【摘要】 把本质上属于亚弹性本构模型,在岩土工程界广为应用的Duncan-Chang模型与服从Drucker-PragerMohr-Column屈服准则的弹塑性本构模型相结合,推出了非线弹性-塑性的组合本构模型,以克服经典的弹塑性模型不能考虑岩土材料在塑性屈服前的非线性行为以及一般的Duncan-Chang模型不适用于应力水平接近于屈服或破坏状态等缺点。所建议的本构模型简单实用,能较好地综合利用工程地质勘察资料和常规的土工试验数据。针对实际边坡具体地层条件的分析表明,该模型及其非线性析算法的正确性和可行性,而且在岩土工程方面具有广泛的实际应用价值。更多还原

【Abstract】 A new kind of practical soil constitutive model by combining Duncan-Chang inelastic constitutive model with the elastoplastic model adapting Drucker-Prager failure has been derived in order to overcome the classical elastoplastic model’s inability to cover the nonlinear behavior of soil before plastic yielding and unsuitability of normal Duncan-Chang model to the stress state approaching yielding or failure.Finally,the numerical examples of practical problems have shown its feasibility and practicability.更多还原