STUDY ON NON-LINEAR CREEP PREDICTION EQUATION OF CONCRETE

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  • コンクリートの非線形クリープ予測式の提案
  • コンクリート ノ ヒセンケイ クリープ ヨソクシキ ノ テイアン

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Abstract

Concrete is considered as an aging linear visco-elastic material. Hence, the creep behavior of concrete under the constant sustained stress is represented by either creep coefficient or specific creep, both of which are based on an assumption of the linear relation between creep strain and externally applied stress. What is in doubt, however, is the upper limit of this relation. In terms of the stress/strenght ratio, an upper limit between about 0.23 and 0.75 has been observed. The purpose of this study is to clarify the nonlinearity of creep strain of concrete under the constant sustained stress. We verify the significant difference among the creep coefficient of concrete which is under the various constant stress level. Furthermore, we propose a non-linear creep prediction equation which can represent the results of creep experiment.

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