EVALUATION OF CORROSION CRACK BEHAVIOR OF REINFORCED CONCRETE BY DIGITAL IMAGING CORRELATION METHOD

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  • デジタル画像相関法による鉄筋コンクリートの腐食ひび割れ発生挙動の把握

Abstract

<p> Reinforced concrete structures located in the coastal area are affected by rebar corrosion caused by salt attack. Evaluation of residual performance is important to maintain and manage these structures. Although the structural performance and durability performance of the structure strongly depend on the presence or absence of corrosion of the rebar and the amount of corrosion reduction. Since the inspection required for deterioration diagnosis is visual inspection is standard, if it is possible to estimate the amount of corrosion of rebar directly under the cracked part by the opening width of the corrosion crack presented on the concrete surface, it contributes to advanced maintenance and management It is considered to be a thing.</p><p> In this research, we experimentally grasp the change of deformation field of RC member cross section at the progress of rebar corrosion in RC by digital image correlation method. Furthermore, the analysis of corrosion expansion of rebar by damage model based on fracture mechanics developed in recent years, and the reproducibility of the deformation field of concrete by the analysis is examined.</p>

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