沥青混凝土是一种典型的流变材料,其应力-应变特性取决于沥青品种、材料配合比、应力水平、应变速率、温度和时间因数,性质极为复杂。过去国内外均借用土工成果,用邓肯-张(Duncan-Chang)模型来描述。本文研究表明:沥青混凝土的应力-应变关系并不完全符合双曲线模型,其破坏准则不遵守摩尔-库仑(Mohr-Coulomb)准则。做为本阶段研究,考虑到邓肯-张模型在土石坝弹性非线性分析中广为应用,故仍以 Asphalt concrete is a typical rheological material whose stress-strain properties depend on the asphalt type, material mix ratio, stress level, strain rate, temperature, and time factor, and its properties are extremely complex. In the past, the results of geotechnical work were borrowed both at home and abroad and described using the Duncan-Chang model. The research in this paper shows that the stress-strain relationship of asphalt concrete does not fully conform to the hyperbolic model, and its failure criterion does not obey the Mohr-Coulomb criterion. As this phase of the study, taking into account the use of the Duncan-Chang model in the elastic nonlinear analysis of earth-rock dams,