摘要
探讨了结构性土体的应力-应变关系,将土体应力-应变关系分为应变软化型和应变硬化型,并根据其力学性状将应力-应变关系分阶段讨论,其中硬化型应力-应变关系分为两个阶段,而软化型则分为三个阶段。同时,在邓肯—张模型的基础上,考虑了土的结构的损伤,引入损伤比的概念,对邓肯—张模型进行了修正。以几种土的试验结果为基础将本文模型及邓肯—张模型和软化模型进行了对比,结果表明本文模型能够更好地反映土的应力-应变关系。
The stress-strain behavior of soil is classified into harden type and soften type.The harden type may experience three stages and soften type has two stages.The non-linear elastic model proposed by Duncan and Chang is modified with the consideration of soil structural damage during loading and the concept of damage rate is introduced.The comparison of simulation results with test data for several kinds of soil shows that the proposed model can more precisely reflect the behavior of soil.
出处
《水利学报》
EI
CSCD
北大核心
2004年第1期83-89,共7页
Journal of Hydraulic Engineering
关键词
结构
损伤
非线性弹性模型
损伤比
structural damage of soil
non-linear elastic model
damage rate
