Assessing soil liquefaction due to large-magnitude subduction earthquakes

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dc.contributor.authorSantiago, Yrene
dc.contributor.authorLedezma, Christian
dc.contributor.authorTiznado, Juan Carlos
dc.date.accessioned2025-01-20T16:04:19Z
dc.date.available2025-01-20T16:04:19Z
dc.date.issued2025
dc.description.abstractInfrastructure failure due to soil liquefaction has been repeatedly observed in past megathrust earthquakes, causing significant material and structural functionality losses. In most seismic regions, soil liquefaction potential is assessed using updated versions of the cyclic-stress-based simplified procedure initially proposed by Seed and Idriss in 1971. However, the application of these procedures to large-magnitude (Mw > 7.5) subduction earthquakes has shown discrepancies between forward predictions and field observations, particularly regarding liquefaction triggering and manifestation. This paper proposes an alternative model to assess soil liquefaction due to large-magnitude subduction earthquakes based on excess pore water pressure ratios and shear deformations. The triggering criteria are based on the peak values of excess pore pressure ratio and shear strain anticipated within the critical, potentially liquefiable soil layer. The model considers liquefiable layer thickness and relative density, along with input motion's Cumulative Absolute Velocity (CAV), as the main predictors of soil liquefaction. To this end, a numerical model was first developed and validated against results from a dynamic centrifuge test simulating free-field conditions. The calibrated numerical model was then used to perform a numerical parametric study to identify the trends and key predictors of liquefaction in layered soil deposits subjected to large-magnitude subduction earthquakes. Finally, a simplified probabilistic procedure, validated against available case histories, was developed to estimate the probabilities of full, marginal, and no liquefaction occurrence within each critical layer.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.soildyn.2024.109069
dc.identifier.eissn1879-341X
dc.identifier.issn0267-7261
dc.identifier.urihttps://doi.org/10.1016/j.soildyn.2024.109069
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89707
dc.identifier.wosidWOS:001358178900001
dc.language.isoen
dc.revistaSoil dynamics and earthquake engineering
dc.rightsacceso restringido
dc.subjectLiquefaction triggering
dc.subjectNumerical modeling
dc.subjectLarge-magnitude earthquakes
dc.subjectSubduction earthquakes
dc.subjectProbabilistic models
dc.titleAssessing soil liquefaction due to large-magnitude subduction earthquakes
dc.typeartículo
dc.volumen188
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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