基于静动力有限元的边坡抗震稳定分析方法

›› 2010, Vol. 31 ›› Issue (7): 2303-2308.

基于静动力有限元的边坡抗震稳定分析方法

周桂云 ^{1, 2}，李同春³

1.金陵科技学院建筑工程学院，南京 211169；2.中国人民解放军理工大学工程兵工程学院，南京 210007； 3.河海大学水利水电工程学院，南京 210098

收稿日期:2009-07-02 出版日期:2010-07-10 发布日期:2010-07-19
作者简介:周桂云，女，1980年生，博士，讲师，主要从事边坡稳定、滑坡涌浪分析方面研究。
基金资助:
中国博士后科学基金资助项目（No. 20080431343）；金陵科技学院科研基金资助项目（No. jit-n-2009-014，No. jit-b-200905）。

Slope aseismic stability analysis method based on static and dynamic finite elements

ZHOU Gui-yun¹, ², LI Tong-chun³

1. College of Civil Engineering and Architecture, Jinling Institute of Technology, Nanjing 211169, China; 2.Engineering Institute of Engineering Corps, PLA University of Science and Technology, Nanjing 210007, China; 3.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Received:2009-07-02 Online:2010-07-10 Published:2010-07-19

摘要/Abstract

摘要：

由人工截断边界输入地震波，通过时程积分法确定地震荷载作用下边坡的应力和变形，在人工截断边界上采用黏-弹性人工边界条件模拟地基辐射阻尼的影响。采用有限元强度折减法求解边坡稳定安全系数，以塑性区贯通时刻特征点的位移突变作为边坡失稳的评判标准。非线性有限元和黏-弹性人工边界条件结合运用，建立了基于静动力有限元的边坡抗震稳定分析方法。该方法在稳定安全系数的定义上和传统的刚体极限平衡法是一致的。以十里铺水电站为工程实例，分析了库区边坡的抗震稳定性，得出了边坡动力位移时程和动力稳定安全系数，计算结果合理评价了实际工程在地震荷载下的稳定性。

关键词: 地震, 静动力有限元, 边坡稳定, 黏-弹性人工边界, 有限元强度折减法, 安全系数, 十里铺水电站

Abstract:

The seismic wave is input through artificial truncated boundaries, and the stress and deformation of the slope induced by seismic loading are determined by time-integration method. The effect of foundation radiation damping is simulated by adopting viscoelastic artificial boundaries condition on artificial truncated boundaries. Safety factor of slope stability is solved by finite elements strength reduction method. The displacement saltation of feature points when the connection of plastic zone occurs is considered as an instability criterion of the slope. The slope aseismic stability analysis method based on static and dynamic finite elements is put forward through combining the dynamic finite element method with the viscoelastic artificial boundaries conditions. On the definition of safety factor, the method is consistent with the traditional grid limit equilibrium method. Finally, taking Shilipu Hydropower Station for example, the slope dynamic stability of the reservoir slope is analyzed; and the time history of the slope dynamic displacements and the safety factor of dynamic stability are obtained. The calculation results agree very well with geological survey and are close to the actual situation, so as to indicate that the method can be used to evaluate dynamic stability of the practical engineering.

Key words: seismic, static and dynamic finite element, slope stability, viscoelastic artificial boundaries, strength reduction dynamic finite element method, safety factor, Shilipu Hydropower Station

中图分类号:

TU 352

周桂云，李同春. 基于静动力有限元的边坡抗震稳定分析方法[J]. , 2010, 31(7): 2303-2308.

ZHOU Gui-yun, LI Tong-chun. Slope aseismic stability analysis method based on static and dynamic finite elements[J]. , 2010, 31(7): 2303-2308.

参考文献

相关文章 15

[1]	苏永华, 李诚诚. 强降雨下基于Green-Ampt模型的边坡稳定性分析[J]. 岩土力学, 2020, 41(2): 389-398.
[2]	刘红岩. 宏细观缺陷对岩体力学特性及边坡稳定影响研究[J]. 岩土力学, 2019, 40(S1): 431-439.
[3]	聂秀鹏, 逄焕平, 孙志彬, 谢松梅, 侯超群. 三维加筋边坡地震稳定性上限分析[J]. 岩土力学, 2019, 40(9): 3483-3492.
[4]	张海娜, 陈从新, 郑允, 孙朝燚, 张亚鹏, 刘秀敏, . 坡顶荷载作用下岩质边坡弯曲倾倒破坏分析[J]. 岩土力学, 2019, 40(8): 2938-2946.
[5]	刘新荣, 邓志云, 刘永权, 刘树林, 路雨明, . 地震作用下水平层状岩质边坡累积损伤与破坏模式研究[J]. 岩土力学, 2019, 40(7): 2507-2516.
[6]	韩俊艳, 钟紫蓝, 李立云, 赵密, 万宁潭, 杜修力. 纵向非一致激励下自由场土体的非线性地震反应研究[J]. 岩土力学, 2019, 40(7): 2581-2592.
[7]	何颖, 于琴, 刘中宪, . 考虑散射效应沉积河谷空间相关多点地震动模拟[J]. 岩土力学, 2019, 40(7): 2739-2747.
[8]	韩同春, 林博文, 何露, 苏钰钦, . 基于GIS与数值模拟软件耦合的三维边坡建模方法及其稳定性研究[J]. 岩土力学, 2019, 40(7): 2855-2865.
[9]	陈峥, 何平, 颜杜民, 高红杰, 聂奥祥, . 超前支护下隧道掌子面稳定性极限上限分析[J]. 岩土力学, 2019, 40(6): 2154-2162.
[10]	吴关叶, 郑惠峰, 徐建荣. 三维复杂块体系统边坡深层加固条件下稳定性及破坏机制模型试验研究[J]. 岩土力学, 2019, 40(6): 2369-2378.
[11]	徐鹏, 蒋关鲁, 雷涛, 刘琪, 王智猛, 刘勇, . 考虑填土强度的加筋土挡墙动位移计算[J]. 岩土力学, 2019, 40(5): 1841-1846.
[12]	刘汉香, 许强, 朱星, 周小棚, 刘文德. 含软弱夹层斜坡地震动力响应过程的边际谱特征研究[J]. 岩土力学, 2019, 40(4): 1387-1396.
[13]	余国, 谢谟文, 郑正勤, 覃事河, 杜岩, . 基于GIS的边坡稳定性计算方法研究[J]. 岩土力学, 2019, 40(4): 1397-1404.
[14]	雷文杰, 李金雨, 云美厚, . 采动微地震波传播与衰减特性研究[J]. 岩土力学, 2019, 40(4): 1491-1497.
[15]	邵生俊, 陈菲, 邓国华, . 基于平面应变统一强度公式的结构性黄土填料挡墙地震被动土压力研究[J]. 岩土力学, 2019, 40(4): 1255-1262.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed