局部加卸载下立方体阵列接触力残留的细观特性

doi:10.13722/j.cnki.jrme.2016.1622

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (447 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要基于光弹试验分析立方体阵列在一个分级加卸载周期下力链和颗粒位移的演化过程，结果表明，接触力和颗粒位移在卸载阶段均存在残留，且接触力和颗粒位移的演化特征一致表明，卸载过程中存在一个临界荷载值。通过建立主力链颗粒的串联接触模型，得出残留接触力取决于力链所受侧向摩阻力，包括颗粒间接触摩擦与咬合力。结合光弹条纹解析所得特征颗粒所受接触力，分析加卸载作用下主力链所受摩阻力的演化特征，得出加卸载过程中主力链所受摩阻力与外荷载呈正相关，表明随着外荷载的增大，颗粒体系的内摩擦作用逐渐发挥以抵抗外力；但相同外荷载下，加载和卸载阶段主力链所受摩阻力并不相等，是立方体阵列产生残留接触力的根源。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	付龙龙
	周顺华
	王长丹
	宫全美

关键词 ：岩石力学, 立方体阵列, 加卸载, 接触力残留, 内摩擦, 光弹试验

Abstract：Photo-elastic test was performed to analyze the evolution of force chain and block displacement in block array under a multi-stage loading and unloading cycle. The results demonstrate that both the contact force and block displacement show the visible ‘hysteresis’ during unloading. The evolution characteristics of both the contact force and block displacement indicate a critical load during unloading. A serial contact model was established to simplify the contact state of the block column transmitted by primary force chain，which reveals that the residual contact force depends on the lateral friction resistance，including the inter-particle friction and inter-particle lock. The contact force acted on the representative block was quantified by fringe analysis to achieve the evolution of lateral friction resistance on primary force chain during loading and unloading. The lateral friction resistance is positively associated with the applied load，indicating that greater inter-particle friction and contact resistance induced by the inter-particle lock are activated to resist the increasing applied load. The difference of lateral friction resistance under the same applied load between loading phase and unloading phase is the mechanism of residual contact force in block array.

Key words： rock mechanics block array loading and unloading residual contact force internal friction photo-elastic test

引用本文:

付龙龙，周顺华，王长丹，宫全美. 局部加卸载下立方体阵列接触力残留的细观特性[J]. 岩石力学与工程学报, 2017, 36(12): 2981-2989.
FU Longlong，ZHOU Shunhua，WANG Changdan，GONG Quanmei. Mesoscopic characteristics of residual contact force in block array subjected to partial loading and unloading. , 2017, 36(12): 2981-2989.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2016.1622 或 http://www.rockmech.org/CN/Y2017/V36/I12/2981

