高強度コンクリート(材料)/マスコンクリート

[1185] 下水処理施設の延長の長いRC壁における温度ひび割れの数値シミュレーション

AKMAL Adnan¹, HOSODA Akira¹, PHANT. Ngoc², KOUJI Yoshihiro³ (1.Yokohama National University 2.University of Technology and Education, The University of Danang 3.Katsui Construction Co., Ltd.)

キーワード：Long RC walls、 base-restrained RC wall、 sewage treatment plant、 thermal cracking、 FEM thermal analysis、 crack equivalent strain method

This study examines a sewage treatment plant that exhibited many thermal cracks in its walls, resulting in costly repairs. The peripheral wall has the L/H ratio of 17.3, which is quite large compared to the wall-type structures externally restrained in general. Despite the use of a large reinforcement ratio of 0.83% and good construction practices, crack widths up to 0.35mm were observed. The Crack Equivalent Strain module of JCMAC3 is adopted to simulate this behavior. The temperature and cracking analysis results are compared with the actual temperature record, crack width and crack pattern.