Abstract
We examine the performance of an image analysis based on the digital image correlation for measuring and visualizing the crack propagation of concrete test specimen under compressive load. The image analysis method used in this study is an original approach we have developed to measure the crack propagation in concrete with a general digital camera and lighting equipments. After explaining the summary of the image analysis method, we first examine the relationship between the measuring condition and accuracy of strain in the compressive test of concrete specimen by varying the size and arrangement of subset in which the image corralation is evaluated. Then, an effective size and arrangement of subset is investigated to clearly visualize the crack propagation in concrete.
