マスコンクリートの熱変形および熱応力に関する実験的研究

抄録

The effect of external restraint is one of the most important factors in discussing the mechanism of the thermal stress in massive concrete. From the results of recent theoretical investigations, relative displacement in both horizontal and vertical direction is suggested to be occurring at a joint of restrained concrete and restraining body such as rock or soil or even old concrete cast sometime ago before the casting of new concrete. These phenomena, however, have not confirmed by experimentally. In this paper, it was shown that the results of the thermal stress experiment with large scale massive concrete specimens were made having two parts, the base and wall on it. Each specimen has the different rigidity at its joint. The thermal deformation of these specimens was observed with high sensitive displacement meter, and the above mentioned phenomena were confirmed. The relationship between thermal deformation and rigidity of a joint was discussed based on the results of this experiment.