抄録
Plain concrete cylinders were subjected to the temperature gradients from inside to outside surface. The gradients were gradually increased with time. In order to investigate the cracking behaviour of the cylinders, acoustic emission count, outside surface strain and crack formation process were observed. The temperature gradients corresponding to crack formation were larger than the predicted one from elastic solution. The results obtained from finite element analysis suggest that the above behaviour is mainly affected by stress relaxation and Young's modulus descent. In almost of all cases, the twin cracks on opposite side of the cylinder were found. The formation process of the twin cracks can be partially explained from the calculated distributions of stress and displacement.
