The application of a digital image correlation method for crack observation

M. H. Shih, S. H. Tung, Jui-Chao Kuo, W. P. Sung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The detection of crack development in masonry wall is an important task for investigating the earthquake resistant capability of masonry structures. Traditionally, the work is done by manual observation and documenting, which are inaccurate and time-consuming. The well-known measurement technology of crack observation utilizes the strain gauge or elongation meters. However, these methods usually fail in prediction of crack position. Other precise technologies require austere test conditions, which make them unrealistic. The present study attempted utilizing the digital image correlation (DIC) technique to identify the crack development. The DIC is a new developed non contact- type measurement technique. The advantage of this technique is that the whole displacement and strain field can be analyzed and the sample will not be disturbed. It compares two photos of specimens without and under loading respectively. By optimizing the correlation coefficient of the two images, the optimal parameters of the displacement filed are identified. The strain field is then obtained. Subsequently, the crack can be found out by identifying the significant variation of strain and/or displacement. In this paper, a test on one masonry wall sample was performed to verify the performance of the digital image correlation method. The micro cracks are successfully identified by DIC before they can be found manually. The results shows a great application possibility of the DIC in various situations such as shrinkage induced crack of fresh concrete, healthy monitoring of masonry and reinforced concrete structures and safety monitoring of bridges.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Computational Structures Technology, CST 2006
PublisherCivil-Comp Press
Volume83
ISBN (Print)9781905088089
Publication statusPublished - 2006 Jan 1
Event8th International Conference on Computational Structures Technology, CST 2006 - Las Palmas de Gran Canaria, Spain
Duration: 2006 Sep 122006 Sep 15

Other

Other8th International Conference on Computational Structures Technology, CST 2006
CountrySpain
CityLas Palmas de Gran Canaria
Period06-09-1206-09-15

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Computational Theory and Mathematics
  • Artificial Intelligence

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