| 地震动作用下均匀土质边坡的临界转角分析 |
| |
| 引用本文： | 钱海涛,张力方,秦四清,王思敬.地震动作用下均匀土质边坡的临界转角分析[J].岩土力学,2013,34(Z2):62-66. |
| |
| 作者姓名： | 钱海涛 张力方 秦四清 王思敬 |
| |
| 作者单位： | 1. 中国地震局 地壳应力研究所，北京 100085；2. 中国科学院 地质与地球物理研究所，北京 100029 |
| |
| 基金项目： | 中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(No.ZDJ2012-17)；国家自然科学基金青年基金（No.41202218）。 |
| |
| 摘 要： | 均质土坡变形的整体旋转角度（即转角）与其弧形滑动特征相协调，是比永久位移更为优越的土坡变形与稳定性表征量。地震动瞬态弹性变形应变能相当于土坡系统势能的动态随机性“涨落”，临界点（临界转角）作为系统本身的一个固有特性，不受地震动随机性“涨落”的影响，土坡滑动失稳的临界转角实质上对应着系统势能的突变点。基于均质土坡地震动失稳的特点，结合突变理论，给出了确定失稳临界转角的计算公式，发现其仅与滑带介质本构模型参数 、 和滑弧半径R有关，但在本质上体现了诸因素的影响而具有广泛适用性。
|
| 关 键 词： | 边坡工程 地震动 均匀土质边坡 临界转角 突变 |
| 收稿时间： | 2013-06-23 |
Analysis of critical rotation angle of homogeneous soil slopes instability aroused by seismic action |
| |
| QIAN Hai-tao,ZHANG Li-fang,QIN Si-qing,WANG Si-jing.Analysis of critical rotation angle of homogeneous soil slopes instability aroused by seismic action[J].Rock and Soil Mechanics,2013,34(Z2):62-66. |
| |
| Authors: | QIAN Hai-tao ZHANG Li-fang QIN Si-qing WANG Si-jing |
| |
| Institution: | 1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
| |
| Abstract: | The global rotation angle of a homogeneous soil slope induced by seism is well harmonize with the arc-sliding behavior of slope failure and so is a more superior parameter of deformation and stability than the permanent sliding displacement. And the strain energy because of transient seismic deformations is reversible and equivalent to the random fluctuation to a slope system, and critical rotation angle is an inherent property of slopes and independent of the seismic oscillation. Substantially, the critical rotation angle is in essence corresponds to the catastrophe point of the system potential energy. A cusp catastrophe model is set up based on the characters of seismic instability of homogeneous soil slope; and a method for determining the critical rotation angle of arc-sliding is proposed; and it is found that the critical rotation angle is only related to the constitutive model parameter m and of the constitutive model of soil in slide belt and the radius R of the arc slide belt and in essence represents the effect of many factors and deserving wide application. |
| |
| Keywords: | slope engineering seism homogeneous soil slope critical rotation angle catastrophe |
|
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
