On a Possible Role of Rayleigh Surface Waves in Dynamic Slope Failures
On a Possible Role of Rayleigh Surface Waves in Dynamic Slope Failures
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DOI：
10.1061/(asce)gm.1943-5622.0000057
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发表时间：
2010-01
影响因子：
3.7
通讯作者：
K. Uenishi
中科院分区：
文献类型：
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作者：
K. Uenishi
本文研究了表面波对边坡动力特性的影响。特别是，瑞利面波的相互作用，可能产生的地震或附近的爆破，与一个简单的楔形边坡被认为是。二维弹性动力学分析表明，在坡顶处反射和透射的表面波的振幅和相移强烈依赖于坡面倾角，反射波和入射波的叠加可能引起大的应力放大，从而在坡顶面产生张开裂缝。利用半解析计算结果，研究了1978年日本宫城县大地震引起仙台市边坡失稳的动力学机制。最后，通过与体波的对比，讨论了瑞利波传播对边坡动力稳定性影响的意义。
This contribution addresses the effect of a surface wave on the dynamic behavior of a slope. In particular, the interaction of a Rayleigh surface wave, possibly generated by an earthquake or nearby blasting, with a simple wedge-shaped slope is considered. A two-dimensional elastodynamic analysis suggests that the amplitudes and phase shifts of the surface waves reflected and transmitted at the crest strongly depends on the inclination of the slope face, and the superimposition of the reflected and incident waves may induce large stress amplification and thus produce open cracks in the top surface of the slope. The computational semianalytical results are used to investigate the generation mechanism of slope failure caused in the city of Sendai dynamically by the 1978 Miyagi-ken-oki, Japan, earthquake. Finally, the significance of the effect of Rayleigh wave propagation on dynamic slope stability is discussed in comparison with the influence of body waves.