100m级高面板堆石坝应力变形分析

摘要

采用邓肯张E－B非线性弹性模型，利用自动剖分程序建立三维模型，对某100 m级高面板堆石坝进行三维有限元数值模拟计算，并选取合适的反映堆石料流变特性的本构模型分析了坝体的应力变形情况。结果表明：坝体的位移和应力分布规律基本合理，数值大小都在允许的范围内，但在堆石流变作用的影响下，坝体的应力变形明显增大，流变作用对坝体的影响不可忽略，本文为坝体的设计和施工提供支撑。%In order to study the influence of material properties on dam stress and deformation ,this paper established three‐di‐mensional solid models by applying Duncan‐Chang Model nonlinear elastic model with automatic mesh program ,the three‐di‐mensional finite element of a 100m high CFRD was numerically simulated ,and appropriate constitutive model that could reflect the rheological characteristics of materials was adopted to analyze the stress and deformation of the dam body .The result shows that dam displacement and distribution of stress is basically reasonable ,the numerical values are in a permitted range .But the stress and deformation of dam increases significantly under the influence of rheological effect ,which can't be neglected .This paper can be used as a reference for dam body design and construction .