| 摘要 |
PURPOSE:To provide a supporting structure that reduces the stress due to the loading by an earthquake as well as the thermal stress by adopting a sliding key structure at one end of a supporting member that supports the upper part of the outer cylinder and the adjacent inner cylinder, and by providing either one of the inner or outer cylinder with a stopper in the axial direction of cylin der. CONSTITUTION:An upper supporting member 4 that supports the upper part of the outer cylinder 1 and the inner cylinder 2 has at its one end a sliding key structure 10 in order to reduce the thermal stress. Further, by providing the inner cylinder with a stopper 9 in its axial direction, and by leaving a gap between the stopper 9 and the outer cylinder 1 to allow a thermal displacement, the load can now be distributed, which would otherwise have concentrated on the upper supporting member 4 when an external force such such as an earthquake is applied. The stopper 9 may separately be disposed in multiple places, and can be placed on the outer cylinder side 1 in stead of the inner cylinder side 2. |
