SEISMIC BASE ISOLATION STRUCTURE WITH VIBRATION CONTROL FUNCTION

摘要

PROBLEM TO BE SOLVED: To provide a seismic base isolation structure including vibration control function showing a superior vibration control function at an upper floor of a high rise building.SOLUTION: This invention relates to a seismic base isolation structure 1 with vibration control function comprising a seismic base isolation device 4 arranged between the ground and a structure 3 to support the structure and remove vibration of the structure in a horizontal direction H in respect to the ground; vibration control means for controlling vibration of the structure in a horizontal direction H in respect to the ground; and a supporting block 6 fixed to the ground. The vibration control means comprises a plurality of mass dampers 5 constituted by a mass body 5a contacted with the upper surface of the supporting block at its lower surface and movably supported under a low friction in a horizontal direction on the supporting block; resilient bodies 5b each of which is connected at one end to the structure and at the other end to the mass body in such a way that the mass body is vibrated in a horizontal direction through resilient extension or shrinkage in response to a vibration of the structure in a horizontal direction in respect to the supporting block; and vibration energy absorbing means 5c each of which is connected at one end to the structure and at the other end to the mass body so as to absorb vibration energy in response to the vibration of the mass body in a horizontal direction in respect to the supporting block.SELECTED DRAWING: Figure 1