考虑损伤和流变的软土路基变形分析

Analysis of Deformation of Soft Ground Considering Damage and Creep

提出了一种考虑软土损伤和流变性质的粘弹-粘塑性损伤模型。结合堆载预压加固软基实例,分别采用殷宗泽双屈服面模型、粘弹-粘塑性和粘弹-粘塑性损伤模型进行有限元分析。结果表明,用粘弹-粘塑性损伤模型计算的结果与实测值比较接近,说明在工程分析中同时考虑软土流变和损伤是必要的。

A viscoelastic-viscoplastic-damage constitutive model considering damage and creep of soft soil is presented, Deformation of preloaded soft ground was calculated with the Yin＇s double yield surface model, the viscoelastic-viseoplastic model and the viscoelastic-viscoplastic damage model respectively, It＇s shown that the simulation results with viscoelastic-viscoplastic-damage model are closer to the in-situ measured data, so both damage and creep of soft soil must be considered in engineering analysis.