剪胀性

分析了c、φ的异步发挥，土的剪胀性，土单元主应力方向旋转，孔隙水压力以及损伤软化对侧阻发挥的影响。

It analyses the influence of , dilatancy , rotation of soil cell 's principal stress , pore water pressure and the damage softening .

结果表明，该模型能够较好地模拟Q1黄土的软化和剪胀性。

The results indicate that the model can stimulate the softening and dilatancy behaviors of Q_1 loess .

考虑材料剪胀性的球形空腔扩张问题的弹塑性分析

Elasto-plastic analysis of spherical cavity expansion with consideration of material dilatancy

考虑剪胀性与状态相关的钙质砂双屈服面模型研究

Study on a Two-Yield surface model with consideration of state-dependent dilatancy for calcareous sand

土的密度越大，有效平均正应力越低，土的剪胀性就越大。

The larger the density , the lower the effective mean normal stress , the more dilative response is .

对于初始应力状态相同的砂样，砂土的强度和剪胀性随试样密度的增大而增大；

Both the strength and dilatancy of sand increase with the density under the same initial effective mean normal stress .

土体具有复杂的应力应变特性，如剪胀性、各向异性、受应力路径和应力历史影响的特性等。

The soil has a complex stress-strain characteristic , such as dilatancy , anisotropy , the stress path and stress history characteristics .

本文认为土体的剪胀性是偏应力的二次幂效应。

In this paper , it was proposed the dilatancy occurred in soil mass is a second power effect of applied deviator stress .

巨粒土在常应力水平下就容易产生较高颗粒破碎率，颗粒破碎将对材料的剪胀性和抗剪强度产生影响。

High grain breakage appears easily under common pressure . It affects the dilatancy and the shear strength of over coarse-grained soil greatly .

程序中嵌入了基于与状态相关的剪胀性的临界状态砂土模型。

A newly developed critical state sand model , which is formulated based on the concept of state-dependent dilatancy is incorporated in the procedure .

模型对传统修正剑桥模型中的剪胀性公式进行了改进，考虑了状态转换应力比与初始有效围压的相关性。

The traditional dilatancy equation of Cam-clay model was modified and the relativity between the phase transformation stress ratio and initial effective pressure was considered .

通过分析现有的砂土临界状态本构模型所存在的缺陷，本文基于临界状态理论和材料状态相关剪胀性理论，建立了一个适用于不同初始密实度的双硬化砂土本构模型。

To establish a double-hardening constitutive model which is suitable for different initial density sands , based on the critical state and state-dependent dilatancy theories .

岩土介质的力学特性是复杂的，具有压硬性，剪胀性，和应力路径相关性等。

The mechnical characteristics of geological medium are very complex , that include the effect of confining pressure , dilatancy and the dependency of stress path .

通过与三轴试验结果比较，模型能较好地描述钙质砂的强度和剪胀性。

By making comparisons of predictions with triaxial test , it is demonstrated that the model provides satisfactory simulation of strength and dilatancy of calcareous sand .

本文采用完全耦合有效应力分析程序和与状态相关的剪胀性砂土模型模拟斜坡因地下水位变化而发生的变形。

The deformation of slope caused by change of ground water level was investigated by adopting a fully coupled procedure and the state-dependent dilatant sand model .

同时，剪胀性是土最为重要的基本力学特性之一，研究循环荷载作用下土的体变发展规律对建立应力&剪胀方程具有重要的理论与实际意义。

To clarity effect of volumetric change behavior of soils induced by cyclic loading on stress-dilatancy equation is meaningful not only theoretically , but also practically .

实验研究表明低围压下松砂的剪胀性非常明显，且存在剪应力极值；

It is demonstrated that the dilatancy behavior of loose sand under low cell pressure is obvious and there exists a maximum shear stress for loose sand ;

卸载状态下冻土三轴蠕变试验结果表明，冻土具有明显的剪胀性，且体积应变不能忽略。

The results of triaxial creep experiments for unloading state show that the frozen soil has an obvious dilatancy , and its volume strain should not be neglected .

干密度越大，主应力差峰值越大，表现出较大的剪胀性，孔隙水压力易出现负孔隙水压力；

The more is principal stress deviator peak , the more possible is to emerge negative pore water pressure and to show more shear dilatation with high dry density .

粗粒土在高应力水平下容易发生颗粒破碎，颗粒破碎直接改变土体结构，对土体的峰值强度、内摩擦角、剪胀性、渗透系数等工程特性均产生影响。

The coarse granular soil is susceptible to particle breakage in high compressive strength , which modifies its structure directly , influencing its dilatancy , friction angle , strength and permeability .

岩土材料的力学特性很复杂，具有非线性、剪胀性、各向异性等特点，同时应力状态和应力路径都影响其本构关系。

Mechanical properties of geotechnical materials are complex , being nonlinear , dilation rate , and anisotropy etc. Simultaneously , their constitutive model could be influenced by stress state and stress path .

结果表明，在不考虑土的剪胀性条件下，单桩的沉降主要是瞬时沉降，土体固结的影响很小，桩顶荷载主要以剪应力形式传递到桩侧土体中。

The major part of the final settlement of a single pile is immediate settlement , and occurs on application of the load because the load is transferred to the soil essentially by shear .

结果表明，开挖增大了土的剪胀性，在加载过程中增大了桩的法向应力，提高了接触面剪切强度，从而使粗糙桩承载力和刚度提高。

It is found that the excavation enhance the dilation of the soil . This leads to an increase of normal stress and shear strength of the interface . Therefore , the capacity and stiffness of rough pile is increased .

剑桥模型以传统弹塑性理论为基础，具有简单实用的特点，但是剑桥模型不能恰当的描述剪胀性材料由剪缩到剪胀的临界点的变形特性。

Cambridge model is based on the theory of traditional plastic , with simple and practical features , but the Cambridge model can not properly describe the material by the shear dilatancy dilatancy reduced to the critical point of the deformation characteristics .

本文中用数值建模方法建立的砂土弹塑性本构模型，较准确的反映了压硬性，剪胀性和应力路径相关性。

In this paper , the elastoplastic constitutive model of sand is built up through the numerical method of modeling of the constitutive law for rock and soil . It reflects the effects of confining pressure , dilatancy and dependency of stress path .

采用有限元强度折减的基本原理，给出了地基承载力确定的数值模拟方法，并讨论了剪胀性材料的地基承载力与材料剪胀角的变化关系。

The numerical simulation method for the ultimate bearing capacity of ground is presented by adopting the theory of finite element strength reduction ; and the significance in bearing capacity of the ground of the dilatancy angle of the material for the ground is discussed .

本文采用考虑剪胀性的双曲线模式和剑桥模式对正在修建的鲁布革电站风化料心墙堆石坝进行有效应力应变分析。

Two different stress-strain models , a new developed hyperbolic model and the Cambridge model , have been used to analyze the performance of a rockfill dam with core of weathered rock and red clay in the various stages of construction , water impounding and drawdown .

模型可反映土的主要变形特性。如，应力-应变曲线的非线性、压硬性、剪胀性、中主应力对强度和变形的影响等。

This model can reflect the general stress-strain behavior of sands including the non-linear stress-strain relationship , hardening behavior , positive / negative dilatancy , influence of intermediate principal stress on the deformation and strength , and the plastic strain coupled with hydrostatic and shear stress .

土的变形非线性与剪缩剪胀性新认识

New consideration on nonlinear and dilatancy deformation characteristics of soils

粗粒土具有明显的剪胀剪缩性，为非虎克材料。

Coarse-grained soils exhibit evident dilatancy , and they do not obey the Hook 's law .