Centrifuge Modeling of Liquefaction Effects on Shallow Foundations

Marques, A.S.; Coelho, Paulo; Haigh, Stuart; Madabhushi, Spg

doi:10.1007/978-3-319-00458-7_24

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…Bray et al, 2004;Cubrinovski et al, 2011;Yasuda et al, 2012). Settlement has been extensively researched, with studies employing centrifuge modelling (e.g Dashti et al, 2010a;da Silva Marques et al, 2014;Bertalot & Brennan, 2015;Adamidis & Madabhushi, 2018a) or numerical modelling (e.g Karamitros et al, 2013b,c;Karimi & Dashti, 2016;Ayoubi & Pak, 2017), and aiming either to elucidate the mechanisms that produce settlement (e.g Dashti et al, 2010b;Adamidis & Madabhushi, 2018a) or to estimate its magnitude (e.g Liu & Dobry, 1997;Bertalot et al, 2013;Bray & Macedo, 2017;Bullock et al, 2019b). Tilting had not received equal attention until recently.…”

Section: Introductionmentioning

confidence: 99%

Rocking response of structures with shallow foundations on thin liquefiable layers

Adamidis

Madabhushi

2022

Géotechnique

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In the event of an earthquake, structures with shallow foundations that rest on liquefiable layers can suffer excessive settlement and rotation. In this paper, the rotational response of structures with shallow foundations resting on liquefiable layers with thickness equal to or smaller than the width of the foundation is examined through a series of dynamic centrifuge experiments. Moment-rotation backbone curves are extracted and the corresponding evolution of rocking stiffness with increasing rotation is depicted, in normalised terms. The proposed stiffness attenuation relation can be used for simplified predictions of maximum and residual rotation using rotational spring and dashpot models. Two such examples are presented, one using an iterative, equivalentlinear rotational spring approximation, and one using Masing's rules for cyclic response, as extended with Pyke's hypothesis.

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Section: Introductionmentioning

confidence: 99%

Rocking response of structures with shallow foundations on thin liquefiable layers

Adamidis

Madabhushi

2022

Géotechnique

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Centrifuge Tests of Adjacent Mat-Supported Buildings Affected by Liquefaction

Hayden

Zupan²,

Bray

et al. 2015

J. Geotech. Geoenviron. Eng.

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Critical State–Based Interpretation of the Monotonic Behavior of Hostun Sand

Azeiteiro

Coelho

Taborda

et al. 2017

J. Geotech. Geoenviron. Eng.

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A series of bender element tests and drained and undrained monotonic triaxial compression and extension tests were performed on air-pluviated samples of Hostun sand. Samples were prepared to different initial void ratios, consolidated under various isotropic and anisotropic stress states and sheared using different stress-paths and a wide range of deformations to characterise the sand's stress-strain response. The results suggest that the sand's small-strain behaviour essentially depends on the current void ratio and mean effective stress. Within the medium to large strain range, a state parameter approach in conjunction with the critical state framework can successfully predict the distinctive states of the sand's monotonic response, namely the phase transformation, the peak stress ratio and the critical states. Furthermore, the data is used to examine a stress-dilatancy relationship often incorporated in constitutive models. The characterisation presented herein aims at assisting the efficient calibration of numerical models and provides insight into this sand's behaviour, thus supporting the interpretation of results of physical modelling involving this sand. This paper highlights the importance of characterising sand's behaviour over the full strain range and shows that accurate predictions of the critical state and small-strain stiffness are crucial to assess other aspects of the sand's behaviour.

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Centrifuge Modeling of Liquefaction Effects on Shallow Foundations

Cited by 4 publications

References 2 publications

Rocking response of structures with shallow foundations on thin liquefiable layers

Rocking response of structures with shallow foundations on thin liquefiable layers

Centrifuge Tests of Adjacent Mat-Supported Buildings Affected by Liquefaction

Critical State–Based Interpretation of the Monotonic Behavior of Hostun Sand

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