岩土小应变问题研究进展

Development of Research on Small Strain Behavior of Geomaterials

岩土小应变情况下表现出许多与一般中大应变实验不同的特性。现场测试表明岩土工程中应变一般都比较小。因而近年来岩土小应变问题受到重视。本文对当前岩土小应变力学行为实验研究与本构模型研究进展进行了较为系统的描述。提出了合理描述岩土小应变力学特性需要进一步研究的几个问题。

Geomaterials exhibit many special characteristics in small strain stage which are different from those in middle or large strain stage. Field measurement showed that the strain in most of geotechnical engi neering regions belongs to small strain. In recent years intensive studies of many research groups have con centrated on the small strain behavior of geomaterials. Systematic introduction of the development of experi mental study and constitutive formulation of small strain behavior of geomaterials are presented in this paper. In order to improve the constitutive description of mechanical properties of small strain, several problems need to be studied further are suggested.