含主应力轴旋转的土体本构关系研究进展

RESEARCH DEVELOPMENT OF SOILS CONSTITUTIVE RELATION INVOLVING PRINCIPAL STRESS AXES ROTATION

主应力轴旋转对岩土工程的影响日益受到人们的重视．本文从纯主应力轴旋转、纯应力洛德角变化、多种因素变化、排水与不排水等方面较全面地描述了含主应力轴旋转情况下土体的基本变形特性．对当前较有影响的含主应力轴旋转的土体本构模型（基于一般应力空间的土体本构模型、运动硬化模型、边界面模型、土体弹塑性应力应变关系的完全应力增量表述等等）进行了较为系统的评述．提出了合主应力轴旋转的实验研究中存在的核心问题与建立合主应力轴旋转的土体本构关系的根本途径．

The influences of principal stress axes rotation.on geotechnical engineering attract more and more attention. In this paper, the basic deformation characteristics of soils involving pure principal stress axes rotation, pure variation of stress Lode angle, multiple-factor variation, drained and undrained, are discussed. The influential soil constitutive models involving principal stress axes rotation, such as Matsuoka's model, kinematic hardening model, bounding surface model and the complete stress increment formulation of soils elasto-elastic stress strain relation, etc, are reviewed. In the end, the hey problems in the experimental study of principal stres axes rotation and how to establish soils constitutive relation involving principal axes rotation are put forward.