[14]	庄丽，周顺华. 散粒体卸载特性的三轴伸长试验研究[J]. 固体力学学报，2009，30(4)：354-360.(ZHUANG Li，ZHOU Shunhua. Triaxial extension test study on the unloading behavior of granular[J]. Chinese Journal of Solid Mechanics，2009，30(4)：354-360.(in Chinese))
[1]	范鹏贤，王明洋，钱七虎. 深部非均匀岩体卸载拉裂的时间效应和主要影响因素[J]. 岩石力学与工程学报，2010，29(7)：1 389-1 396. (FAN Pengxian，WANG Mingyang，QIAN Qihu. Time effect and main influence factors of unloading splitting of deep-seated rock with nonuniformities[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(7)：1 389-1 396.(in Chinese))
[23]	李铀， MAULDON M. 岩土工程中的二个理论问题的探讨[J]. 岩石力学与工程学报，1999，18(2)：227-229.(LI You，MAULDON M. Research on two theoretical problems of geotechnical engineering[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(2)：227-229.(in Chinese))
[13]	吴迪，周顺华，贾剑. 开挖问题摩擦效应的有限元计算方法[J].岩石力学与工程学报，2015，34(5)：907-914.(WU Di，ZHOU Shunhua，JIA Jian. A finite element method of excavation problem by considering frictional effect of material[J]. Chinese Journal of Rock and Soil Mechanics，2015，34(5)：907-914.(in Chinese))
[2]	庄丽. 散粒体的加卸载与应力释放特性[博士学位论文][D]. 上海：同济大学，2009.(ZHUANG Li. Loading and unloading behavior and stress release of granular[Ph. D. Thesis][D]. Shanghai：Tongji University，2009.(in Chinese)) " target="_blank">
[6]	周顺华，高渠清，崔之鉴. 开挖应力释放率计算模型[J]. 上海力学，1997，18(1)：91-98.(ZHOU Shunhua，GAO Quqing，CUI Zhijian. The algorithmic model of the release ratio of excavation stress[J]. Shanghai Journal of Mechanics，1997，18(1)：91-98.(in Chinese))
[9]	钱七虎，周小平. 岩体非协调变形对围岩中的应力和破坏的影响[J]. 岩石力学与工程学报，2013，32(4)：649-656.(QIAN Qihu，ZHOU Xiaoping. Effects of incompatible deformation on failure mode and stress field of surrounding rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(4)：649-656.(in Chinese))
[10]	HUANG H. Discrete element modeling of railroad ballast using imaging based aggregate morphology characterization[Ph. D. Thesis][D]. Illinois，USA：University of Illinois at Urbana- Champaign，2010. " target="_blank">
[11]	WANG J. Shakedown analysis and design of flexible road pavements under moving surface loads[M. S. Thesis][D]. Nottingham，UK：University of Nottingham，2011. " target="_blank">
[12]	吕爱钟，焦春茂. 岩石力学中两个基本问题的探讨[J]. 岩石力学与工程学报，2004，23(23)：4 095-4 098.(LU Aizhong，JIAO Chunmao. Discussion of two elementary problems in rock mechanics[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(23)：4 095- 4 098.(in Chinese))
[17]	付龙龙，周顺华，宫全美，等. 局部加卸载下颗粒体系接触力残留与应力残留的关系[J]. 同济大学学报：自然科学版，2017，45(7)：985-993.(FU Longlong，ZHOU Shunhua，GONG Quanmei，et al. Relationship between residual contact force and residual stress in granular packings subjected to partial loading and unloading[J]. Journal of Tongji University：Natural Science，2017，45(7)：985-993.(in Chinese))
[18]	LABUZ F. Joseph，Theroux Brent，Laboratory calibration of earth pressure cells[J]. Geotechnical Testing，2005，28(2)：188-196. " target="_blank">
[19]	范钦珊，王杏根，陈巨兵，等. 工程力学实验[M]. 北京：高等教育出版社，2006：133-134.(FAN Qinshan，WANG Xingyin，CHEN Jubing，et al. Engineering mechanics experiments[M]. Beijing：Higher Education Press，2006：133-134.(in Chinese)) " target="_blank">
[3]	周顺华，许恺，王炳龙，等. 软土地基超载卸载再加荷的沉降研究[J]. 岩土工程学报，2005，27(10)：1 226-1 229.(ZHOU Shunhua，XU Kai，WANG Binglong，et al. Research on settlement of soft ground under overloading-unloading and reloading[J]. Chinese Journal of Geotechnical Engineering，2005，27(10)：1 226-1 229.(in Chinese))
[4]	MOMOYA Y，SEKINE E，TATSUOKA F. Deformation characteristics of railway roadbed and subgrade under moving wheel load[J]. Soils and Foundations，2005，45(4)：99-118. " target="_blank">
[5]	陈宗基. 中国岩石力学学科发展及工程应用[C]// 第四届国际岩石力学大会. [S. l.]：[s. n.]，2005：9-10.(CHEN Zongji. The development and engineering application for Chinese rock mechanics[C]// The Fourth International Congress on Rock Mechanics. [S. l.]：[s. n.]，2005：9-10.(in Chinese)) " target="_blank">
[7]	SELIG E T. Tensile zone effects on performance of layered systems[J]. Géotechnique，1987，37(3)：247-254. " target="_blank">
[21]	DAVIDE B，GIOVANNI N. Localized stress percolation through dry masonry walls[J]. Part II-Modelling. European Journal of Mechanics- A/Solids，2010，29(3)：299-307. " target="_blank">
[8]	付龙龙，宫全美，王长丹，等. 局部加卸载下散粒体中接触力的残留特性及细观机制[J]. 同济大学学报：自然科学版，2015，43(11)：1 642-1 648.(FU Longlong，GONG Quanmei，WANG Changdan，et al. Residual characteristics and meso-mechanism of contact force in granular materials under partial loading and unloading[J]. Journal of Tongji University：Natural Science，2015，43(11)：1 642-1 648.(in Chinese))
[15]	张楚汉. 论岩石、混凝土离散-接触-断裂分析[J]. 岩石力学与工程学报，2008，27(2)：217-235.(ZHANG Chuhan. Discrete-contact-fracture analysis of rock and concrete[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：217-235.(in Chinese))
[16]	蒋明镜，陈贺，刘芳. 岩石微观胶结模型及离散元数值仿真方法初探[J]. 岩石力学与工程学报，2013，32(1)：15-23.(JIANG Mingjing，CHEN He，LIU Fang. A microscopic bond model for rock and preliminary study of numerical simulation method by distinct element method[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(1)：15-23.(in Chinese))
[20]	DAVIDE B，GIOVANNI N. Localized stress percolation through dry masonry walls[J]. Part I-Experiments. European Journal of Mechanics- A/Solids，2010，29(3)：291-298. " target="_blank">
[22]	付龙龙. 颗粒体系加卸载应力残留特性的细观机制[博士学位论文][D]. 上海：同济大学，2016.(FU Longlong. Mechanism of residual stresses in granular packings：a micro-mechanical analysis[Ph. D. Thesis][D]. Shanghai：Tongji University，2016.(in Chinese)) " target="_blank">