基于能量法的尾粉土累积应变增长方式研究

莫海鸿; 单毅; 李慧子; 刘叔灼; 陈俊生

doi:10.11779/CJGE201711002

基于能量法的尾粉土累积应变增长方式研究 English Version

莫海鸿^1,2,
单毅^1,2,
李慧子^1,2,3,
刘叔灼^1,2,
陈俊生^1,2, ,

1. 华南理工大学土木与交通学院,广东广州510641;
2. 华南理工大学亚热带建筑科学国家重点实验室,广东广州 510641;
3. 广东省重工建筑设计院有限公司,广东广州 510040

基金项目: 亚热带建筑科学国家重点实验室自主研究课题项目

详细信息

作者简介:
莫海鸿(1955-),男,博士,教授,博士生导师,主要从事岩土工程和地下结构方面的教学与科研工作。E-mail:cvhhmo@scut.edu.cn。

通讯作者:
陈俊生，E-mail：jschen@scut.edu.cn

中图分类号: TU431
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出版历程
- 收稿日期: 2016-07-31
- 发布日期: 2017-11-24

Energy-based method for analyzing accumulative plastic strain growth of tailing silt

MO Hai-hong^1,2,
SHAN Yi^1,2,
LI Hui-zi^1,2,3,
LIU Shu-zhuo^1,2,
CHEN Jun-sheng^1,2, ,

1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;
2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China;
3. Guangdong Zhonggong Architectural Design Co., Ltd., Guangzhou 510040, China

摘要

摘要: 为了研究累积塑性应变增长方式与能量耗散的关系,从机理方面进一步细化累积塑性应变增长方式。基于饱和尾粉土在3种孔隙比条件下不同循环应力比的固结不排水循环剪切试验,改进传统能量耗散计算方法,依据塑性应变累积能量耗散与黏滞累积能量耗散的关系对累积塑性应变增长方式进行了重新分类,并从能量耗散机理上阐述累积塑性应变的开展。研究结果表明：随着循环应力比增大,黏滞累积能量耗散速率将逐渐超越塑性应变累积能量耗散速率。将累积塑性应变增长形式细分为4类：稳定型、稳定破坏型、破坏型、和崩塌型。同时认为塑性应变累积能量耗散的产生是由于砂粒、粉粒等较大颗粒发生颗粒重排,而黏滞累积能量耗散的产生是由于黏粒、胶粒等较小颗粒间双电离子层内弱结合水发生脱离,粒间发生相对滑移。上述能量耗散机理与建立的累积塑性应变增长方式分类相一致,为进一步研究累积塑性应变模型提供研究基础。
- 饱和尾粉土 /
- 循环应力比 /
- 累积塑性应变 /
- 能量耗散 /
- 塑性应变累积能量 /
- 黏滞累积能量
Abstract: In order to study the relationship between the accumulative plastic strain growth and the energy dissipation, and to further classify the pattern of the accumulative plastic strain growth, dynamic consolidated-undrained triaxial shear tests are conducted on tailing silts with different void ratios under different cyclic stress ratios. The energy dissipation in soil is divided into plastic strain and viscous accumulative energy dissipations. According to the relationships, failure modes of the accumulative plastic strain growth are reclassified, and the development of accumulative plastic strain is interpreted based on the improved energy dissipation mechanism. The research highlights that as the cyclic stress ratio keeps increasing, the rate of dissipation of viscous accumulative energy will exceed that of the plastic strain accumulative energy,and the development mode of accumulative plastic strain will turn from the stability to the failure. Furthermore, the failure modes are reasonably divided into four categories: stable type, stable damage type, damage type and collapse. Essentially, the plastic strain accumulative energy will dissipate due to the rearrangement among relatively large particles such as sand and silt grains. Similarly, the viscous accumulative energy will dissipate because of the relative slippage among clay particles and colloid particles under the relaxation of weak bound water in the double electrical layers. This energy dissipation mechanism is consistent with the proposed failure pattern of the accumulative plastic strain growth. The research results may provide a basis for further model researches on the accumulative plastic strain growth.
- saturated tailing silt /
- cyclic stress ratio /
- accumulative plastic strain /
- energy dissipation /
- plastic strain accumulative energy /
- viscous accumulative energy

