动荷载作用下阜新风积土结构性参数试验研究

张向东; 刘家顺; 张哲诚

doi:10.13204/j.gyjz201308018

动荷载作用下阜新风积土结构性参数试验研究

doi: 10.13204/j.gyjz201308018

1.
辽宁工程技术大学土木与交通学院,辽宁阜新123000

基金项目:

国家自然科学基金项目(50978131);辽宁省高等学校优秀人才支持计划项目(2008RC23)

详细信息

作者简介:
第一作者：张向东, 男, 1962年出生, 博士, 教授, 博士生导师。电子信箱：zhxd2008@yahoo.com.cn

中图分类号: TU411
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- 文章访问数: 113
- HTML全文浏览量: 6
- PDF下载量: 93
- 被引次数: 0
出版历程
- 收稿日期: 2013-02-13
- 刊出日期: 2013-08-20

EXPERIMENTAL STUDY ON STRUCTURAL PARAMETERS OF FUXIN AEOLIAN SOIL UNDER DYNAMIC LOADS

1.
Institute of Civil Engineering and Transportation,Liaoning Technical University,Fuxin 123000,China

摘要

摘要: 通过一系列动三轴试验，获得不同动应力幅值、围压和含水率条件下阜新风积土轴向累积应变与振动次数的关系曲线。基于土结构性研究成果，定义风积土联结结构动应变势参数mN1、摩擦结构动应变势参数mN2和风积土总结构动应变势参数mN，探讨饱和重塑风积土发生结构破坏时，上述各结构性参数指标与试验条件间的关系。研究结果表明：mN1随振动次数的增加而减小，mN2和mN随振动次数增加而增大，且振动次数较少时各结构性参数指标变化较快，说明振动初始阶段风积土结构性损伤较为剧烈。动应力幅值和含水率越大，围压越小，风积土联结结构稳定动应变势mfN1、摩擦结构稳定动应变势mfN2和总结构稳定动应变势mfN越大。依据破坏振次与风积土总结构动应变势间的关系，建立了确定饱和重塑风积土动强度的新方法。
- 风积土 /
- 结构性 /
- 联结结构动应变势参数 /
- 摩擦结构动应变势参数 /
- 总结构动应变势参数 /
- 动强度
Abstract: The cumulated axial strain and vibration number curves were obtained through a series of dynamic triaxial tests under different dynamic stress amplitudes, confining pressures and moisture contents.The dynamic strain of link structural potential parameter(mN1), dynamic strain of friction structural potential parameter(mN2), total dynamic strain structural potential parameter(mN) were defined according to the soil structural research results and theories.The relationships among the structural parameters and tests conditions were discussed when the structural strength of aeolian soil's was destroyed.The research results showed that mN1 decreased with vibration numbers increasing, but the mN2 and mN would increased with the vibration numbers increasing.All kinds of structural parameters changed rapidly when vibration numbers were few, which showed that structural damages of aeolian soil were severe at primary vibration step.The larger dynamic stress amplitudes and moisture contents were, the larger the link stable structural dynamic strain potential parameter mfN1, the friction stable structural dynamic strain potential parameter mfN2were, and the total stable dynamic strain structural potential parameter mfN but opposite to confining pressures.The new method to determine the dynamic strength of aeolian soil was established based on the relationship between the total dynamic strain structural potential parameters and vibration numbers.

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参考文献(25)

[2] FakhaRian K, Evgin E. Elasto-Plastic Modeling of StRess- PathDependent BehavioR of InteRfaces[J].InteRnational JouRnal of?NumeRical Analytical Methods in Geomechanics,2000,24:183－199.

沈珠江.土体结构性的数学模型21世纪土力学的核心问题[J].岩土工程学报,1996,18(1):95－97.

[3] Callisto L,Rampeno S. SheaR StRength and Small-StRain Stiffness?of a NatuRal Clay UndeR GeneRal StRess Conditions [J].Geotechnique,2002,52(81):547－560.

[4] Hoeg K, Dyvik R, Sandabekken G. StRength of UndistuRbed?VeRsus Reconstituted Silt and Silty Sand Specimens[J].JouRnal of?Geotechnical and GeoenviRonmental EngineeRing,2000,126(7):606－617.

[5] 谢定义,齐吉琳,张振中.考虑土结构性的本构关系[J].土木工程学报,2000,33(4):35－41.

[6] 骆亚生,谢定义,邵生俊,等.复杂应力状态下的土结构性参数[J].岩石力学与工程学报,2004,23(24):4248－4251.

[7] 田堪良,马俊,李永红.黄土结构性定量化参数的探讨[J].岩石力学与工程学报,2011,31(增1):3179－3184.

[8] 刘恩龙,沈珠江.不同应力路径下结构性土的力学特性[J].岩石力学与工程学报,2006,25(10):2058－2064.

[9] 邓国华,邵生俊,佘芳涛.结构性黄土的修正剑桥模型[J].岩土工程学报,2012,34(5):834－841.

[10] 邓国华.真三轴条件下黄土的结构性参数及结构性本构关系研究[D].西安:西安理工大学,2009.

[11] Hong Z S, Song Y, Liu S L, et al. CompaRison in UndRained SheaR StRength Between UndistuRbed and Remodeled ARiake Clays[J].JouRnal of Geotechnical and GeoenviRonmental EngineeRing,?ASCE,2006,132(2):272－275.

[12] 陈颖平,黄博,陈云敏.循环荷载作用下结构性软黏土的变形和强度特性[J].岩土工程学报,2005,27(9):1065－1072.

[13] 杨超,崔玉军,黄茂松,等.循环荷载下非饱和结构性黄土的损伤模型[J].岩石力学与工程学报,2008,27(4):805－811.

[14] 黄茂松,杨超,崔玉军.循环荷载下非饱和结构性土的边界面模型[J].岩土工程学报,2009,31(6):817－824.

[15] 丁伯阳,张勇.杭州第四系软土动力特性试验与土结构性影响的探讨[J].岩土力学,2012,33(2):336－342.

[16] Kavvadas M, AmoRosi A. Constitutive Model foR StRuctuRed Soils [J].Geotechnique,2000,50(3):263－273.

[17] Liu M D, CaRteR J P. A StRuctuRed Cam-Clay Model[J].Canadian?Geotechnical JouRnal,2002,39(81):1313－1332.

[18] 骆亚生.非饱和黄土在动、静复杂应力条件下的结构变化特性及结构性本构关系研究[D].西安:西安理工大学,2003.

[19] 于小军,齐志宏.基于扰动状态概念的结构性软黏土本构模型[J].岩土工程学报,2009,31(12):1882－1887.

[20] 曾玲玲,刘松玉,洪振舜.考虑土结构性影响的改进 EVP 压缩模型[J].东南大学学报:自然科学版,2012,42(2):346－351.

[21] 张向东,刘功勋,于崇,等.辽西地区风积土结构特性试验研究[J].岩土力学,2008,29(3):691－695.

[22] 刘浜葭.冻融和渗流耦合作用下风积土路基结构性演变规律的研究[D].阜新:辽宁工程技术大学,2009.

[23] JTGE 40－2007公路土工试验规程[S].

[24] Monismith C L, Ogawa N, FRume C R. PeRmanent DefoRmation?ChaRacteRistics of SubgRade Soils due to Repeated Loading[R].TRanspoRtation ReseaRch RecoRd No.537, TRanspoRtation ReseaRch?BoaRd. Washington, DC: National ReseaRch Council,1975:1－17.

[25] 谢定义.土动力学[M].西安:西安交通大学出版社,1988.

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