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从宏观和微观角度,在已有的膨胀性非饱和土的双尺度本构模型BExM和湿陷性非饱和土的毛细–弹塑性变形耦合模型的基础上,发展和建立了一个可预测膨胀性非饱和土的毛细滞回和力学行为耦合的双尺度本构模型。模型考虑了土体微观结构的体变及其对宏观结构行为的影响,以及毛细和力学行为之间的耦合作用。对已有的膨胀性非饱和土的常净应力下吸力循环试验进行预测,预测结果表明该模型能够定量地描述膨胀性非饱和土的毛细和力学行为。
From the macroscopic and microscopic perspectives, based on the coupled capillary-elasto-plastic deformation model of two-scale constitutive model BExM and collapsible unsaturated soil of existing unsaturated soils, a predictable expansibility TWO-SCALE CONSTITUTIVE MODEL COUPLED WITH WEAR HYSTERESIS AND MECHANICAL BEHAVIOR IN UNSATURATED SOIL. The model considers the volume change of soil microstructure and its influence on the macro-structure behavior, as well as the coupling between capillary and mechanical behavior. Prediction of the suction cycle test of the existing expansive unsaturated soils under normal net stress shows that the model can quantitatively describe the capillary and mechanical behaviors of expansive unsaturated soils.