论文部分内容阅读
为研究地震作用下含结构面边坡的超低摩擦效应及启滑机制,将含单一结构面边坡简化为等效质量-粘弹性模型,采用理论分析与数值模拟相结合,以结构面法向应力状态及滑体与基岩的相对法向速度和位移为研究对象,得到了地震作用下基岩-滑体相对法向速度和位移以及结构面法向应力变化规律,揭示了含单一结构面边坡系统超低摩擦效应的实质。结果表明:地震载荷的波动造成滑体与基岩法向相对位移正负交替,结构面法向动应力正负变换,当结构面法向动应力为负时,系统出现超低摩擦效应,坡体发生累进性变形破坏。
In order to study the ultra-low friction effect and the sliding mechanism of the slope with structural surface under the action of earthquake, the slope with single structural plane is simplified to the equivalent mass-viscoelastic model. By combining the theoretical analysis and numerical simulation, The relative normal velocities and displacements of the slide body and the bedrock are taken as the research objects. The law of relative normal velocities and displacements of the bedrock body and the normal direction of the structure plane under earthquake action is obtained, The essence of ultralow friction effect of side slope system. The results show that the fluctuation of seismic load causes positive and negative normal relative displacements of the slide body and bedrock, and the normal dynamic stress of the structure surface transforms positively and negatively. When the normal dynamic stress of the structural plane is negative, the system exhibits ultra-low friction effect. Body progressive deformation damage.