基于非一致性时空序列的堆积型边坡地震稳定性二元分析理论

堆积型边坡在地震区广泛分布，其稳定性是影响国民经济发展的重要问题，分析理论上的缺陷是制约边坡稳定性分析理论不断发展的瓶颈。虽然已有文献探讨了地震作用下堆积型边坡的稳定性分析方法、失稳机理等，但鲜有文献从波动理论研究地震波从滑床→滑带→滑体的传播及演化规律，无法回答滑带对地震波的散射效应及其对滑带变形特征的影响，而这正是诱发滑坡的原动力。据此，本课题以振动台试验、理论分析及数值模拟为手段，以研究坡体中地震波的传播规律为主线，以滑带的动力特性和变形特征为桥梁，解决非均匀平面奇异衰减地震波的波动特性、振动台试验中非一致性相似率等科学问题，探明地震作用下堆积型边坡的滑塌机制和动力特征，统筹考虑坡体运动在空间和时间上的不一致性，将安全性系数和坡体永久位移有机结合，建立了基于非一致性时空序列的堆积型边坡地震稳定性二元分析理论，冀望对堆积型边坡工程的安全、合理抗震设计和相应稳定性分析理论的发展有所贡献。

The accumulation-type slope is wide-spread in the earthquake zone, whose seismic stabilization is the important problem affecting the development of social economy and its theoretic defects also is the restrictive factor for science development. Although some studies have been done on the analysis method of stabilization of the accumlation-type slope and failure mechanism of landslides triggered by earthquakes, but few studies discussed propagation and evolution of seismic waves from landslide bed → sliding band → sliding body, and so effect of sliding-band scatter and its effect on the deformation of sliding band can’t be answered, which is the reason causing the landslide. Therefore, this project will use the shaking table test, theory analysis and numerical simulation to perform our studies. In the study, the propagation law of the inhomogeneous seismic wave in the slope is the main line of research, and the dynamic characteristic of sliding band is the bridge. The wave characteristic of the unique and damping seismic wave and the non-consistent similar theory have been solved, and the landslide mechanism and dynamic characteristic is studied. At last, the Stabilization of accumulation-type slope under earthquake based on non-uniformity temporal and spatial sequence theory is established, which can consider the non-uniformity temporal and spatial motion, and the safety coefficient and permanent displacement of slope can be unified under the same system, the above research results will be helpful for the seismic designs and the analysis theory of the stability of accumulation-type slope.