700℃までの一定温度下におけるコンクリートのクリープに関する実験的研究

概要

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Under fire attack, temperature of the concrete will become over 300℃. Creep of concrete is accelerated by effect of the high temperature. This paper shows short time creep of cylindrical test specimens and some infomations about creep recovery and time failure of them, by the tests under constant temperature conditions up to 700℃. The concrete was usual strength concrete made of coarse aggregate of limestone. At the tests, six compressive stress level variations were applied. Stress-strength ratio was 0.89 at the maximum. Result of the tests is expressed with creep coeficient. And, according to the creep-time relationship expressed with power function, we suggest a simple mathematical model. This model will be applied for analizations of concrete structures under fire attack with stress-strain relationship at high temperature. Stress-strain relationship at high temperature is avalable in some other investigations.
一般社団法人日本建築学会の論文
2004-03-20