LAMINATED PLATE ISOLATOR HAVING DAMPING FUNCTION, AND BASE ISOLATION STRUCTURE BED USING THE ISOLATOR

PROBLEM TO BE SOLVED: To lighten oscillation of a structure by using one kind of a base isolation member, prevent deformation and collapse of a structure even when it is subjected to a strong wind and a large earthquake, and easily construct a base isolation structure of every kind of structures. SOLUTION: This lamination plate isolator 1 having a damping function is so constructed that plural hard plates 5 and soft plates 6 are alternately stacked to form a column-like composite laminated body 4 between an upper plate 2 and a lower plate 3, a column-like hollow part 7 piercing the composite laminated body 4 is formed in the interior of the composite laminated body 4, a die 9 having a fit-in hole 9b and a fitting rod 10, the tip of which is movably fitted in the fit-in hole 9b are disposed in the hollow part 7, and spherical bearing parts 9c, 10b provided on the base ends of the die 9 and the fit-in rod 10 are respectively rotatably supported on the spherical bearing seats 11, 13 provided on the upper plate 2 and the lower plate 3. The base isolation structure bed is so constructed that a frame 21 having slab-rigidity is supported by the laminated plate isolator 1 installed on the foundation and every kind of structures are constructed on the frame 21.