Modified Performance-Based Liquefaction Triggering Procedure Using Liquefaction Loading Parameter Maps
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 3
Abstract
Simplified performance-based liquefaction triggering procedures have sought to address observed inconsistencies in predicted liquefaction triggering hazards across the United States resulting from conventional, pseudoprobabilistic analysis procedures. Unfortunately, current simplified performance-based procedures are limited to use with a single liquefaction triggering curve. This paper introduces a modified performance-based procedure and applies it to a different liquefaction triggering curve that is currently used by many engineering practitioners. The modified procedure is derived, and the concept of liquefaction loading parameter maps is introduced. Validation of the modified procedure against the full performance-based procedure is performed for multiple U.S. cities and soil profiles at three different return periods. The results of the validation demonstrate that the modified performance-based procedure reasonably approximates the full performance-based procedure across multiple return periods, though it tends to slightly underpredict the full performance-based results on average. Some discussion regarding the limitations and potential benefits of this modified procedure is provided.
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Acknowledgments
Funding for this study was provided by a Federal Highway Administration Pooled Fund Study (Award No. TPF-5(296), with participation from Utah, Alaska, Connecticut, Idaho, Montana, and South Carolina state departments of transportation). We gratefully acknowledge this support. However, the conclusions and opinions expressed in this paper do not necessarily reflect those of our sponsors.
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© 2015 American Society of Civil Engineers.
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Received: Dec 30, 2014
Accepted: Aug 24, 2015
Published online: Nov 19, 2015
Published in print: Mar 1, 2016
Discussion open until: Apr 19, 2016
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