インフラ構造物に作用する応力の見える化

― ひずみ可視化シート ―

抄録

In order to realize visualization of stress acting on infrastructures, the authors developed “Strain Visualization Sheet” based on the principle of Moiré fringes. Strain Visualization Sheet is a revolutionary device which makes it possible to check strain values with the naked eye, and also enables highly precise measurements of strain values by using an ordinary digital camera. As an additional advantage, it is not necessary to provide an electrical power source for the device. In addition, Strain Visualization Sheet is a self-temperature compensated device, it is unaffected by temperature during strain measurements of the concrete and steel materials used as construction materials in infrastructures, and strain measurement with an accuracy of > 20 με is possible. As Strain Visualization Sheet is low in cost and enables any user to grasp the stress acting on infrastructures in a simple manner, we are confident that it can make an important contribution to operation and maintenance (O&M) of infrastructures in the future.