STUDY ON THE PREDICTION FORMULA FOR TIME-DEPENDENT STRAIN OF CONCRETE : Prediction formula of total creep strain

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  • 国内の実験データに基づいたコンクリートの時間依存性ひずみの予測式に関する研究 : クリープひずみの予測式
  • コクナイ ノ ジッケン データ ニ モトヅイタ コンクリート ノ ジカン イゾンセイヒズミ ノ ヨソクシキ ニ カンスル ケンキュウ クリープヒズミ ノ ヨソクシキ

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Abstract

In this paper, the prediction formula of total creep strain of concrete with a normal to high strength concrete was discussed using the test data published in Japan. The proposed model was expressed as the product of two terms; one is the creep parameter that is expressed in terms of the product of four coefficients taking into account of mix proportions, age at loading, relative humidity and the effect of specimen size, the other the time-effect function with no finite limit (logarithmic function). It was found that the proposed prediction formula can estimate the total creep strain more accurately than the other formulas such as JSCE, CEB-FIP 1990 and ACI209.

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