循环剪切荷载作用下岩石节理强度劣化规律试验模拟研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (367 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要采用水泥砂浆为相似材料，制备5种起伏角度、3种岩壁强度的锯齿型节理试样。利用自行研制的节理循环剪切试验机，对制备的节理试样进行4种法向应力下的循环剪切试验。根据循环剪切试验过程和试验曲线，分析单个剪切循环中应力–位移曲线的峰值强度特点，以来表示节理在第n个剪切循环中的峰值剪切强度；并进一步定义 = / 为剪切强度比，来表征节理在循环剪切荷载作用下经历一定剪切循环后峰值强度的劣化程度。基于多种条件下的节理循环剪切试验结果和定义的指标，分析峰值剪切强度随循环剪切周期N的变化规律；并通过对比不同工况的试验结果，分析起伏角度、法向应力、岩壁强度对循环剪切荷载作用下节理强度劣化规律的影响。

	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

关键词 ：岩石力学, 循环剪切荷载, 剪切强度比, 强度劣化

Abstract：Using cement mortar as similar material，joint specimens with three joint wall strengths and five asperity angles were prepared. Then a series of cyclic shear tests are performed at four normal stresses on the cyclic shear test apparatus. Tests results show that，shear stress-shear displacement curve has peak strength of each shear cycle，and the shear strength of joints gradually decrease with the cyclic number increase. The peak shear strength of joint after n cycles is expressed as ，then the = / is defined as shear strength ratio，so as to characterize the degree of strength deterioration under cyclic shear loads. Based on a variety of cyclic shear test results and ，the relationships between peak shear strength of joints and shear cycles are analyzed. By comparing the results under different experimental conditions，the effects of asperity angles，joint wall strength and normal stress on the joint mechanical properties are also analyzed.

Key words： rock mechanics cyclic shear loading shear strength ratio strength degradation

收稿日期: 2011-05-17

引用本文:

刘博，李海波，朱小明. 循环剪切荷载作用下岩石节理强度劣化规律试验模拟研究[J]. 岩石力学与工程学报, 2011, 30(10): 2033-2039.
LIU Bo，LI Haibo，ZHU Xiaoming. EXPERIMENT SIMULATION STUDY OF STRENGTH DEGRADATION OF ROCK JOINTS UNDER CYCLIC SHEAR LOADING. , 2011, 30(10): 2033-2039.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I10/2033

[7]	JAEGER J C. Friction of rocks and stability of rocks slopes[J]. " target="_blank">
[1]	黄润秋，裴向军，李天斌. 汶川地震触发大光包巨型滑坡基本特征及形成机制分析[J]. 工程地质学报，2008，16(6)：731-741. (HUANG Runqiu，PEI Xiangjun，LI Tianbin. Basic characteristics and formation mechanism of the largest scale landslide at Daguangbao occurred during the Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(6)：731-741.(in Chinese)) " target="_blank">
[4]	RODRIGUEZ C E，BOMMER J J，CHANDLER R J. Earthquake- induced landslides：1980-1997[J]. Soil Dynamics and Earthquake Engineering，1999，18(3)：325-346. " target="_blank">
[11]	LEE H S，PARK Y J，CHO T F，et al. Influence of asperity degradation on the mechanical behavior of rough rock joints under cyclic shear loading[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(7)：967-980. " target="_blank">
[3]	黄润秋，许强. 中国典型灾难性滑坡[M]. 北京：科学出版社，2008：12-18.(HUANG Runqiu，XU Qiang. Catastrophic landslides in China[M]. Beijing：Science Press，2008：12-18.(in Chinese)) " target="_blank">
[8]	PLESHA M E. Constitutive models for rock discontinuities with dilatancy and surface degradation[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1987，14(4)：345-362. " target="_blank">
[10]	KANA D D，FOX D J，HSIUNG S M. Interlock/friction model for dynamic shear response in natural jointed rock[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1996，33(4)：371-386. " target="_blank">
	Geotechnique，1971，21(2)：97-134. " target="_blank">
[13]	SOULEY M，HOMAND F，AMADEI B. An extension to the Saeb and Amadei constitutive model for rock joints to include cyclic loading paths[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1995，32(2)：101-109. " target="_blank">
[14]	QIU X，PLESHA M E，HUANG X. An investigation of the mechanics of rock joints—part II analytical investigation[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(3)：271-287. " target="_blank">
[16]	BELEM T，HOMAND-ETIENNE F，SOULEY M. Fractal analysis of shear joint roughness[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(3/4)：130. e1-130.e16. " target="_blank">
[18]	JING L，STEPHANSSON O，NORDLUND E. Study of rock joints under cyclic loading conditions[J]. Rock Mechanics and Rock Engineering，1993，26(3)：215-232. " target="_blank">
[2]	李忠生. 国内外地震滑坡灾害研究综述[J]. 灾害学，2003，18(4)：64-70.(LI Zhongsheng. The state of the art of the research on seismic landslide hazard at home and abroad[J]. Journal of Catastrophology，2003，18(4)：64-70.(in Chinese))
[5]	HUANG W L. Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi earthquake[J]. Tunnelling and Underground Space Technology，2001，16(3)：133-150. " target="_blank">
[6]	胡志奇，郑文衡，陆明勇. 岩体动态应力在地震机制中的作用研究[J]. 大地测量与地球动力学，2005，25(1)：108-112.(HU Zhiqi，ZHENG Wenheng，LU Mingyong. Preliminary study of crustal stress and its effect on earthquake triggering[J]. Journal of Geodesy and Geodynamics，2005，25(1)：108-112.(in Chinese)) " target="_blank">
[9]	JAFARI M K，HOSSEINI K A，PELLET F，et al. Evaluation of shear strength of rock joints subjected to cyclic loading[J]. Soil Dynamic and Earthquake Engineering，2003，23(7)：619-630. " target="_blank">
[12]	HOMAND F，BELEM T，SOULEY M. Friction and degradation of rock joints surfaces under shear loads[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2001，25(10)：973-999. " target="_blank">
[19]	尹显俊，王光纶，张楚汉. 岩体结构面切向循环加载本构关系研究[J]. 工程力学，2005，22(6)：98-103.(YIN Xianjun，WANG Guanglun，ZHANG Chuhan. Study of constitutive model for rock interfaces and joints under cyclic shear loading[J]. Engineering Mechanics，2005，22(6)：98-103.(in Chinese))
[15]	HUTSON R W，DOWDING C H. Joint asperity degradation during cyclic shear[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1990，27(2)：109-119. " target="_blank">
[17]	HUANG X F. A laboratory study of the mechanical behavior of rock joints-with particular interest to dilatancy and asperity surface damage mechanism[Ph. D. Thesis][D]. Madison：University of Wisconsin，1990. " target="_blank">