基于应变能的黄土初始屈服和强度特性试验研究

doi:10.13722/j.cnki.jrme.2017.0120

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摘要

不同应力路径条件下初始屈服和强度特性研究，是原状黄土加卸载准则建立的重要基础，基于应变能–应力矢量长度曲线的双线性化确定土单元初始屈服点方法的思想，利用西安理工大学真三轴仪和高压固结仪，对黄土进行了等p等b和侧限压缩应力路径试验，研究应变能确定黄土初始屈服特性的适用性和三维强度特性。从试验结果分析可知，2种应力路径下，应变能–应力矢量长度关系曲线均呈抛物线型，侧限应力条件下确定的结构屈服压力和对数比容–对数竖向应力曲线双线性化的方法接近；真三轴应力条件下黄土的应变能–应力矢量长度曲线中间段线性化程度不高，定义交叉点附近为土单元的屈服区域，不同b值下该区域呈带状分布。平面上黄土的破坏面为曲边三角形形状，破坏面用Lade准则来描述，随着b值的增加破坏状态时应变能逐渐增大。应变能的方法能够在完全侧限条件和侧限条件下研究黄土的初始屈服和强度特性。

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	陈菲1
	邵生俊1
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	邵帅1

关键词 ：土力学, 黄土, 初始屈服, 应变能, 应力路径, 破坏面

Abstract：

The researches about primary yield and failure properties are significant foundation to establish a loading-unloading criterion for the undisturbed loess under the different stress paths. Bilinear relations between strain energy and the length of stress vector are used for determination of yield point.A series of experiments，including equal p and equal b tests and confined compression tests are conducted by using true triaxial apparatus，developed by Xi¢an University of Technology independently，and high-pressure consolidation apparatus. Applicability of determining primary yield of loess by the strain energyand three strength properties are studied. From the results of experiments，the relationships between strain energy and the length of stress vector are all parabolic. Structural yield pressures determined on the confined situation is consistent with that of bilinear logarithmic relations between specific volume and vertical stress. There is no high degree of linearization in the middle section of curves between strain energy and the length of stress vector on the condition of three dimensional stresses. The yield zones near the intersecting rangement are defined and its distributions are stripped distribution with different b-values. The failure surfaces of loess on theplane are curved-edge-triangle，which is described by lade yield criterion. The method of strain energy is applicative to analyze the primary yield and strength under the condition the confined and unconfined stresses.

Key words： soil mechanics loess primary yield strain energy stress path failure surface

引用本文:

陈菲1，邵生俊1，2，邵帅1. 基于应变能的黄土初始屈服和强度特性试验研究[J]. 岩石力学与工程学报, 2017, 36(S2): 4151-4158.
CHEN Fei1，SHAO Shengjun1，2，SHAO Shuai1. Experimental study on primary yield and strength characteristics of loess based on strain energy. , 2017, 36(S2): 4151-4158.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2017.0120 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS2/4151

[1] 谢定义，姚仰平，党发宁. 高等土力学[M]. 北京：高等教育出版社，2008：106–107.(XIE Dingyi，YAO Yangping，DANG Faning. Advanced soil mechanics[M]. Beijing：Higher Education Press，2008：106–107.(in Chinese))

[2] 郑颖人，孔亮. 岩土弹塑性力学[M]. 北京：中国建筑工业出版社，2010：58–63.(ZHENG Yingren，KONG Liang. Geotechnical plastic mechanics[M]. Beijing：China Architecture and Building Press，2010：58–63.(in Chinese))

[3] JARDINE R J. Some observations on the kinematicnature of soil stiffness[J]. Soils and Foundations，1992，32(2)：111–124.

[4] BIAREZ J，HICHERPY. Elementary mechanics of soil behaviour，vol. 1. Saturated remolded soils[M]. Rotterdam：Balkema，1994：40–49.

[5] CROOKSJH A，GRAHAMJ. Geotechnical properties of the Belfast estuarine deposits[J]. Geotechnique，1976，26(2)：293–315.

[6] TAVENAS F，ROSIERS D，LEROUEIL J P，et al. The use of strain energy as a yield and creep criterion forover consolidated clays[J]. Geotechnique，1979，29(3)：285–303.

[7] LEWKV. Yielding criteria and limit state in a Winnipeg clay[Ph. D. Thesis][D]. Winnipeg，Man.：University of Manitoba，1981.

[8] GRAHAMJ，NOONANML，LEWKV. Yield states andstress-strain relationships in a natural plastic clay[J]. Canadian Geotechnical Journal，1983，20(3)，502–516.

[9] GRAHAMJ. The 2003 R.M. hardy lecture：soil parameters for numerical analysis in clay[J]. Canadian Geotechnical Journal，2006，43(2)：187–209.

[10] CUI Y J，DELAGE P. Yielding and plastic behavior of an unsaturated compacted silt[J]. Geotechnique，1996，46(2)：291–311.

