Abstract：Based on the similarity theory, a typical model of loess landslide was established. The acceleration response characteristics of the loess landslide was studied by using the advanced centrifuge shaking table technology with the implementation of combined horizontal and vertical shakes. And the mutual verifications were performed between finite difference numerical simulations and experiments. Results show that: the toward surface effect of acceleration amplification along the shallow surface layer of the landslide is obvious; the amplification effects of horizontal and vertical accelerations tend to increase nonlinearly, and the horizontal acceleration is generally larger than the vertical one. The acceleration amplification near the slip surface of the landslide exhibits the effect of lithological structure. With the increase of elevation, the acceleration response gradually increases, the elevation effect is presented, and the amplification effect at the rear of the landslide is apparent. With the increase of the intensity of the incident seismic wave, the dynamic response of the landslide increases firstly and then decreases. The deformation and failure process of the loess landslide can be summarized as: tension cracks occur at the rear of the landslide and then gradually propagate, the rear of the landslide collapses, the sliding mass slightly slides downwards with kerves formed, the middle part of the landslide bulges and a large amount of colluvial deposits stack at the slope toe. The study results provide references for the investigation of the acceleration amplification effect and deformation failure of loess landslides under earthquake, and seismic stability evaluation and seismic design of loess landslides in Tianshui area.
张泽林 吴树仁 王涛 唐辉明 梁昌玉 . 地震作用下黄土滑坡加速度深度放大效应及震后变形模式研究[J]. 土木工程学报, 2018, 51(4): 102-110.
Zhang Zelin Wu Shuren Wang Tao Tang Huiming Liang Changyu . Study on acceleration depth amplification effect and deformation model of loess landslide under earthquakes. 土木工程学报, 2018, 51(4): 102-110.
