| 高边坡在水平动荷载作用下的动力响应规律研究 |
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| 引用本文： | 秋仁东,石玉成,付长华.高边坡在水平动荷载作用下的动力响应规律研究[J].世界地震工程,2007,23(2):131-138. |
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| 作者姓名： | 秋仁东 石玉成 付长华 |
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| 作者单位： | 中国地震局兰州地震研究所,中国地震局地震预测研究所兰州科技创新基地,甘肃,兰州,730000 |
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| 基金项目： | 科技部科研院所技术开发研究专项基金;中国地震局兰州地震研究所项目;地震科学联合基金 |
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| 摘 要： | 高岩石边坡在水平动荷载作用下的动力响应规律是有关工程界十分关心的问题。本文通过大量的数值模拟分析对边坡的动力响应规律进行研究，发现了高岩石边坡在水平动荷载下动力响应的加速度、速度、位移三量放大系数等值线在边坡剖面上分布的规律性特点。对于一定的岩土体材料，当边坡高度在一定时，边坡动力响应的加速度、速度、位移三量会随着边坡角度的增大而减小；当边坡的角度一定时，边坡动力响应的加速度、速度、位移三量会随着边坡高度的增加而放大；边坡的下覆岩层的材料特性对于边坡的动力响应的加速度、速度、位移三量的放大作用的影响具有一定的规律性；边坡动力响应的加速度、速度二量受动荷载的特征周期影响较位移明显，具有一定的规律性。边坡的边缘部位对振动的反应幅值较之内部存在放大现象，坡度决定了三量分布的等值线方向的走向。其结论性成果体现了高岩石边坡的地震动力响应特征，为高边坡工程提供理论基础和实践依据。
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| 关 键 词： | 边坡 动力响应 规律 动荷载 |
| 文章编号： | 1007-6069（2007）02-0131-08 |
| 修稿时间： | 2007-01-152007-04-23 |
General laws of dynamic responses of the high slopes under horizontal dynamic input |
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| QIU Ren-dong,SHI Yu-cheng,FU Chang-hua.General laws of dynamic responses of the high slopes under horizontal dynamic input[J].World Information On Earthquake Engineering,2007,23(2):131-138. |
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| Authors: | QIU Ren-dong SHI Yu-cheng FU Chang-hua |
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| Institution: | Lanzhou Institute of Seismology, Lanzhou Base of Institute of Earthquake Prediction, China Earthquake Administration, Lanzhou 730000, China |
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| Abstract: | Horizontal seismic excitation in high rock slope is a matter of most concerned in engineering practice. ed in this paper, and the general laws of the coefficient isoline for the acceleration, velocity and displacement of the slope section are obtained. Given a certain material slope, if the height of the slope is fixed, the acceleration, velocity and displacement linearly lessen with the slope angle enlarging; if the slope angle is fixed, the acceleration, veloci- ty and displacement increase with the slope height raising; the dynamic response laws of the acceleration, velocity and displacement are affected by the mechanical property of the underlying rock, besides the dynamic response laws of the acceleration, velocity are evidently affected by the period properties of the dynamic loads. At the same time, the rhythm of the slopes appears in the horizontal direction, and the acceleration, velocity and displacement of the slopes are enlarged near edge of the slopes, the distribution form of the coefficient isoline of acceleration , velocity and displacement in the slope section is remarkably affected by the slope angle. The results indicate the dynamic response characters of the high rock slopes, and provide theoretical basis and practical reference for the high rock slope engineering. |
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| Keywords: | slope dynamic response regularity dynamic load |
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