软土的弹塑性损伤模型在Biot固结有限元中应用

Application of elastoplastic damage model of soft soils to Biot's consolidation theory

在Biot固结理论基础上,引入弹塑性损伤本构关系,建立了固结分析有限元方程。对某试验路堤进行了损伤模型计算与弹塑性模型计算的结果比较。结果表明:损伤模型的计算结果大于弹塑性模型的计算结果;损伤随着加荷时间的增长而增大;路基中心线和路基坡脚下的土损伤程度较大。

Based on Biot's consolidation theory, the elastoplastic damage model is applied, and the consolidation equation of finite element analysis is established. The damage model and Ohta-Sekiguchi's elastoplastic model are used in a trial embankment and the computation results of damage model are bigger than that of elastoplastic model. Along with the time's prolonging of loading, the damage is increasing. Under the centre and toe of the embankment, damage becomes serious. Under the centre of the embankment, vertical damage values are bigger than that of horizontal ones. Under the toe of the embankment, horizontal damage values are bigger than that of vertical ones.