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Geomechanics and Engineering
  Volume 4, Number 1, March 2012 , pages 39-53

Numerical validation of Multiplex Acceleration Model for earthquake induced landslides
Lu Zheng*, Guangqi Chen, Kouki Zen and Kiyonobu Kasama

    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
Department of Civil and Structural Engineering, Kyushu University, Fukuoka, Japan

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