Imperial College London
Alternate

Dr J Antonio H Carraro

Faculty of Engineering, Department of Civil and Environmental Engineering

Honorary Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6038antonio.carraro Website

 
 
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Location

 

528BSkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Carraro:2017:10.1080/17486025.2016.1193635,
author = {Carraro, JAH},
doi = {10.1080/17486025.2016.1193635},
journal = {Geomechanics and Geoengineering: an international journal},
pages = {169--180},
title = {Analysis of simple shear tests with cell pressure confinement},
url = {http://dx.doi.org/10.1080/17486025.2016.1193635},
volume = {12},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The high cost of offshore infrastructure provides continuous encouragement for optimisation of design practices. Development of a more rational method to interpret results from simple shear tests with cell pressure confinement can reduce costs and improve reliability of offshore infrastructure. This paper addresses a commonly overlooked issue affecting design parameter selection: specimen shape varies from right cylinder to oblique cylinder after loading along a single shearing direction. Thus, horizontal stresses are not always equal to the cell pressure and their magnitude varies throughout the specimen’s lateral surface. An analysis is proposed that accounts for changing specimen geometry and lateral surface area during shearing and for the actual effect of cell pressure during testing. The analysis also describes how the intermediate principal stress can be assessed. Test results for medium dense silica sand are interpreted following de Josselin de Jong’s alternative shearing mechanism hypothesis. Conventional interpretation methods yield conservative design parameters for this soil. Failure states develop when the intermediate principal effective stress is halfway between major and minor principal effective stresses. Typical results for the soil tested show equipment performance meets standard direct simple shear requirements for shear strain rate, vertical stress and specimen height control.
AU  - Carraro,JAH
DO  - 10.1080/17486025.2016.1193635
EP  - 180
PY  - 2017///
SN  - 1748-6025
SP  - 169
TI  - Analysis of simple shear tests with cell pressure confinement
T2  - Geomechanics and Geoengineering: an international journal
UR  - http://dx.doi.org/10.1080/17486025.2016.1193635
UR  - https://www.tandfonline.com/doi/full/10.1080/17486025.2016.1193635
UR  - http://hdl.handle.net/10044/1/42582
VL  - 12
ER  -
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