| 田小甫.结构面对岩质边坡地震动影响的数值模拟研究[J].地质与勘探,2012,48(4):840-846 |
| 结构面对岩质边坡地震动影响的数值模拟研究 |
| Numerical Simulation of the Influence of Structural Planes on Seismic Motion on Rock Slopes |
| 投稿时间：2011-11-21 修订日期：2012-02-21 |
| DOI： |
| 中文关键词: 岩质边坡 结构面 地震动加速度放大系数 数值模拟 |
| 英文关键词: rock slope,structural plane,amplification coefficient of seismic motion,numerical simulation |
| 基金项目: |
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| 中文摘要: |
| [摘 要] 本文采用数值模拟的方法,利用UDEC 软件,开展了结构面对岩质边坡地震动影响的数值
模拟研究,研究内容涉及结构面产状和位置变化对岩体边坡地震动放大系数空间展布的影响。根据岩
体边坡中结构面发育的一般规律,本文模型工况主要考虑与坡面相交的贯穿性结构面,模拟的主要物理
对象是层面、贯穿性长大软弱结构面等。数值模拟结果表明:结构面越靠近坡顶,边坡上部的地震动响
应越强烈;顺倾结构面会使坡肩部形成更强烈的地震动响应;边坡越陡,坡顶和坡肩部的地震动响应越
强烈。上述规律对于岩质边坡地震稳定性分析具有指导意义。 |
| 英文摘要: |
| Abstract:Numerical simulation with software UDEC is conducted to study the influence of structural planes on the earthquake motion on rock slopes.The study deals with the influence of varying attitudes and positions of structure planes on the amplification of earthquake motion on rock slopes.According to general situations of structure planes developing in rock slopes,this study focuses on penetrating structural planes intersecting with the slope
surface. And the primary objectives of simulation are strata layers and long penetrating weak structural planes. The results show that the closer the structural plane to the top surface of the slope,the stronger the earthquake response of the slope is. The structural plane downward to the slope surface willcause stronger earthquake motion on the upper slope body than that caused by structural planes horizontal or anti-dip to the slope surface. A steeper slopesurface can produce stronger earthquake motion on the top or shoulder of the slope. The laws above mentioned will be valuable references to the earthquake stability analysis of rock slopes. |
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