A comparison between DDA and DEM in numerical simulations of earthquake induced landslides

Guangqi Chen; Lu Zheng; Kouki Zen

A comparison between DDA and DEM in numerical simulations of earthquake induced landslides

Guangqi Chen, Lu Zheng, Kouki Zen

Division for Experimental Natural Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Due to strong ground motion of earthquake, the debris sliding at high velocity can travel a distance several times longer than the height of the slope. It is suggested that the energy is transported from slope to debris mass by the collisions occurred during earthquake. In order to simulation this unexpected motion process with DDA, the displacement accuracy of DDA applied to collision is investigated in this paper. With appropriately estimated contact resistance force, it shows that the behavior of the system trends toward the analytic solution and the resulting precision is sufficient. Finally, a comparison of behavior under collision between DDA and DEM is discussed based on the simulation results.

Original language	English
Title of host publication	Geomechanics and Geotechnics
Subtitle of host publication	From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010
Pages	551-557
Number of pages	7
Publication status	Published - Dec 1 2011
Event	International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010 - Shanghai, China Duration: Oct 10 2010 → Oct 12 2010

Publication series

Name	Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010
Volume	1

Other

Other	International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010
Country/Territory	China
City	Shanghai
Period	10/10/10 → 10/12/10

All Science Journal Classification (ASJC) codes

Geotechnical Engineering and Engineering Geology

Cite this

Chen, G., Zheng, L., & Zen, K. (2011). A comparison between DDA and DEM in numerical simulations of earthquake induced landslides. In Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010 (pp. 551-557). (Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010; Vol. 1).

A comparison between DDA and DEM in numerical simulations of earthquake induced landslides. / Chen, Guangqi; Zheng, Lu; Zen, Kouki.
Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010. 2011. p. 551-557 (Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Chen, G, Zheng, L & Zen, K 2011, A comparison between DDA and DEM in numerical simulations of earthquake induced landslides. in Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010. Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010, vol. 1, pp. 551-557, International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010, Shanghai, China, 10/10/10.

Chen G, Zheng L, Zen K. A comparison between DDA and DEM in numerical simulations of earthquake induced landslides. In Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010. 2011. p. 551-557. (Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010).

Chen, Guangqi ; Zheng, Lu ; Zen, Kouki. / A comparison between DDA and DEM in numerical simulations of earthquake induced landslides. Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010. 2011. pp. 551-557 (Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010).

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abstract = "Due to strong ground motion of earthquake, the debris sliding at high velocity can travel a distance several times longer than the height of the slope. It is suggested that the energy is transported from slope to debris mass by the collisions occurred during earthquake. In order to simulation this unexpected motion process with DDA, the displacement accuracy of DDA applied to collision is investigated in this paper. With appropriately estimated contact resistance force, it shows that the behavior of the system trends toward the analytic solution and the resulting precision is sufficient. Finally, a comparison of behavior under collision between DDA and DEM is discussed based on the simulation results.",

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N2 - Due to strong ground motion of earthquake, the debris sliding at high velocity can travel a distance several times longer than the height of the slope. It is suggested that the energy is transported from slope to debris mass by the collisions occurred during earthquake. In order to simulation this unexpected motion process with DDA, the displacement accuracy of DDA applied to collision is investigated in this paper. With appropriately estimated contact resistance force, it shows that the behavior of the system trends toward the analytic solution and the resulting precision is sufficient. Finally, a comparison of behavior under collision between DDA and DEM is discussed based on the simulation results.

AB - Due to strong ground motion of earthquake, the debris sliding at high velocity can travel a distance several times longer than the height of the slope. It is suggested that the energy is transported from slope to debris mass by the collisions occurred during earthquake. In order to simulation this unexpected motion process with DDA, the displacement accuracy of DDA applied to collision is investigated in this paper. With appropriately estimated contact resistance force, it shows that the behavior of the system trends toward the analytic solution and the resulting precision is sufficient. Finally, a comparison of behavior under collision between DDA and DEM is discussed based on the simulation results.

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A comparison between DDA and DEM in numerical simulations of earthquake induced landslides

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