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Geomechanics and Engineering Volume 4, Number 1, March 2012, pages 39-53 DOI: http://dx.doi.org/10.12989/gae.2012.4.1.039 |
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Numerical validation of Multiplex Acceleration Model for earthquake induced landslides |
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Lu Zheng*, Guangqi Chen, Kouki Zen and Kiyonobu Kasama
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| Abstract | ||
| Due to strong ground motion of earthquake, the material in the landslide can travel a significant distance from the source. A new landslide model called Multiplex Acceleration Model (MAM) has been proposed to interpret the mechanism of long run-out movement of this type of landslide, considering earthquake behaviors on slope and landslide materials. In previous study, this model was verified by a shaking table test. However, there is a scale limitation of shaking table test to investigate MAM in detail. Thus, numerical simulation was carried out in this study to validate MAM under full scale. A huge rock ejected and A truck threw upwards by seismic force during Wenchuan Earthquake (Ms. 8.0) was discussed based on the simulation results. The results indicate that collisions in P-phase of earthquake and trampoline effect are important behaviors to interpret the mechanism of long run-out and high velocity. The results show that MAM is acceptable and applicable. | ||
| Key Words | ||
| long run-out landslides; earthquake; Multiplex Acceleration Model; trampoline effect; UDEC | ||
| Address | ||
| Department of Civil and Structural Engineering, Kyushu University, Fukuoka, Japan | ||