[1]施建勇,雷国辉,宋雄伟,等.初始应力各向异性的边界面方程[J].东南大学学报(自然科学版),2004,34(3):379-381.[doi:10.3969/j.issn.1001-0505.2004.03.022]
 Shi Jianyong,Lei Guohui,Song Xiongwei,et al.Bounding surface equation of initial stress anisotropy[J].Journal of Southeast University (Natural Science Edition),2004,34(3):379-381.[doi:10.3969/j.issn.1001-0505.2004.03.022]
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初始应力各向异性的边界面方程()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第3期
页码:
379-381
栏目:
土木工程
出版日期:
2004-05-20

文章信息/Info

Title:
Bounding surface equation of initial stress anisotropy
作者:
施建勇 雷国辉 宋雄伟 艾英钵
河海大学岩土工程研究所, 南京 210098
Author(s):
Shi Jianyong Lei Guohui Song Xiongwei Ai Yingbo
Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
关键词:
初始应力 各向异性 边界面 权系数
Keywords:
initial stress anisotropy bounding surface weighted coefficient
分类号:
TU4
DOI:
10.3969/j.issn.1001-0505.2004.03.022
摘要:
由于初始应力状态的非对称性,土体的边界面形状不应该像剑桥模型那样是关于平均球应力轴对称的.根据土体受力后将发生剪切和压缩2部分组合变形的现象分别给出由摩擦引起和由体积压缩引起的塑性功,引入塑性功权系数C,以塑性能量平衡方程为基础,导出了初始应力状态非对称条件下的边界面方程.通过与试验结果的对比分析,得到土体受压时塑性功中摩擦为主和拉伸时体积塑性功为主的规律,并提出确定权系数的初步建议.
Abstract:
Since the initial stress state in a soil is non-symmetrical, the shape of the bounding surface of the soil is not symmetrical about the axis of the mean normal stress in p-q space, unlike that in the Cam-clay model. The plastic works induced respectively by the volumetric and deviatoric(frictional)deformations are defined in this paper. A weighted coefficient C is introduced to derive the bounding surface equation of the soil under non-symmetrical initial stress condition, based on the equilibrium equation of plastic energy. By comparing the calculated results with the experimental results, it has been found that friction and volumetric plastic work are the main theme in contraction and extension of the soil respectively. Suggestions for determining the weighted coefficient are also proposed.

参考文献/References:

[1] Smith P R,Jardine R J,Hight D W.The yielding of Bothkennar clay [J]. Geotechnique, 1992,42(2):257-274.
[2] Hight D W,Boese R,Butcher A P,et al.Disturbance of the Bothkennar clay prior to laboratory testing [J]. Geotechnique, 1992,42(2):199-217.
[3] Wong P K K,Mitchell R J.Yielding and plastic flow of sensitive cemented clay [J].Geotechnique, 1975,25(4):763-782.
[4] Atkinson J H,Richardson D,Robinson P J.Compression and extension of K00 normally consolidated kaolin clay [J]. Journal of Geotechnical Engineering, 1986,113(12):1468-1481.
[5] 孙德安,姚仰平,殷宗泽.初始应力各向异性土的弹塑性模型 [J].岩土力学,2000,21(3):222-226.
  Sun Dean,Yao Yangping,Yin Zongze.An elasto-plastic model for soil with initially stress-induced anisotropy [J]. Rock and Soil Mechanics, 2000,21(3):222-226.(in Chinese)
[6] 施建勇,赵维炳,Lee Fouk-hou,等.软粘土各向异性和小应变条件下的本构模型 [J].岩土力学,2000,21(3):209-212.
  Shi Jianyong,Zhao Weibing,Lee Fouk-hou,et al.A constitutive model for anisotropic and small-strain behaviour of soft clay [J]. Rock and Soil Mechanics,2000,21(3):209-212.(in Chinese)

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备注/Memo

备注/Memo:
作者简介: 施建勇(1964—),男,博士,教授,博士生导师,shijiany@public1.ptt.js.cn.
更新日期/Last Update: 2004-05-20