(1. Key Laboratory of Loess Earthquake Engineering，Lanzhou Institute of Seismology，CEA，Lanzhou，Gansu 730000，China； 2. Geotechnical Disaster Prevention Engineering Technology Research Center of Gansu Province，Lanzhou Institute of Seismology，CEA，Lanzhou，Gansu 730000，China)
To explore dynamic response features，deformation evolution process and failure mechanism of loess slope under the coupled effect of earthquake and rainfall，two model tests of loess slope with 100 mm rainfall and natural state were carried out to compare and analyze change features of macroscopical deformation and related physical quantities such as acceleration，pore pressure and soil pressure，etc. The results indicate that natural vibration frequency in loess slope model after rainfall is reduced as well as damping ratio is increased and amplification effects of seismic oscillation are enhanced. Under effect of strong shock，the soil in the top of the slope are seismically settled and liquified and liquified soil would slip along the slope under follow-up seismic oscillation. In line with changes in macroscopical deformation，pore pressure and soil pressure in the slope model，the failure process can be divided into four phases，namely elastic deformation phase，rapid increase phase of residual deformation，liquification slipping phase and creeping phase. Macroscopical deformation，pore pressure and soil pressure of the soil in different phases are with their own characteristics.
王兰民1，2，蒲小武1，吴志坚1，2，孙军杰1，2，王 平1，2，柴少峰1，2，徐舜华1，2，邓 津1，2. 地震和降雨耦合作用下黄土边坡失稳滑移的振动台试验研究[J]. 岩石力学与工程学报, 2017, 36(S2): 3873-3883.
王兰民1，2，蒲小武1，吴志坚1，2，孙军杰1，2，王 平1，2，柴少峰1，2，徐舜华1，2，邓 津1，2. The shaking table test of the instability sliding of loess slope under the coupling effects of earthquake and rainfall. , 2017, 36(S2): 3873-3883.
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2017, Vol. 36 
