BASE ISOLATION STRUCTURE

• Main Authors: SUGA TAKAYUKI, SATO TAKENARI
• Format: Patent
• Language: English; Japanese
• Published: 18.04.2024
• Subjects: BLASTING; BUILDING; BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; ENGINEERING ELEMENTS AND UNITS; FENCING; FIXED CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MASTS; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; SHOCK-ABSORBERS; SPRINGS; SWIMMING OR SPLASH BATHS OR POOLS; TENTS OR CANOPIES, IN GENERAL; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a base isolation structure capable of reducing additional bending moment generated at a pile head due to horizontal deformation of a base isolation device.SOLUTION: A base isolation structure has a plurality of pile bodies 2, a first upper footing 311 (upper foundation) of an upper structure capable of being relatively displaced to the pile body 2 in a horizontal direction, a first steel girder 71 that extends in a first horizontal direction and is installed on the first upper footings 311 adjacent in the first horizontal direction, a second steel girder 72 that extends in a second horizontal direction and is installed on the first upper footings 311 adjacent in the second horizontal direction, and a sliding bearing 4 disposed between the plurality of pile bodies 2 and the first upper footings 311. The first upper footing 311 is disposed at an intersection between the first steel girder 71 and the second steel girder 72 and has a steel angle brace 8 (load support beam), which is disposed to surround the intersection, connected to the first steel girder 71 and the second steel girder 72, and reinforces the first upper footing 311, and concrete 313 to embed the intersection and the steel angle brace 8.SELECTED DRAWING: Figure 3 【課題】免震装置の水平変形によって杭頭に生じる付加曲げモーメントを低減できる免震構造を提供する。【解決手段】複数の杭体２と、杭体２と水平方向に相対変位可能な上部構造体の第１上部フーチング３１１（上部基礎）と、第１水平方向に延び第１水平方向に隣接する第１上部フーチング３１１に架設される第１鉄骨大梁７１と、第２水平方向に延び第２水平方向に隣接する第１上部フーチング３１１に架設される第２鉄骨大梁７２と、複数の杭体２と第１上部フーチング３１１との間に設けられるすべり支承４と、を有し、第１上部フーチング３１１は、第１鉄骨大梁７１と第２鉄骨大梁７２との交差部に配置され、交差部を囲むように配置され第１鉄骨大梁７１および第２鉄骨大梁７２と接合され第１上部フーチング３１１を補強する鉄骨火打梁８（荷重支持梁）と、交差部および鉄骨火打梁８を埋設するコンクリート３１３と、を有する。【選択図】図３