Study on distributed strain measurement and crack detection in RC beam specimen using optical fiber sensor

Abstract

Cracks are one of the important inspection items to keep concrete structures safe. In recent years, a method using an optical fiber sensor has been proposed as a method for efficiently measuring distributed strain over a wide area, and this method is suitable for large-scale concrete structures. Therefore, this study investigated the characteristic of the distributed strain for RC beam specimen using three types of measurement methods and two types of optical fiber sensor. Finally, we compared the strain measurement results and determined the cracks from strain measurement results.