Imperial College London
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ProfessorPeterStafford

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Engineering Seismology
 
 
 
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Contact

 

+44 (0)20 7594 7916p.stafford

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

321Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Ulmer:2018:10.1061/9780784481486.012,
author = {Ulmer, KJ and Upadhyaya, S and Green, RA and Rodriguez-Marek, A and Stafford, PJ and Bommer, JJ and van, Elk J},
doi = {10.1061/9780784481486.012},
pages = {112--121},
title = {A Critique of b-Values Used for Computing Magnitude Scaling Factors},
url = {http://dx.doi.org/10.1061/9780784481486.012},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - © 2018 American Society of Civil Engineers. The objective of this paper is to explore the effects of relative density, effective confining stress, and liquefaction initiation criteria on the slope (or b-value) of the cyclic stress ratio versus number of uniform stress cycles to liquefaction curve in log-log space. The b-value is central to the computation of magnitude scaling factors (MSF) used in evaluating liquefaction potential and can be determined from cyclic laboratory tests such as cyclic triaxial (CTRX), cyclic simple shear (CSS), and cyclic torsional (CTS) tests. This paper provides a summary of b-values calculated from published test data representing multiple types of laboratory tests, sands, sample preparation methods, and liquefaction criteria. Trends between b-values and relative density are shown to be more ambiguous than is often assumed. Effective confining stresses and liquefaction criteria are also shown to have an effect on b-values.
AU  - Ulmer,KJ
AU  - Upadhyaya,S
AU  - Green,RA
AU  - Rodriguez-Marek,A
AU  - Stafford,PJ
AU  - Bommer,JJ
AU  - van,Elk J
DO  - 10.1061/9780784481486.012
EP  - 121
PY  - 2018///
SN  - 0895-0563
SP  - 112
TI  - A Critique of b-Values Used for Computing Magnitude Scaling Factors
UR  - http://dx.doi.org/10.1061/9780784481486.012
ER  -
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