Durability Ⅰ

[1093] EXPERIMENTAL AND ANALYTICAL EVALUATIONS OF ASR-INDUCED DAMAGE

Yulong ZHENG¹, Kenji KOSA², Nobuo UEHARA³ (1.九州工業大学工学府　建設社会工学科 2.九州工業大学建設社会工学科 3.住友大阪セメントセメント・コンクリート研究所)

Keywords:ASR, simulation experiment, FEM analysis, stirrup fracture, deformations, ASR, 模擬実験, 数値解析, 鉄筋破断, 変形

To estimate the behavior of stirrup, which is significant for the fracture around stirrup due to ASR, specimen with expansive mortar cast into the frame of ordinary concrete is conducted. The ASR-induced circular and elongated deformation as 5.00mm and 3.33mm are generated by the bending and tensile action. Besides, angular increment about 2.0° is verified for corner concrete. This is responsible for the opening deformation of stirrup, being crucial for progress of initial damage until to fracture. By FEM analysis, external deformations in experiment are generally reproduced.