BASE ISOLATION STRUCTURE OF BUILDING

摘要

PROBLEM TO BE SOLVED: To provide a base isolation with a simple structure without taking much labor in construction. SOLUTION: In this base isolation structure of building, a base isolation floor T is provided between an upper structural part Ju and a lower structural part Jd. A base isolation device 3 capable of absorbing the relative rolling energy of the upper and lower structural parts is provided in the base isolation floor T. A stairway part K capable of being hoisted through the base isolation floor T is provided through the upper structural part Ju and the lower structural part Jd. The stairway part K is formed by providing an upper stairway part Ku supported on the upper structural part Ju and a lower stairway part Kd supported on the lower structural part Jd through a stairway cutting part 10 allowing the lateral movement of the upper structural part Ju and the lower structural part Jd due to the relative rolling thereof. A structure cutting part 8 allowing the lateral movement of the upper structural part Ju and the lower structural part Jd due to the relative rolling thereof is provided between the upper structural part Ju and the lower structural part Jd. The stairway cutting part 10 is disposed flush with the structure cutting part 8.