土结构性本构模型研究综述

Review of soil structural constitutive models

合理的本构模型对于揭示天然土体的强度和变形有着极其重要的作用。然而,以修正剑桥模型为代表的常规弹塑性模型大多是建立在重塑土的基础之上,不能反映土的结构性,使得计算结果与实测结果存在较大差异。鉴于此种情况,目前诸多学者基于各种理论和方法,建立了考虑结构性的本构模型。本文简要介绍了近10年来提出的土结构性模型的研究现状,并对其进行分类评述,指出这些模型在应用中存在的问题。最后,针对土结构性模型的发展趋势提出几点建议。

Reasonable constitutive model plays an important role in revealing the strength and deformation of natural soil. However,the conventional elastoplastic model represented by modified Cam-clay model is mostly based on the remolded soil cannot reflect the structure of the soil,which makes the calculated results differ greatly from the measured results. In view of this situation,many scholars have established constitutive model considering structure based on various theories and methods. In this paper,the present research status of soil structural models proposed in recent 10 years is briefly introduced,and its classification is reviewed,and the problems in application are pointed out. Finally,some suggestions on the development trend of soil structural model are put forward.