[11] 陈正汉. 重塑非饱和黄土的变形、强度、屈服和水量变化特性[J].岩土工程学报，1999，21(1)：82–90.(CHEN Zhenghan. Deformation strength yield and moisture change of a remolded unsaturated loess[J]. Chinese Journal of Geotechnical Engineering，1999，21(1)：82–90.(in Chinese))

[12] ROTTA G V，CONSOLI N C，PRIETTO P D M，et al. Isotropic yielding in an artificially cemented soil cured under stress[J]. Géotechnique，2003，53(5)：493–501.

[13] XIAO H W，LEE F H，CHINB K G. Yielding of cement-treated marine clay[J]. Soils and Foundations，2014，54(3)：488–501.

[14] 周小文，刘攀，胡黎明，等. 结构性花岗岩残积土的剪切屈服特性试验研究[J]. 岩土力学，2015，36(增2)：157–163.(ZHOU Xiaowen，LIU Pan，HU Liming，et al. An experimental study of shear yield characteristics of structuredgranite residual soil[J]. Rock and Soil Mechanics，2015，36(Supp.2)：157–163.(in Chinese))

[15] 陈瑜瑶，王敬林，郑颖人. 由试验数据拟合重庆红黏土的屈服条件[J]. 岩土力学，2001，22(4)：443–446.(CHEN Yuyao，WANG Jinglin，ZHENG Yingren. Fitting the yield criterion of Chongqing red clay by experimental data[J]. Rock and Soil Mechanics，2001，22(4)：443–446.(in Chinese))

[16] CALLISTOL，CALABRESI G. Mechanical behavior of a naturalsoft clay[J]. Geotechnique，1998，48(4)：495–513.

[1] ALAWAJIH，ALAWIM，KOHY，et al. Experimental observations ofanisotropy in some stress-controlled tests on dry sand[C]// Yielding，Damage and Failure of Anisotropic SolidsMechanical Behaviour of a Natural Soft Clay 511. London：Mechanical Engineering Publications，1990：251–264.

[1] YONGR N，MCKYES E. Yield and failure of clay under triaxial stresses[J]. Journal of Soil Mechanics and Foundations Div.，1971，97(SM1)：159–176.

[2] PRASHANTA，PENUMADUD. Effect of intermediate principal stress on overconsolidated kaolin c]ay[J]. Journal of Geotechnical and Geoenvironmental Engineering，2004，130(3)：284–292.

[1] PRASHANTA，PENUMADU D. Effect of overconsolidation and anisotropy of kaolin clay using true triaxialtesting[J]. Soils and Foundations，2005，45(3)：71–78.

[2] MUKHERJEE M，GUPTA A，PRASHANT A. Drained instability analysis of sand under biaxial loading using a 3D material model[J]. Computers and Geotechnics，2016，79：130–145.

[1] 邵生俊，邓国华. 原状黄土的结构性强度特性及其在黄土隧道围岩压力分析中的应用[J]. 土木工程学报，2008，41(11)：93–98.(SHAO Shengjun，DENGGuohua.The strength characteristics of loess with different structuresand its application in analyzing the earth pressure on loess tunnel[J]. China Civil Engineering Journal，2008，41(11)：93–98.(in Chinese))

[2] 邵生俊，许萍，王强，等. 黄土各向异性强度特性的真三轴试验研究[J]. 岩土工程学报，2014，36(9)：1 614–1 623.(SHAO Shengjun，XU Ping，WANG Qiang，et al. True triaxial tests on anisotropic strength characteristics of loess[J]. Chinese Journal of Geotechnical Engineering，2014，36(9)：1 614–1 623.(in Chinese))

[1] 陈昌禄，邵生俊，罗爱忠，等. 结构性对原状黄土强度影响规律的真三轴试验研究[J]. 岩土工程学报，2013，35(12)：2 322–2 327. (CHEN Changlu，SHAOShengjun，LUO Aizhong，et al. True triaxialtests on structural effects on strength of intact loess[J]. Chinese Journal of Geotechnical Engineering，2013，35(12)：2 322–2 327.(in Chinese))

[1] 邵生俊，罗爱忠，邓国华，等. 一种新型真三轴仪的研制与开发[J].岩土工程学报，2009，31(8)：1 172–1 179.(SHAOShengjun，LUOAizhong，DENGGuohua，et al.Development of a new true triaxial apparatus[J]. Chinese Journal of Geotechnical Engineering，2009，31(8)：1 172–1 179.(in Chinese))

[1] SHAOS，WANGQ，LUOA，et al. True triaxial apparatus with rigid-flexible-flexible boundary and remolded loess testing[J]. Journal of Testing and Evaluation，2017，45(3)：1–10.

[1] BUTTERFIELD R. A natural compression law for soils(an advance on e-lgp′)[J]. Geotechnique，1979，29(4)：469–480.

[1] 殷杰. 土结构性对天然软黏土压缩特性的影响[J]. 岩土力学，2012，33(1)：48–52.(YINJie. Effect of soil structure on compression behavior of natural soft clays[J]. Rock and Soil Mechanics，2012，33(1)：48–52.(in Chinese))