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参考文献(23)

[1]	SEED H B, CHAN C K. Clay strength under earthquake loading conditions[J]. Journal of Soil Mechanics and Foundations Division, ASCE, 1966, 92: 53-78.
[2]	YASUHARA K, YAMANOUCHI T, HIRAO K. Cyclic strength and deformation of normally consolidated clay[J]. Soils and Foundations, 1982, 22(3): 77-91.
[3]	HYODO M, YASUHARA K, MURATA H. Deformation analysis of the soft clay foundation of low embankment road under traffic loading[C]// Proceeding of the 31st Symposium of Japanese Society of Soil Mechanics and Foundation Engineering, 1996: 27-32.
[4]	辛鸿博, 王余庆. 大石河尾矿黏性土的动力变形和强度特征[J]. 水利学报, 1995(11): 56-62. (XIN Hong-bo, WANG Yu-qing. Cyclic deformation and strength of dashihe slimes[J]. Journal of Hydraulic Engineering, 1995(11): 56-62. (in Chinese))
[5]	阮元成, 郭新. 饱和尾矿料动力变形特性的试验研究 [J]. 水利学报, 2003(4): 24-29. RUAN Yuan-cheng, GUO Xin. Experimental study on dynamic deformation properties of saturated tailings material [J]. Journal of Hydraulic Engineering, 2003(4): 24-29.
[6]	陈存礼, 何军芳, 胡再强, 等. 动荷作用下饱和尾矿砂的孔压和残余应变演化特性[J]. 岩石力学与工程学报, 2006, 25(增刊2): 4034-4039. (CHEN Cun-li,HE Jun-fang,HU Zai-qiang,et al. Developing characteristics of pore water pressure and residual deformation of tailings sands under cyclic load[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 4034-4039. (in Chinese))
[7]	SEED H B, LEE K L, IDRISS I M, et al. The slides in the San Fernando Dams during the earthquake of February 9, 1971[J]. Journal of Geothechnical Engineering, 1975, 101(GT7): 637-652.
[8]	PARR G B. Some aspects of the behavior of London clay under repeated loading[D]. Nottingham: University of Nottingham, 1972.
[9]	MONISMITH C L, OGAWA N, FREEME C R. Permanent deformation characteristics of subgrade soils due to repeated loading [J]. Transportation Research Record, 1975, 537: 1-17.
[10]	刘添俊, 莫海鸿. 长期循环荷载作用下饱和软黏土的应变速率[J]. 华南理工大学学报（自然科学版）, 2008, 36(10): 37-42. (LIU Tian-jun, MO Hai-hong. Strain rate of saturated soft clay under long-term cyclic loading[J]. Journal of South China University of Technology (Natural Science Edition), 2008, 36(10): 37-42. (in Chinese))
[11]	黄茂松, 姚兆明. 循环荷载下饱和软黏土的累积变形显式模型[J]. 岩土工程学报, 2011, 33(3): 325-331. (HUANG Mao-song, YAO Zhao-ming. Explicit model for saturated clay behavior subjected to cyclic loading [J]. Chinese Journal of Geotechnical Engineering, 2011, 33(3): 325-331. (in Chinese))
[12]	边学成, 卢文博, 蒋红光, 等．粉土循环累积应变和残余动模量的试验研究[J]. 岩土力学, 2013, 34(4): 974-980. (BIAN Xue-cheng, LU Wen-bo, JIANG Hong-guang, et al. Experimental study of cumulative axial strain and residual dynamic modulus of silt soil[J]. Rock and Soil Mechanics, 2013, 34(4): 974-980. (in Chinese))
[13]	NEMAT S, NASSER A S. A unified approach to densification and liquefaction of cohesionless sand in cyclic shearing[J]. Canadian Geotechnical Journal, 1979, 16(4): 659-678.
