Location
St. Louis, Missouri
Presentation Date
04 Apr 1995, 2:30 pm - 3:30 pm
Abstract
Shear modulus of a soil layer increases with the effective confining stress. This results in a reduction in the propagation velocity of shear waves as they travel from the bed rock towards the soil surface. In a centrifuge model prototype stresses and strains are recreated at homologous points. Thus the effective confining stress and hence the shear modulus will vary with depth in a centrifuge model. This results in a change in the propagation velocity of the shear waves as they travel from the base of the container towards the soil surface. This change in the propagation velocity was investigated by performing non-linear finite element analyses using simple single pulse and sinusoidal ground motion as well as more realistic bed rock accelerations. Based on the results from these analyses it was concluded that the variation of shear modulus with effective confining stress results in a reduction in the propagation velocity as the shear waves travel to oil surface. Also the frequency of the input bed rock motion suffers some dispersion.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
3rd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1995 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
Madabhushi, S. P. Gopal, "Numerical Modelling of Shear Wave Propagation in Centrifuge Models" (1995). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 10.
https://scholarsmine.mst.edu/icrageesd/03icrageesd/session02/10
Included in
Numerical Modelling of Shear Wave Propagation in Centrifuge Models
St. Louis, Missouri
Shear modulus of a soil layer increases with the effective confining stress. This results in a reduction in the propagation velocity of shear waves as they travel from the bed rock towards the soil surface. In a centrifuge model prototype stresses and strains are recreated at homologous points. Thus the effective confining stress and hence the shear modulus will vary with depth in a centrifuge model. This results in a change in the propagation velocity of the shear waves as they travel from the base of the container towards the soil surface. This change in the propagation velocity was investigated by performing non-linear finite element analyses using simple single pulse and sinusoidal ground motion as well as more realistic bed rock accelerations. Based on the results from these analyses it was concluded that the variation of shear modulus with effective confining stress results in a reduction in the propagation velocity as the shear waves travel to oil surface. Also the frequency of the input bed rock motion suffers some dispersion.
