基于损伤理论的碾压混凝土坝层面影响带流变模型

摘要

For dealing with the issues of the mechanical gradient characteristics of RCC dam effecting zones and its significant impact on dam deformation, an anisotropic creep damage analytical model for compacted layer surfaces of RGC dam is set up after studying the deformation characteristics and rules of layer surface and based on the theory of damage mechanics. An engineering case study shows that the results of model calculation have a good agreement with the in—suit monitoring data, and verifies the model being reasonable and scientific. The proposed analytical method can also be applied to the deformation analysis of conventional concrete, especially the deformation analyses of faults and laminated rocks in dam foundation.%针对碾压混凝土坝层面影响带力学渐变特性及其对大坝变形显著影响的问题,基于损伤力学理论,深入研究了施工层面的变形特征及规律,建立了施工层面各向异性蠕变损伤分析模型.结合工程实例进行研究表明,所建模型计算结果与原位监测数据分析成果吻合较好,从而验证了该模型的合理性和科学性.提出的分析方法还可推广应用于常规混凝土,特别是坝基内断层和夹层岩体等变形分析.