MATEC Web Conf.
Volume 258, 2019International Conference on Sustainable Civil Engineering Structures and Construction Materials (SCESCM 2018)
|Number of page(s)||8|
|Section||Structural Dynamics and Earthquake Engineering, Structures in Severe Environment, Structural Analysis|
|Published online||25 January 2019|
Image analysis on the flexural behaviors of RC beams with artificial damage and the effects of repair
1 Hokkaido University, Graduate School of Engineering, Kita 13 Nishi 8, Kita-ku, Sapporo, Japan
2 Hokkaido University, Faculty of Engineering, Kita 13 Nishi 8, Kita-ku, Sapporo, Japan
3 Civil Engineering Research Institute for Cold Region, 1-3 Hiragishi, Toyohira-ku, Sapporo, Japan
* Corresponding author: email@example.com
In cold and snowy regions, frost damage happened in an RC bridge deck slab leads to horizontally layered cracks, which results in the disintegration of cover concrete. Since this deterioration mode occurs inside an RC slab, it is usually difficult to detect them. It is possible that the slab performances have already decreased when the deteriorations appear on the exterior surface. As a preliminary step towards the establishment of a method for evaluating the structural performance of such a damaged RC slab, the purpose of this paper is to investigate the relationship between deteriorations and structural behaviors and to study the effect of an epoxy injection repair. For simplification, RC beams are prepared with artificial cracks that simulate deteriorations and these were made by the use of expansive agent. These beams are tested in flexure. Since the damage is volumetric, image analysis is useful to capture the two-dimensional deformations. It is shown that with different deterioration depths that is a part of the compression side of the beam or full of the height, there are differences about the deformation behaviors, the repair effects and the distributions of maximum and minimum principal strain.
© The Authors, published by EDP Sciences, 2019
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