Study of Seismic Demand on Piles in Sites Prone To Liquefaction-Induced Lateral Spreading

Abstract eng:
Lateral spreading is one of the most important effects of liquefaction because it can cause significant ground deformation and damage to existing infrastructure. In 2010, the Lo Rojas fishermen port in Coronel, southern Chile, was affected by this phenomenon due to the Mw 8.8 Maule earthquake. To identify and to model the soil layers at Lo Rojas fishermen port, the geotechnical model developed by [4] was used. This soil profile was obtained through an extensive field survey, including SPTs and CPTs soundings, and the application of geophysical surface techniques. The mechanical characterization of the soil layers at the site was performed by laboratory tests of the materials extracted during the exploration phase, including monotonic and cyclic triaxial tests, and resonant column experiments. With the obtained laboratory curves and the literature data, constitutive models for each soil layer were calibrated and used on a finite-element model on Plaxis® software. To properly reproduce the experimental behavior of the liquefiable soil layer, the UBC3D-PLM model was used. The results of this study will improve the understanding of the seismic demand on piles due to lateral spreading.

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