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Estimation of dynamic friction and movement history of large landslides
https://nied-repo.bosai.go.jp/records/4183
https://nied-repo.bosai.go.jp/records/41831337c175-9f36-40a8-9dd2-09dc493ad724
| Item type | researchmap(1) | |||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Estimation of dynamic friction and movement history of large landslides | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
Masumi Yamada
× Masumi Yamada
× Anne Mangeney
× Yuki Matsushi
× Takanori Matsuzawa
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | We performed seismic waveform inversions and numerical landslide simulations of deep-seated landslides in Japan to understand the dynamic evolution of friction of the landslides. By comparing the forces obtained from a numerical simulation to those resolved from seismic waveform inversion, the coefficient of friction during sliding was well-constrained between 0.3 and 0.4 for landslides with volumes of 2–8 ×106 m3. We obtained similar coefficients of friction for landslides with similar scale and geology, and they are consistent with the empirical relationship between the volume and dynamic coefficient of friction obtained from the past studies. This hybrid method of the numerical simulation and seismic waveform inversion shows the possibility of reproducing or predicting the movement of a large-scale landslide. Our numerical simulation allows us to estimate the velocity distribution for each time step. The maximum velocity at the center of mass is 12–36 m/s and is proportional to the square root of the elevation change at the center of mass of the landslide body, which suggests that they can be estimated from the initial DEMs. About 20% of the total potential energy is transferred to the kinetic energy in our volume range. The combination of the seismic waveform inversion and the numerical simulation helps to obtain the well-constrained dynamic coefficients of friction and velocity distribution during sliding, which will be used in numerical models to estimate the hazard of potential landslides. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Landslides 巻 15, 号 10, p. 1-12 |
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| 出版者 | ||||||||||||||
| 言語 | en | |||||||||||||
| 出版者 | Springer Verlag | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 1612-5118 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1007/s10346-018-1002-4 | |||||||||||||
