Study on measurement method of strain distribution of the concrete inside based on stress release by core drilling

Abstract

In order to estimate potential deterioration conditions such as alkali-silica reaction, it is necessary to evaluate the strain distribution concrete inside properly. To evaluate the strain distribution, core drilling experiments using the stress release method were conducted on concrete specimens. In the experiments, the eccentric load was applied, and the strain was measured by the embedded sensor. Moreover, the stress analysis was performed and the results were compared with the experimental results. As a result, it was confirmed that the embedded sensor can measure the strain distribution of the concrete inside. Furthermore, it was confirmed that the accuracy of the elastic strain was improved by applying the expansion strain of the mortar.