Research on Creep Test for Reinforced Concrete Frame Structure

The fire tests included fire load and fire temperature had been conducted to twelve reinforced concrete frame structures with ISO834 standard heating up curve. Furthermore, the creep tests had also been done under room temperature to the above twelve structures after cooling and one structure which with the same shape and size but had not undergone the fire test. According to the creep data, the creep curves of each specimen were obtained, the rheological properties of the structures after fire tests were simply discussed as well. The experiments showed that the fire temperature effect on the specimen was larger than the fire load, the higher temperature the specimen suffered, the more it looked like a standard creep curve. When the fire temperature was 600˚C, only the first two stages (the initial creep stage and the steady creep stage) of the creep behavior were obtained. While the third stage (the accelerated creep stage) were clearly presented when the fire temperature was 1000˚C.