Furthermore, it is concluded that: 1) the declination of the fault trace from the straight projection of the fault plane is higher in dilatant soils, 2) a graben is formed in cases of normal faults with relatively shallow dip-slip angle, 3) high values of the dilatancy angle tend to decrease the width of distorted zone on the ground surface and 4) local amplification of ground motion is possible near the fault trace in dense soils, especially in reverse faulting cases.
