普通コンクリートの高温時ひずみに対する加熱速度の影響

概要

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We carried out loaded heat tests about normal strength concrete made of clashed limestone coarse aggregate. Properties of the concrete at high teperatures have been tested previously. In this paper, the results are shown about the test with constant rate of heating and cooling. The rate is 1 ℃/min, 3 ℃/min and 6 ℃/min. Result of these tests has less shrinkage strain than the previous test. But the influence of rate of heating does not appear clearly. Using properties of the concrete at high temperatures tested previously, We try to calculate a strain of concrete at high temperatures with the constitutive model suggested by Anderberg and Thelandersson. In this model, the influence of creep strain at high temperatures is considered. Calculated strain is differ from result of the test shown in this paper in details. The influence of rate of heating on calculated strain is appeaed slightly.
2005-03-20