[14]	刘叔灼, 李慧子, 单毅, 等. 基于能量法的尾矿土动孔压模型研究[J]. 岩土工程学报, 2016, 38(11): 2051-2058. (LIU Shu-zhuo, LI Hui-zi, SHAN Yi, et al. Energy-based method for analyzing pore water pressure model of Tailing soil[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(11): 2051-2058. (in Chinese))
[15]	SL 237—1999 土工试验规程[S]. (SL 237—1999 Specification of soil test[S]. 1999. (in Chinese))
[16]	POLITO C P, GREEN R A, LEE J. Pore pressure generation models for sands and silty soils subjected to cyclic loading[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2008, 134: 1490-1500.
[17]	沈扬, 闫俊, 张朋举, 等. 主应力方向变化路径下密实粉土强度特性差异和能量评价方法研究[J]. 岩土力学, 2011, 32(增刊1): 118-123, 326. (SHEN Yang, YAN Jun, ZHANG Peng-ju, et al. Strength characteristics of isotropically consolidated silt under change of principal stress orientation and correlative evaluation method with collapse energy[J]. Rock and Soil Mechanics, 2011, 32(S1): 118-123, 326. (in Chinese))
[18]	陈伟, 孔令伟, 朱建群. 一种土的阻尼比近似计算方法[J]. 岩土力学, 2007, 28(增刊1):: 789-791. (CHEN Wei, KONG Ling-wei, ZHU Jian-qun. A simple method to approximately determine the damping ratio of soils[J]. Rock and Soil Mechanics, 2007, 28(S1): 789-791. (in Chinese))
[19]	雷华阳, 姜岩, 陆培毅, 等. 交通荷载作用下结构性软土动应力-动应变关系试验研究[J]. 岩石力学与工程学报, 2007, 27(增刊1): 3052-3057. (LEI Hua-yang, JIANG Yan, LU Pei-yi, et al. Experimental study of dynamic stress-strain relation of structural soft soil under traffic load[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 27(S1): 3052-3057. (in Chinese))
[20]	张勇, 孔令伟, 郭爱国, 等. 循环荷载下饱和软黏土的累积塑性应变试验研究[J]. 岩土力学, 2009, 30(6): 1542-1548. (ZHANG Yong, KONG Ling-wei, GUO Ai-guo, et al. Cumulative plastic strain of saturated soft clay under cyclic loading[J]. Rock and Soil Mechanics, 2009, 30(6): 1542-1548. (in Chinese))
[21]	唐益群, 赵化, 王元东, 等. 地铁荷载下隧道周围加固软黏土应变累积特性[J]. 同济大学学报(自然科学版), 2011, 39(7): 972-977. (TANG Yi-qun, ZHAO Hua, WANG Yuan-dong, et al. Characteristics of strain accumulation of reinforced soft clay around tunnel under subway vibration loading[J]. Journal of Tongji University(Nature Science), 2011, 39(7): 972-977. (in Chinese))
[22]	BOULANGER R W, IDRISS I M. Liquefaction susceptibility criteria for silts and clays[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132: 1413-1426.
[23]	谢定义. 土动力学[M]. 北京: 高等教育出版社, 2011. (XIE Ding-yi. Soil dynamics[M]. Beijing: High Education Press, 2011. (in Chinese))

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基于能量法的尾粉土累积应变增长方式研究 English Version

作者简介: 莫海鸿(1955-),男,博士,教授,博士生导师,主要从事岩土工程和地下结构方面的教学与科研工作。E-mail:cvhhmo@scut.edu.cn。

通讯作者: 陈俊生，E-mail：jschen@scut.edu.cn

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出版历程

Energy-based method for analyzing accumulative plastic strain growth of tailing silt

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出版历程

目录

作者简介:
莫海鸿(1955-),男,博士,教授,博士生导师,主要从事岩土工程和地下结构方面的教学与科研工作。E-mail:cvhhmo@scut.edu.cn。

通讯作者:
陈俊生，E-mail：jschen@scut.edu.cn