[1] Itoya Emioshor, Zhao Yin, Martins Y. Otache,. Stability analysis of a concrete gravity dam and its foundation [J]. Journal of Southeast University (English Edition), 2004, 20 (4): 508-512. [doi:10.3969/j.issn.1003-7985.2004.04.023]

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Stability analysis of a concrete gravity dam and its foundation()

大坝与坝基稳定性分析研究

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

20

Issue:

2004 4

Page:

508-512

Research Field:

Other Disciplines

Publishing date:

2004-12-30

Info

Title:

Stability analysis of a concrete gravity dam and its foundation

大坝与坝基稳定性分析研究

Author(s):

Itoya Emioshor¹;  Zhao Yin¹;  Martins Y. Otache²

¹College of Civil Engineering, Hohai University, Nanjing 210098, China
²College of Water Resources and Environment, Hohai University, Nanjing 210098, China

Itoya Emioshor¹;  赵引¹;  Martins Y. Otache²

¹河海大学土木工程学院, 南京 210098; ²河海大学水资源环境学院, 南京 210098

Keywords:

stability;  gravity dam;  safety factor;  rigid limit equilibrium theory;  elasto-plastic theory;  nonlinear finite element method

稳定性;  重力坝;  安全因数;  刚体极限平衡原理;  弹塑性理论;  非线性有限元方法

PACS:

TV642

DOI:

10.3969/j.issn.1003-7985.2004.04.023

Abstract:

The stability of dams and their foundations is an important problem to which dam engineers have paid close attention over the years. This paper presents two methods to analyze the stability of a gravity dam and its foundation. The direct analysis method is based on a rigid limit equilibrium method which regards both dam and the rock foundation as undeformable rigid bodies. In this method, the safety factor of potential sliding surfaces was computed directly. The second method, the indirect analysis method, is based on elasto-plastic theory and employs nonlinear finite element method(FEM)in the analysis of stresses and deformation in the dam and its foundation. The determination of the safety degree of the structure was based on the convergence and abrupt the change criterion. The results obtained show that structures’ constituent material behavior plays an active role in the failure of engineered structures in addition to the imposed load.

大坝与坝基的稳定一直是工程师密切关注的一个安全问题. 论文提出2种分析重力坝和坝基稳定的方法: 一种是基于刚体极限平衡原理的直接分析方法, 它将坝体和岩基作为不变形的刚体, 利用该方法可直接计算出可能滑动面的安全因数; 另一种是基于弹塑性理论的间接分析方法, 它采用非线性有限元方法分析大坝和坝基的应力和变形. 根据收敛和突变准则来确定稳定安全度.结果表明:工程建筑物的破坏不仅仅是由于施加荷载的原因, 同时也与组成材料的性质有关.

References:

[1] Du Chengbin, Ren Qingwen. Nonlinear finite element analysis of dam with perimentral joints [A]. In: Proc of Computational Mechanics[C]. Philippines, 2000, 1: 346.
[2] Dawson E M, Roth W H, Drescger A. Slope stability analysis by strength reduction [J]. Journal Geotechnical, 1999, 49(6): 835-840.
[3] Du C B, Qiu Y. Analysis of failure of Meihua arch dam [A]. In: Proc of the 3rd International Conference on Dam Engineering [C]. Singapore, 2002. 89-96.
[4] Zienkiewicz O C, Valliappan S, King I P. Elasto-plastic solution of engineering problems initial stress, finite element approach, international [J]. Journal for Numerical Methods in Engineering, 1969, 1: 75-100.
[5] Owen D R J, Hinton E. Finite elements in plasticity theory and practice [M]. London: London University Press, 1980. 213-236.

Memo

Memo:

Biographies: Itoya Emioshor(1973—), male, graduate, Nigerian, emioshor@yahoo.com; Zhao Yin(corresponding author), female, associate professor, zhaoyin01@163.com.

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