[1]任建喜,冯晓光,刘 慧.三轴压缩单一裂隙砂岩细观损伤破坏特性CT分析[J].西安科技大学学报,2009,(03):300-304338.
 REN Jian-xi,FENG Xiao-guang,LIU Hui.CT testing on meso-damage propagation mechanism of cracked- sandstone sample under triaxial compression loading[J].Journal of Xi'an University of Science and Technology,2009,(03):300-304338.
点击复制

三轴压缩单一裂隙砂岩细观损伤破坏特性CT分析()
分享到:

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2009年03期
页码:
300-304338
栏目:
出版日期:
2009-06-11

文章信息/Info

Title:
CT testing on meso-damage propagation mechanism of cracked- sandstone sample under triaxial compression loading
文章编号:
1672-9315(2009)03-0300-05
作者:
任建喜冯晓光刘 慧
西安科技大学 建筑与土木工程学院,陕西 西安 710054
Author(s):
REN Jian-xiFENG Xiao-guangLIU Hui
College of Civil and Architecture Engineering,Xi'an University of Science and Technology, Xi'an 710054,China
关键词:
关键词: 预制单一裂隙砂岩 三轴压缩 损伤演化 CT试验
Keywords:
cracked-sandstone with simple crack triaxial compression loading damge evolution CT testing
分类号:
TD315+.1
文献标志码:
A
摘要:
摘 要: 完成了含单一预制裂纹的裂隙砂岩三轴压缩条件下的细观破坏特性CT实时扫描试验。得到了裂纹萌生、发展、宏观裂纹形成、破坏等各阶段的CT图像。结果表明,与完整岩石试样一样,三轴压缩单一裂隙砂岩的破坏过程也可以分为线性发展阶段、细观裂纹萌生及发展阶段、损伤快速发展阶段和峰后损伤加速发展阶段等4个阶段,但是,由于已有裂隙的存在,裂隙岩石的损伤演化速度高于完整岩石的损伤演化速度,已有预制裂纹对新的裂纹的起裂位置及贯通性宏观破坏裂纹的形成具有重要影响,裂隙砂岩试样的扩容量大于完整试样破坏时的扩容量。
Abstract:
The CT real time testing on meso-damage propagation mechanism of cracked-sandstone containing one crack under triaxial compression has been accomplished. The CT images of different stages such as crack birth,development, macro-crack formation and sample failure are obtained. As similar to non-cracked rock sample failure processing, it shows that the failure process of cracked-sandstone under triaxial compressing can be divided into 4 stages including liner-developing, meso-crack birth and developing, damage fast developing and damage speedup developing in post-failure stage. The meso-damage evolution speed of jointed rock sample is larger than that of the rock sample. The pre-crack can seriously affect the location of new crack birth and the formation of connectivity macro-crack. Because of the pre-cracked existing, the expansion speed of the cracked-rock sample under triaxial compression are large than the noncracked rock sample.

参考文献/References:

[1] 杨更社,张长庆.岩体损伤及检测[M].西安:陕西科学技术出版社,1998.
YANG Geng-she,ZHANG Quan-sheng.Rock mass damage snd detectin[M].Xi'an:Shaanxi Science and Technology Press,1998.
[2] 任建喜.岩石损伤演化机理CT实时检测[M].西安:陕西科学技术出版社,2003.
REN Jian-xi.CT real-time detection of evolution for rock damage[M].Xi'an:Shaanxi Science and Technology Press,2003.
[3] 杨更社,张长庆.冻融循环条件下岩石损伤扩展研究初探[J].西安科技大学学报,1999,19(2): 97-100.
YANG Geng-she,ZHANG Chang-qing.Initial discussion on the damage propagation of rock under the frost and thaw condition[J].Journal of Xi'an University of Science and Technology,1999,19(2):97-100.
[4] 杨更社.岩石损伤与CT检测技术[J].西安科技大学学报,1997,17(3):195-198.
YANG Geng-she.Rock damage and measurement technique[J].Journal of Xi'an University of Science and Technology,1997,17(3):195-198.
[5] 杨更社,张全胜,任建喜,等.冻结速度对铜川砂岩损伤CT数变化规律研究[J].岩石力学与工程学报,2004,23(24):4 099-4 104.
YANG Geng-she,ZHANG Quan-sheng,REN Jian-xi,et al.Study on the effect of freezing rate on the damage ct values of Tongchuan sandstone[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(24):4 099-4 104.
[6] 崔中兴,仵彦卿,蒲毅彬,等.渗流状态下砂岩的三维实时CT观测[J].岩石力学与工程学报,2005,24(8):1 390-1 393.
CUI Zhong-xing,WU Yan-qing,PU Yi-bin,et al. Triaxial real-time observations of sandstone under seepage by X-ray CT scan[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(8):1 390-1 393.
[7] 党发宁,尹小涛,丁卫华,等.基于CT试验的岩体分区破损本构模型[J].岩石力学与工程学报,2005,24(22):4 003-4 009.
DANG Fa-ning,YIN Xiao-tao,DING Wei-hua,et al.Subarea breakage constitutive model of rock mass based on CT test[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(22):4 003-4 009.
[8] 尹小涛,党发宁,丁卫华,等.基于单轴压缩CT实验的砂岩破损机制[J].岩石力学与工程学报, 2005,24(增2):3 891-3 897.
YIN Xiao-tao,DANG Fa-ning; DING Wei-hua,et al. Breakage mechanism of sandstone based on uniaxial compression CT test[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(S2):3 891-3 897.
[9] 钱向东,姜弘道.多轴强度安全系数的定义及应用[J].建筑科学与工程学报,2008,25(1):38-42.
QIAN Xiang-dong,JIANG Hong-dao.Definition and application of safety factor for multiaxial strength[J].Journal of Architecture and Civil Engineering,2008,25(1):38-42.
[10]任建喜,惠兴田.裂隙岩石单轴压缩损伤扩展细观机理CT分析初探[J].岩土力学,2005, 24(增1):48-52.
REN Jian-xi,HUI Xing-tian. Primary study on meso-damage propagation mechanism of cracked-sandstone using computerized tomography under uniaxial compression[J].Rock and Soil Mechanics, 2005, 24(S1):48-52.
[11]张素梅,吴志坚,马欣伯.预制混凝土板对组合剪力墙抗剪静力性能的影响[J].建筑科学与工程学报,2008,25(1):18-22.
ZHANG Su-mei,WU Zhi-jian,MA Xin-bo.Influence of precast concrete-plate on static behavior of steel-concrete composite shear wall[J].Journal of Architecture and Civil Engineering,2008,25(1):18-22.

备注/Memo

备注/Memo:
收稿日期: 2008-10-30 基金项目: 教育部科学技术研究重点项目(207119); 陕西省教育厅专项基金项目(08JK362) 作者简介: 任建喜(1968-),男,陕西西安人,教授,博导,主要从事岩土工程教学与科研工作.
更新日期/Last Update: 2009-06-11