破壊力学／既存構造物の調査／維持管理・ライフサイクルⅠ

[2222] VISUALIZATION OF CORRODED STEEL BARS IN RC BEAMS USING DIGITAL IMAGE PROCESSING OF X-RAY PHOTOGRAMS

座長(土木)：中村光
座長(建築)：楠浩一
講演者：Sopokhem LIM¹, Haitao JIANG¹, Takehiro OKAMOTO¹, 秋山充良² (1.Waseda University, Departoment of Civil and Environmental Engineering 2.Waseda University, Departoment of Civil and Environmental Engineering)

キーワード：RC beam, spatial variability, steel weight loss, surface crack width, X-ray technique, digital image processing

The structural performance of deteriorated RC structures in chloride-contaminated environments depends strongly on local conditions of corrosion-damage reinforcement. Corrosion-induced surface cracking is the only key visible indicator that indicates steel corrosion inside RC members. Therefore, it is crucial to study the spatial variability of steel weight loss in relation to corrosion cracking. This paper demonstrates applications of X-ray techniques and digital image processing to continuously observe the spatial variation of steel weight loss and its relationship with surface crack widths.