Measurement of deformations on concrete subjected to compression using image correlation

S. Choi*, S. P. Shah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

204 Scopus citations

Abstract

Because the nature of failure in concrete is complicated due to the material heterogeneity, a robust measuring method is essential to obtain reliable deformation data. A nondestructive displacement evaluation system using a digital image cross-correlation scheme, often called computer vision, is developed to make microscopic examinations of the fracture processes in concrete. This is a full-field measuring method that gives an accuracy within the micron range for a 100 mm × 75 mm viewing area. A feedback signal that combines the lateral and axial deformations provides a well-balanced imaging rate both before and after the peak load. Displacement vector diagrams or displacement contour maps of concrete reveal highly nonuniform deformations even in the elastic range. The processes of fracture in concrete are well defined at different deformation levels.

Original languageEnglish (US)
Pages (from-to)307-313
Number of pages7
JournalExperimental Mechanics
Volume37
Issue number3
DOIs
StatePublished - Sep 1997

Keywords

  • Concrete
  • Digital image cross correlation
  • Feedback signal
  • Fracture
  • Nondestructive evaluation

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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