NUMERICAL AND EXPERIMENTAL STUDY ON THE BEHAVIOR OF PILES SUBJECTED TO LIQUEFACTION-INDUCED LATERAL SPREADING

Yung Yen Ko, Pei Jou Chang

Research output: Contribution to journalArticlepeer-review

Abstract

Soil liquefaction is a destructive geotechnical hazard during earthquakes which causes not only ground settlement and foundation bearing capacity reduction but also lateral spreading of the ground. Lateral spreading can be harmful to embedded structures such as piles and hence may dominate the seismic design of piles. In this study, the behavior of piles subjected to liquefaction-induced lateral spreading was characterized by investigating a pile damage case during the 1964 Niigata, Japan earthquake. Firstly, both flow displacement and flow pressure approaches for modelling of lateral spreading and the beam on nonlinear Winkler foundation method for modeling of pile-soil interaction were adopted to numerically simulate the reality and an existing centrifuge test of the case. Then, a 1 g scaled physical model test was performed through compulsorily displacing a model ground which was liquefied by upward seepage to approximate the action of lateral spreading on the pile. The obtained results were compared with those from the field observations and existing study concerning the deformation, moment and soil reaction distribution, and damage mode of the pile. It was shown that the flow displacement approach better approximated the investigated case in which the pile penetration depth into the non-liquefied base layer was relatively small. The analyzed moment and soil reaction distribution along the pile were closer to those observed in the tests, leading to flexural damage of the pile near the interface of liquefied and non-liquefied layers just like the reality.

Original languageEnglish
Pages (from-to)47-58
Number of pages12
JournalJournal of GeoEngineering
Volume19
Issue number1
DOIs
Publication statusPublished - 2024

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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