Imperial College London
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ProfessorCatherineO'Sullivan

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Particulate Soil Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 6117cath.osullivan Website

 
 
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Location

 

501Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dutta:2020:10.1016/j.sandf.2020.07.008,
author = {Dutta, TT and Otsubo, M and Kuwano, R and O'Sullivan, C},
doi = {10.1016/j.sandf.2020.07.008},
journal = {Soils and Foundations},
pages = {1357--1370},
title = {Evolution of shear wave velocity during triaxial compression},
url = {http://dx.doi.org/10.1016/j.sandf.2020.07.008},
volume = {60},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Accurate design of geotechnical structures requires precise estimation of the shear wave velocity (Vs) and the small-strain shear modulus. However, the interpretation of Vs data measured in deformed/sheared soil has not been extensively considered. This study used a triaxial apparatus equipped with planar piezoelectric transducers to monitor the evolution of Vs during triaxial compression of cohesionless soils. Recognizing that the grain shape and surface characteristics affect the overall mechanical response of granular materials, various natural sands and glass bead samples were considered. Discrete element method (DEM) simulations using spherical particles were carried out to compute particle-scale responses that cannot be measured in the laboratory. The experimental results revealed that the Vs values for samples with different initial densities tend to approach one another and have similar values (merge) at large axial strains. This merging occurs at a lower strain level for spherical particles in comparison with non-spherical particles. The linear Vs-void ratio relationship, which is often developed and used for homogeneous and isotropic stress states, is no longer applicable during shearing. It is the mean coordination number that dictates the evolution of Vs during triaxial compression. Furthermore, the axial strain at which the peak Vs is achieved is found to be comparable to the axial strain at which specimen dilation takes place.
AU  - Dutta,TT
AU  - Otsubo,M
AU  - Kuwano,R
AU  - O'Sullivan,C
DO  - 10.1016/j.sandf.2020.07.008
EP  - 1370
PY  - 2020///
SN  - 0038-0806
SP  - 1357
TI  - Evolution of shear wave velocity during triaxial compression
T2  - Soils and Foundations
UR  - http://dx.doi.org/10.1016/j.sandf.2020.07.008
UR  - https://www.sciencedirect.com/science/article/pii/S0038080620337276?via%3Dihub
UR  - http://hdl.handle.net/10044/1/85317
VL  - 60
ER  -
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