Abstract

Because of the complexity of interactions between seismic waves and rock masses, the dynamic response of slopes has typical multi-domain characteristics. To fully consider the multi-domain characteristics of ground motion, the dynamic response of a rock slope containing weak structural planes was systematically investigated in the time domain, frequency domain, and time-frequency domain. Two-dimensional dynamic analyses were carried out on two numerical models, including the homogeneous slope- and slope-containing structural planes. The results show that slopes containing structural planes have dynamic topographic and geological amplification effects. Based on the frequency-domain analysis, the relationship between the frequency of waves and the dynamic response of slopes was further studied. The geological structure influences the high-frequency components of waves in slopes containing structural planes. The analyses of the marginal spectrum show that seismic energy is mainly concentrated in the frequency band of waves (7–10 Hz). In addition, the seismic failure mechanism of slopes containing structural planes was explored. Structural planes have an important effect on the seismic failure mode of slopes containing structural planes. Multi-domain coupling analysis can reveal the seismic response characteristics of slopes more comprehensively and provide a reference for the seismic design of rock slopes.

摘要

由于地震波与岩体相互作用的复杂性，边坡动力响应具有典型的多域特征。为充分考虑地震动的多域特性，从时域、频域和时频域系统研究了含弱结构面的岩质边坡动力响应。对两个数值模型进行了二维动力分析，包括均质斜坡和含斜坡结构面。结果表明，包含结构面的边坡具有动态地形和地质放大效应。在频域分析的基础上，进一步研究了波浪频率与边坡动力响应的关系。地质结构影响包含结构面的斜坡中的高频成分。边缘谱分析表明，地震能量主要集中在波的频段（7-10Hz）。此外，还探讨了含结构面边坡的地震破坏机制。结构面对包含结构面的边坡的地震破坏模式有重要影响。多域耦合分析可以更全面地揭示边坡的地震反应特征，为岩质边坡的抗震设计提供参考。探讨了含结构面边坡的地震破坏机制。结构面对包含结构面的边坡的地震破坏模式有重要影响。多域耦合分析可以更全面地揭示边坡的地震反应特征，为岩质边坡的抗震设计提供参考。探讨了含结构面边坡的地震破坏机制。结构面对包含结构面的边坡的地震破坏模式有重要影响。多域耦合分析可以更全面地揭示边坡的地震反应特征，为岩质边坡的抗震设计提供参考。