Centrifuge Modelling of Vegetated Slopes under Earthquake Loading

T. Liang (Lead / Corresponding author), J. A. Knappett

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

Abstract

The behavior of vegetation-reinforced slopes during a sequence of successive earthquake motions was investigated using centrifuge model tests at 1:10 scale. The model roots used in this study were fabricated using Acrylonitrile Butadiene Styrene (ABS) plastic using 3D printing (rapid prototyping). It is shown that in this case, the presence of root system significantly decreases permanent settlement at the crest of the slope. The majority of the reduction was observed during the first two motions, which was related to the mobilization of the root-soil interaction as the roots bend in response to the soil kinematic loading. After this, less difference was observed because the root shear strength contribution reached a limiting value. Discontinuity Layout Optimisation (DLO) calculation was then employed to better understand the failure mechanism of rooted slope and it was found that the improvement of slope performance is mainly mobilized by the increase of yield acceleration and decrease of acceleration response spectra (ARS).
Original languageEnglish
Title of host publication6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering
Number of pages8
Publication statusPublished - 2015
Event6th International Conference on Earthquake Geotechnical Engineering - Christchurch, New Zealand
Duration: 1 Nov 20154 Nov 2015
http://www.6icege.com/ (Link to Conference website)

Conference

Conference6th International Conference on Earthquake Geotechnical Engineering
Abbreviated title6ICEGE
CountryNew Zealand
CityChristchurch
Period1/11/154/11/15
Internet address

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centrifugal model test
earthquake
failure mechanism
centrifuge
root system
model test
shear strength
mobilization
discontinuity
soil
kinematics
plastic
vegetation

Cite this

Liang, T., & Knappett, J. A. (2015). Centrifuge Modelling of Vegetated Slopes under Earthquake Loading. In 6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering [304]
Liang, T. ; Knappett, J. A. / Centrifuge Modelling of Vegetated Slopes under Earthquake Loading. 6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering. 2015.
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title = "Centrifuge Modelling of Vegetated Slopes under Earthquake Loading",
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author = "T. Liang and Knappett, {J. A.}",
note = "The first author would like to acknowledge the financial support of the China Scholarship Council",
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Liang, T & Knappett, JA 2015, Centrifuge Modelling of Vegetated Slopes under Earthquake Loading. in 6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering., 304, 6th International Conference on Earthquake Geotechnical Engineering, Christchurch, New Zealand, 1/11/15.

Centrifuge Modelling of Vegetated Slopes under Earthquake Loading. / Liang, T. (Lead / Corresponding author); Knappett, J. A.

6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering. 2015. 304.

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

TY - GEN

T1 - Centrifuge Modelling of Vegetated Slopes under Earthquake Loading

AU - Liang, T.

AU - Knappett, J. A.

N1 - The first author would like to acknowledge the financial support of the China Scholarship Council

PY - 2015

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N2 - The behavior of vegetation-reinforced slopes during a sequence of successive earthquake motions was investigated using centrifuge model tests at 1:10 scale. The model roots used in this study were fabricated using Acrylonitrile Butadiene Styrene (ABS) plastic using 3D printing (rapid prototyping). It is shown that in this case, the presence of root system significantly decreases permanent settlement at the crest of the slope. The majority of the reduction was observed during the first two motions, which was related to the mobilization of the root-soil interaction as the roots bend in response to the soil kinematic loading. After this, less difference was observed because the root shear strength contribution reached a limiting value. Discontinuity Layout Optimisation (DLO) calculation was then employed to better understand the failure mechanism of rooted slope and it was found that the improvement of slope performance is mainly mobilized by the increase of yield acceleration and decrease of acceleration response spectra (ARS).

AB - The behavior of vegetation-reinforced slopes during a sequence of successive earthquake motions was investigated using centrifuge model tests at 1:10 scale. The model roots used in this study were fabricated using Acrylonitrile Butadiene Styrene (ABS) plastic using 3D printing (rapid prototyping). It is shown that in this case, the presence of root system significantly decreases permanent settlement at the crest of the slope. The majority of the reduction was observed during the first two motions, which was related to the mobilization of the root-soil interaction as the roots bend in response to the soil kinematic loading. After this, less difference was observed because the root shear strength contribution reached a limiting value. Discontinuity Layout Optimisation (DLO) calculation was then employed to better understand the failure mechanism of rooted slope and it was found that the improvement of slope performance is mainly mobilized by the increase of yield acceleration and decrease of acceleration response spectra (ARS).

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M3 - Conference contribution

BT - 6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering

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Liang T, Knappett JA. Centrifuge Modelling of Vegetated Slopes under Earthquake Loading. In 6ICEGE - Proceedings of the 6th International Conference on Earthquake Geotechnical Engineering. 2015. 304