Geotechnical Earthquake Engineering and Soil Dynamics V
A Simplified Procedure for Evaluating Post-Seismic Settlements in Liquefiable Soils
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
The importance of predicting ground deformation in loose, saturated granular soils has been widely recognized for a reliable evaluation of liquefaction damage. A procedure is proposed in this paper for the evaluation of post-cyclic consolidation settlements, as a result of volumetric strains induced by the dissipation of excess pore pressure. A stress-based model is first adopted for generating the excess pore water pressure in 1D free-field conditions, allowing for an effective stress analysis according to a loosely coupled approach. Then, the post-cyclic settlement is simply calculated integrating the vertical strains. To this aim, by considering a well-documented case history in which an extremely small settlement was observed upon seismic excitation, soil stiffness is estimated on the basis of either CPT data or shear stiffness decay curve, to show the effect of modelling hypothesis on the results. Both approaches result into a value of the settlement close to the observed one and much lower than that calculated using a well-established empirical procedure.
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ACKNOWLEDGMENTS
This work was carried out as part of the European project Horizon 2020 – Assessment and Mitigation of liquefaction potential across Europe: A holistic approach to protect structures infrastructures for improved resilience to earthquake – induced liquefaction disasters – “LIQUEFACT” (grant agreement No 700748).
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Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 51 - 59
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
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Jun 7, 2018
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