STUDY ON TRANSIENT THERMAL CREEP OF CONCRETE : Evaluation of thermal stress of concrete under constant compressive strain

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  • コンクリートの遷移温度クリープ性状に関する研究 : 一定の圧縮ひずみ作用下におけるコンクリートの熱応力評価
  • コンクリート ノ センイ オンド クリープ セイジョウ ニ カンスル ケンキュウ イッテイ ノ アッシュクヒズミ サヨウ カ ニ オケル コンクリート ノ ネツ オウリョク ヒョウカ

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It is said that transient thermal creep of concrete develops only during the first heating process. This means that thermal stress of concrete is reduced by transient thermal creep during heating, but during cooling process, concrete can be subjected to large tensile stress because of no reduction of thermal stress by transient thermal creep. Therefore, some experiments was conducted to evaluate the thermal stress of concrete accurately, using concrete specimens under constant compressive strain subjected to temperatures up to 80℃ with different heating rate. The thermal stress of concrete derived from the experiments was evaluated by the coefficient of thermal expansion including transient thermal creep. Consequently, the evaluated stress was in good agreement with the experimental results.

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