An improved numerical manifold method for stability of heterogeneous gravity dams

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2025-03-09 DOI:10.1016/j.enganabound.2025.106202

Yujie Xu , Yuan Wang , Lingfeng Zhou , Qi Dong

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引用次数: 0

Abstract

In the study of the stability of gravity dam, the situation of dam and rock mass is complicated, there may be pore water and various kinds of heterogeneous materials to affect the stability of rock mass, among which the deformation and failure of the dam cannot be ignored. In this paper, an improved high-order covering function is applied to the Numerical Manifold Method (NMM), and the Hermite form weight function is used, which not only improves computational accuracy but also facilitates preprocessing. In elastoplastic analysis, a modified Mohr-Coulomb criterion is introduced, which can consider both tensile and shear failure, and consider the distribution of plastic zone more comprehensively. In addition, a comprehensive calculation method for safety factors considering regional damage is proposed. Based on the improved NMM, the gravity dam is simulated, and the physical response of two various actions of water to gravity dam is discussed. It is fully proved that the improved NMM can accurately calculate the hydraulic and mechanical field, and can effectively solve the discontinuity problem of some physical quantities. At the same time, considering the rationality of seepage volume force and the method of considering regional safety factor is of practical significance in engineering.

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非均质重力坝稳定性的改进数值流形法

在重力坝稳定性研究中，坝体与岩体的情况复杂，可能存在孔隙水和各种非均质物质影响岩体的稳定性，其中坝体的变形破坏是不可忽视的。本文将一种改进的高阶覆盖函数应用到数值流形法（NMM）中，并采用Hermite形式的权函数，既提高了计算精度，又便于预处理。在弹塑性分析中，引入了修正的Mohr-Coulomb准则，该准则可以同时考虑拉伸和剪切破坏，更全面地考虑塑性区分布。此外，提出了考虑区域损伤的安全系数综合计算方法。基于改进的NMM模型，对重力坝进行了数值模拟，讨论了水的两种不同作用对重力坝的物理响应。充分证明了改进的NMM能够准确地计算水力和力学场，并能有效地解决一些物理量的不连续问题。同时，考虑渗流体积力的合理性和考虑区域安全系数的方法在工程中具有实际意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.