Compression model for cohesionless soils
Compression model for cohesionless soils
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DOI：
10.1680/geot.1995.45.4.611
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发表时间：
1995-12
期刊：
影响因子：
5.8
通讯作者：
J. Pestana;A. Whittle
中科院分区：
文献类型：
--
作者：
J. Pestana;A. Whittle
一个简单的四参数弹塑性模型描述了新沉积的无粘性土在静水和一维压缩的非线性体积行为。它将切线体积模量表示为当前孔隙比和使用自然应变的平均有效应力的可分离函数。从不同的初始地层密度压缩试样接近一个独特的响应，在高应力水平的极限压缩曲线（LCC），这是线性的双对数孔隙比有效应力空间。该模型描述了不可恢复的，塑性应变的发展，在整个第一次加载和代表机制，从颗粒滑动和滚动在低应力破碎的LCC状态的变形的主要组成部分。描述塑性变形的三个输入参数可以很容易地从加载到高应力水平的流体静力学或一维压缩试验中估计;弹性体积模量需要在…
A simple four-parameter elasto-plastic model describes the non-linear volumetric behaviour of freshly deposited cohesionless soils in hydrostatic and one-dimensional compression. It expresses the tangent bulk modulus as a separable function of the current void ratio and mean effective stress using natural strains. Specimens compressed from different initial formation densities approach a unique response at high stress levels—the limiting compression curve (LCC)—which is linear in a double logarithmic void ratio-effective stress space. The model describes irrecoverable, plastic strains which develop throughout first loading and represent mechanisms ranging from particle sliding and rolling at low stresses to crushing—the principal component of deformation for LCC states. The three input parameters describing plastic deformation can be readily estimated from a hydrostatic or one-dimensional compression test loaded to high stress levels; the elastic bulk modulus requires accurate small strain measurements in...