Quantitative study on crack of meso-damage and fracture concrete based on CT technique

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• 作者：WEI TIAN (1) (3)
  FANING DANG (2)
  YONGLI XIE (3)
  
  1. School of Civil Engineering ; Chang鈥檃n University ; Xi鈥檃n ; 710061 ; China
  3. School of Highway ; Chang鈥檃n University ; Xi鈥檃n ; 710064 ; China
  2. Institute of Geotechnical Engineering ; Xi鈥檃n University of Technology ; Xi鈥檃n ; 710048 ; China
  
• 关键词：Concrete ; meso ; damage evolution ; CT image ; meso ; crack ; quantitative analysis.
• 刊名：Sadhana
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：40
• 期：1
• 页码：263-276
• 全文大小：2,062 KB
• 参考文献：1. Ammouche A, Breysse D and Hornain H 2000 A new image analysis technique for the quantitative assessment of micro cracks in cement-based materials. / Cement Concrete Research 30(6): 25鈥?5
  2. Chen H-Q, Ding W-H and Dang F-N 2006 Real time observation on meso fracture process of concrete using X-ray CT under uniaxial compressive condition. / J. Hydraul. Eng. 37(9): 1044鈥?050
  3. Dang F-N, Liu Y-W and Ding W-H 2007 Quantitative Analysis of concrete CT image Based on damage-fracture evolution theory. / Chinese J. Rock Mechanics and Eng. 26(8): 1588鈥?594
  4. Ding W-H, Chen H-Q and Zhang J-J 2006 X-ray CT detecting on concrete fracture process under high strain rate. / J. Building Structures Supp2: 758鈥?62
  5. Ding W-H, Chen H-Q, Yin XT, Liu S-C and Zhang Jian 2009 Study of key techniques of dynamic loading CT test device for rock-like material. / Chinese J. Rock Mechanics and Eng. 28(8): 1620鈥?628
  6. Garboczi E J 2002 Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: Application to aggregates used in concrete. / Cement and Concrete Res. 32(10): 1621鈥?638
  7. Morgan I L, Ellinger H and Klinksiek R 1980 Examination of concrete by computerized tomography. / ACI J. 77(1): 23鈥?7
  8. Suzuki Tetsuya, Ogata Hidehiko, Takada Ryuichi, Aoki Masao and Masayasu Ohtsu 2010 Use of acoustic emission and X-ray computed tomography for damage evaluation of freeze-thawed concrete. / Construction and Building Materials 24(12): 2347鈥?352
  9. Tian W, Dang F-N and Chen H-Q 2010 Development and application of the dynamic loading apparatus on CT experiment. / Rock and Soil Mechanics 31(1): 329鈥?13
  10. Tian W, Dang F-N and Chen H-Q 2011 Research on meso Damage-fracture Divisional Zones of Concrete Based on Uniaxial Compression CT Experiment. / J. Hydraul. Eng. 42(8): 124鈥?30
  11. Wang L-B, Jinyoung Park and Fu Y-R 2007 Representation of real particles for DEM simulation using X-ray tomography. / Construction and Building Materials 21(2): 338鈥?46
  12. Wong R C K and Chau K T 2005 Estimation of air void and aggregate spatial distributions in concrete under uniaxial compression using computer tomography scanning. / Cement and Concrete Research 35(8): 1566鈥?576
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  
• 出版者：Springer India, in co-publication with Indian Academy of Sciences
• ISSN：0973-7677

文摘

The meso-mechanics experiment of concrete specimen is carried out by means of CT technology, the whole degradation deformation process of meso-cracks generation, propagation, coalescence and failure is obtained under uniaxial compression condition. Based on CT image of concrete meso-damage evolution, the recognition and extraction of meso-cracks are realized by means of the digital imageprocessing (DIP) technique, and the basic geometrical characteristics of meso-crack patterns are statistically analysed from length, width and area. The quantitative analysis of the meso-fracture process of concrete materials is performed. The results demonstrate that the quantitative analysis of the internal meso-crack of concrete can be taken as a quantitative index to reflect the damage and fracture process thereby the meso-fracture mechanism of concrete material is thoroughly investigated. So it has brought forth some new ideas to the study of damage evolution law of concrete under uniaxial compression condition.