论文部分内容阅读
为能更好地揭示复杂应力状态下饱和风积土变形过程的损伤本构关系,引入服从Weibull随机分布的饱和风积土微元强度统计损伤理论,基于饱和风积土常规三轴全应力—应变试验曲线,构建能够模拟特定围压环境下饱和风积土变形全过程的统计损伤硬化本构模型。通过拟合分析基于Weibull分布的饱和风积土统计损伤本构模型参数m、F0与围压σ3之间的关系,对其参数进行科学修正,从而构建出能够更客观地描述在复杂应力环境中的饱和风积土统计损伤硬化模型。理论与试验对比研究结果表明该模型具有一定的可靠性,不仅能客观地描述饱和风积土变形的全过程,更能真实地描述孔隙水压力对饱和风积土工程特性的影响。
In order to reveal the damage constitutive relations of saturated aeolian soil under complex stress conditions better, we introduce the statistical damage theory of micro-strength of saturated aeolian soil subject to Weibull random distribution. Based on the conventional triaxial total stress- Strain test curve to construct a statistical damage hardening constitutive model that can simulate the whole process of saturated aeolian deformation under a specific confining pressure. Through the fitting analysis of the relationship between the parameter m, F0 and the confining pressure σ3 of the saturated aeolian soil based on the Weibull distribution, the parameters of the saturated aeolian soil are scientifically modified, so as to construct a model that can more objectively describe the effect of stress in the complex stress environment Saturated Aeolian Soil Statistical Damage Hardening Model. The results of theoretical and experimental studies show that the model has certain reliability. It can not only objectively describe the whole process of saturated aeolian deformation but also describe the effect of pore water pressure on the engineering properties of saturated aeolian soil.