Geotechnical Earthquake Engineering and Soil Dynamics V
Simplified Evaluation of Liquefaction-Induced Building Settlements
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
Liquefaction-induced settlement of buildings on shallow foundations requires evaluation of shear-induced, volumetric-induced, and ejecta-induced ground settlement mechanisms. There are few procedures for estimating the shear-induced component of building settlement due to liquefaction. Nonlinear dynamic soil-structure interaction (SSI) effective stress analyses can capture this mechanism. A simplified procedure was developed that provides building settlement estimates consistent with those calculated from the dynamic SSI effective stress analyses of a variety of buildings for generalized subsurface conditions. The liquefaction-induced building settlement (LBS) index is employed to characterize more complicated ground conditions. The proposed simplified procedure is applied to several field case histories and shown to provide estimates of liquefaction-induced building settlement consistent with those observed. Recommendations for evaluating building performance at liquefiable sites are shared.
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ACKNOWLEDGEMENTS
Support for this research was provided primarily by grants from the U.S. National Science Foundation (NSF) through grants CMMI-1332501 and CMMI-1561932. The NSF-sponsored Geotechnical Extreme Events Reconnaissance (GEER) Association funding through grant CMMI-1266418 enabled researchers including the first author to document and learn from the case histories discussed in this paper. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF. Additionally, the College of Engineering at the University of California, Berkeley provided support through the Faculty Chair in Earthquake Engineering Excellence.
Cooperation with New Zealand researchers on parts of this work was provided by the Earthquake Commission New Zealand (EQC) and University of Canterbury (UC). We would also like to acknowledge the assistance of all NZ and US GEER team members who participated in the reconnaissance of these events, as well as those who participated in the follow-on research. We thank Kenji Ishihara and Misko Cubrinovski, who shared concepts and data freely. Shideh Dashti and Z. Karimi shared the results of their comprehensive analytical study with us. We also thank all those who participated in research that supported this study, including R. Sancio, R. Luque, J. Zupan, C. Markham, C. Beyzaei, M. Stringer, M. Riemer, M. Taylor, T. O'Rourke, B. Bradley, R. Green, and several others. S. van Ballegooy, M. Jacka, R. Wentz, I. McCahon, and N. Traylen shared useful data and insights as well.
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Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 577 - 590
Editors: Scott J. Brandenberg, Ph.D., University of California, Los Angeles, and Majid T. Manzari, Ph.D., George Washington University
ISBN (Online): 978-0-7844-8145-5
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© 2018 American Society of Civil Engineers.
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Published online: Jun 7, 2018
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