| 岩质边坡在地震荷载作用下的动力响应分析 |
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| 引用本文： | 李书兵,苏骏,毕辉. 岩质边坡在地震荷载作用下的动力响应分析[J]. 地下空间与工程学报, 2012, 8(1): 212-216 |
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| 作者姓名： | 李书兵 苏骏 毕辉 |
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| 作者单位： | 1.中铁十一局集团有限公司,武汉 430064; 2.湖北工业大学土木工程与建筑学院,武汉 430068 |
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| 摘 要： | 在动力有限元理论的基础上,运用ANSYS软件对石家庄至武汉铁路客运专线岩质边坡进行地震荷载作用下的动力响应分析。获得了位移、加速度和锚杆(索)轴向力放大系数及其变化规律,结果表明:边坡对地震加速度存在放大作用,坡顶水平向峰值加速度为5.13 m·s-2,约为输入地震峰值加速度的1.6倍,锚杆(索)框架梁支护能有效地提高岩质边坡的动力稳定性,具有良好的抗震效果。研究结果对岩质边坡的抗震设计具有一定的借鉴意义。
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| 关 键 词： | 岩质边坡 动力响应 地震 锚杆(索) 边坡稳定性 |
| 收稿时间： | 2011-12-10 |
Dynamical Response Analysis of Rock Slopes under Earthquake Load |
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| Li Shubing , Su Jun , Bi Hui. Dynamical Response Analysis of Rock Slopes under Earthquake Load[J]. Chinese Journal of Underground Space and Engineering, 2012, 8(1): 212-216 |
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| Authors: | Li Shubing Su Jun Bi Hui |
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| Affiliation: | 1.The 11th China Railway Bureau Group Co. Ltd, Wuhan 430064, China; 2. Department of Civil Engineering of Hubei University of Technology, Wuhan 430068, China |
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| Abstract: | On the basis of dynamic finite element theory,the rock slopes of Shijiazhuang-Wuhan high-speed railway are computed on dynamic response under earthquake load by ANSYS software.The amplification coefficient and change rules of displacement,acceleration of slope response and the axial force of rock bolt(anchor cable)frame beam are obtained.It is shown that the slope has an amplification effect on earthquake acceleration.The horizontal peak acceleration in the slope roof is 5.13 m.s-2and approximately 1.6 times of the input earthquake peak acceleration.The action of bolting(anchor cable)frame beam can enhance the stability of rock slope.The results would have a great reference value to aseismic design of rock slopes. |
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| Keywords: | rock slope dynamical response earthquake rock bolt(anchor cable) slope stability |
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