Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures

Shengwenjun Qi (Lead / Corresponding author), Jonathan Knappett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Earthquake-induced soil liquefaction can generate significant damage to low-rise structures, as evidenced in the 2010-2011 Canterbury Earthquake Sequence in New Zealand. In this paper, the structural response of low-rise structures on medium dense granular soils of different permeability (but both nominally liquefiable) was investigated using dynamic centrifuge modelling. In the tests, a series of consecutive motions from the 2010-2011Canterbury Earthquake Sequence was considered, followed by a long duration ‘double-pulse’ mo-tion from the 2011 Tohoku Earthquake which can potentially apply large inertial loads after liquefaction has been triggered. It was observed that the lower permeability test reached full liquefaction at shallow depth dur-ing shaking, while soil of higher permeability was only comparable in response in the first earthquake; in sub-sequent strong aftershocks excess pore water pressures were substantially reduced. The structural response of higher permeability soil was 10-45% larger due to the increased motion transmission ability of the soil after the initial earthquake. The structure on the higher permeability soil did, however, show reduced post-earthquake tilt in all motions tested. These results suggest that popular liquefaction triggering analyses may be limited in their ability to properly estimate the hazard posed to structures on nominally liquefiable soil when estimating resistance to subsequent motions (aftershocks).
Original languageEnglish
Title of host publicationPhysical Modelling in Geotechnics
Subtitle of host publicationProceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom
EditorsAndrew McNamara, Sam Divall, Richard Goodey, Neil Taylor, Sarah Stallebrass, Jingasha Panchal
Place of PublicationLondon
PublisherCRC Press
Pages1011-1016
Number of pages6
Volume2
Edition1
ISBN (Electronic)9780429797620
ISBN (Print)9781138344228
DOIs
Publication statusPublished - 24 Oct 2018
Event9th International Conference on Physical Modelling in Geoetchnics - City University, London, United Kingdom
Duration: 17 Jul 201820 Jul 2018

Conference

Conference9th International Conference on Physical Modelling in Geoetchnics
CountryUnited Kingdom
CityLondon
Period17/07/1820/07/18

Fingerprint

centrifugal model test
seismic response
liquefaction
earthquake
permeability
soil
structural response
aftershock
Tohoku earthquake 2011
effect
tilt
porewater
hazard
damage

Cite this

Qi, S., & Knappett, J. (2018). Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures. In A. McNamara, S. Divall, R. Goodey, N. Taylor, S. Stallebrass, & J. Panchal (Eds.), Physical Modelling in Geotechnics : Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom (1 ed., Vol. 2, pp. 1011-1016). London: CRC Press. https://doi.org/10.1201/9780429438646
Qi, Shengwenjun ; Knappett, Jonathan. / Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures. Physical Modelling in Geotechnics : Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. editor / Andrew McNamara ; Sam Divall ; Richard Goodey ; Neil Taylor ; Sarah Stallebrass ; Jingasha Panchal. Vol. 2 1. ed. London : CRC Press, 2018. pp. 1011-1016
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title = "Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures",
abstract = "Earthquake-induced soil liquefaction can generate significant damage to low-rise structures, as evidenced in the 2010-2011 Canterbury Earthquake Sequence in New Zealand. In this paper, the structural response of low-rise structures on medium dense granular soils of different permeability (but both nominally liquefiable) was investigated using dynamic centrifuge modelling. In the tests, a series of consecutive motions from the 2010-2011Canterbury Earthquake Sequence was considered, followed by a long duration ‘double-pulse’ mo-tion from the 2011 Tohoku Earthquake which can potentially apply large inertial loads after liquefaction has been triggered. It was observed that the lower permeability test reached full liquefaction at shallow depth dur-ing shaking, while soil of higher permeability was only comparable in response in the first earthquake; in sub-sequent strong aftershocks excess pore water pressures were substantially reduced. The structural response of higher permeability soil was 10-45{\%} larger due to the increased motion transmission ability of the soil after the initial earthquake. The structure on the higher permeability soil did, however, show reduced post-earthquake tilt in all motions tested. These results suggest that popular liquefaction triggering analyses may be limited in their ability to properly estimate the hazard posed to structures on nominally liquefiable soil when estimating resistance to subsequent motions (aftershocks).",
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Qi, S & Knappett, J 2018, Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures. in A McNamara, S Divall, R Goodey, N Taylor, S Stallebrass & J Panchal (eds), Physical Modelling in Geotechnics : Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. 1 edn, vol. 2, CRC Press, London, pp. 1011-1016, 9th International Conference on Physical Modelling in Geoetchnics, London, United Kingdom, 17/07/18. https://doi.org/10.1201/9780429438646

Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures. / Qi, Shengwenjun (Lead / Corresponding author); Knappett, Jonathan.

Physical Modelling in Geotechnics : Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. ed. / Andrew McNamara; Sam Divall; Richard Goodey; Neil Taylor; Sarah Stallebrass; Jingasha Panchal. Vol. 2 1. ed. London : CRC Press, 2018. p. 1011-1016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures

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N2 - Earthquake-induced soil liquefaction can generate significant damage to low-rise structures, as evidenced in the 2010-2011 Canterbury Earthquake Sequence in New Zealand. In this paper, the structural response of low-rise structures on medium dense granular soils of different permeability (but both nominally liquefiable) was investigated using dynamic centrifuge modelling. In the tests, a series of consecutive motions from the 2010-2011Canterbury Earthquake Sequence was considered, followed by a long duration ‘double-pulse’ mo-tion from the 2011 Tohoku Earthquake which can potentially apply large inertial loads after liquefaction has been triggered. It was observed that the lower permeability test reached full liquefaction at shallow depth dur-ing shaking, while soil of higher permeability was only comparable in response in the first earthquake; in sub-sequent strong aftershocks excess pore water pressures were substantially reduced. The structural response of higher permeability soil was 10-45% larger due to the increased motion transmission ability of the soil after the initial earthquake. The structure on the higher permeability soil did, however, show reduced post-earthquake tilt in all motions tested. These results suggest that popular liquefaction triggering analyses may be limited in their ability to properly estimate the hazard posed to structures on nominally liquefiable soil when estimating resistance to subsequent motions (aftershocks).

AB - Earthquake-induced soil liquefaction can generate significant damage to low-rise structures, as evidenced in the 2010-2011 Canterbury Earthquake Sequence in New Zealand. In this paper, the structural response of low-rise structures on medium dense granular soils of different permeability (but both nominally liquefiable) was investigated using dynamic centrifuge modelling. In the tests, a series of consecutive motions from the 2010-2011Canterbury Earthquake Sequence was considered, followed by a long duration ‘double-pulse’ mo-tion from the 2011 Tohoku Earthquake which can potentially apply large inertial loads after liquefaction has been triggered. It was observed that the lower permeability test reached full liquefaction at shallow depth dur-ing shaking, while soil of higher permeability was only comparable in response in the first earthquake; in sub-sequent strong aftershocks excess pore water pressures were substantially reduced. The structural response of higher permeability soil was 10-45% larger due to the increased motion transmission ability of the soil after the initial earthquake. The structure on the higher permeability soil did, however, show reduced post-earthquake tilt in all motions tested. These results suggest that popular liquefaction triggering analyses may be limited in their ability to properly estimate the hazard posed to structures on nominally liquefiable soil when estimating resistance to subsequent motions (aftershocks).

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DO - 10.1201/9780429438646

M3 - Conference contribution

SN - 9781138344228

VL - 2

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BT - Physical Modelling in Geotechnics

A2 - McNamara, Andrew

A2 - Divall, Sam

A2 - Goodey, Richard

A2 - Taylor, Neil

A2 - Stallebrass, Sarah

A2 - Panchal, Jingasha

PB - CRC Press

CY - London

ER -

Qi S, Knappett J. Centrifuge modelling of the effects of soil liquefiability on seismic response of low-rise structures. In McNamara A, Divall S, Goodey R, Taylor N, Stallebrass S, Panchal J, editors, Physical Modelling in Geotechnics : Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. 1 ed. Vol. 2. London: CRC Press. 2018. p. 1011-1016 https://doi.org/10.1201/9780429438646