Characterisation of the behaviour of liquefaction triggering in a cyclic undrained simple shear test setting

Title

Characterisation of the behaviour of liquefaction triggering in a cyclic undrained simple shear test setting

 Author

Portugal, Hugo (Ramboll)
Sigaran-Loria, Carolina (Royal HaskoningDHV)
Brinkgreve, R.B.J. (TU Delft Geo-engineering) ORCID 0000-0002-8656-1321

 Date

2024

 Abstract

The definition of appropriate calibration criteria for liquefaction-simulating constitutive models in sands is essential to properly simulate a liquefied state under seismic ground motions, enabling an adequate estimation of the liquefaction hazard. Therefore, a thorough quantitative characterisation of the behaviour of liquefaction is necessary to define liquefaction-triggering criteria that can describe a liquefied state in terms of stress and deformation. This paper presents a benchmark characterisation study of the behaviour of liquefaction, where liquefaction-triggering criteria, in terms of pore pressure ratio (ru) and shear strain (γ), were determined using two cyclic undrained direct simple shear test databases of Ottawa F-65 sand. The behaviour of liquefaction was analysed considering variations of initial state, confinement pressure (σ’v0) and cyclic shearing (CSR) conditions. The onset of liquefaction-triggering markers was evaluated in terms of moment of occurrence. The research concluded that liquefaction-triggering markers ru ≈ 0.95 and γ = 3% could be used simultaneously to indicate the initiation of liquefaction in loose and dense Ottawa F-65 sand under various initial and cyclic shearing conditions.

 Subject

seismic liquefaction
Ottawa F-65 sand

 To reference this document use:

http://resolver.tudelft.nl/uuid:8f4bd81f-592c-41d3-a6d7-0608c0626d14

 Embargo date

2024-11-07

 Event

The 8th International Conference on Earthquake Geotechnical Engineering 2024, 2024-05-07 → 2024-05-10, Osaka International Convention Center, Osaka, Japan

 Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

© 2024 Hugo Portugal, Carolina Sigaran-Loria, R.B.J. Brinkgreve
Files
file embargo until 2024-11-07