超高層RC制振「TASS-Flex® FRAME」の開発と適用
近年発生が危惧されている長周期・長時間地震動の対策技術として，超高層RC造住宅の揺れを効果的に低減できる新しい制振システム「TASS-Flex® FRAME」を開発した。本システムを成立させるには，地震時の応答特性の把握，ダンパー取付け部の耐久性の確認，連層壁脚部の半剛接合の設計，本体建物と連層壁との接合など，諸々の課題が存在する。これらの課題を解決し，実際の建物にTASS-Flex® FRAMEを適用するに至った。
そこで，これまでに行った実験や解析，実施設計時の検討の内容を報告する。①地震時に建物の応答を大幅に低減できること，②オイルダンパーの接合部が十分な耐久性を有していること，③連層壁脚部が十分な余裕度を有していること，④境界梁により本体架構と連層壁との間で力を伝達できることを確認した。
キーワード：超高層建物，制振，連層壁，長周期地震動，振動台実験
＊１ 技術センター 都市基盤技術研究部 防災研究室
＊２ 設計本部 構造設計第三部
＊３ 技術センター イノベーション戦略部 技術開発戦略室
＊４ 設計本部 工事監理部
Development and Application of High Damping Structural Response System for High-Rise RC Building "TASS-Flex® FRAME"
The authors have developed TASS-Flex® FRAME, a new damping system that is effective in protecting high-rise reinforced concrete (RC) buildings from long period-long duration ground motions, about which there has been growing concern in recent years. To realize this system, various challenges need to be addressed, such as identifying seismic response characteristics, validating the durability of oil damper mounts, designing the semi-rigid joints at the bottom of the multi-story wall, and detailing the connection between the main building frame and the multi-story wall. With these challenges having been resolved, the system was successfully applied to an actual building. This paper reports on the experiments and analyses that have been conducted thus far and the studies at the design development stage. This study showed that (1) the system significantly reduces the seismic response of a building, (2) the oil damper mounts have adequate durability, (3) the bottom of the multi-story wall has an adequate margin of safety, and (4) the boundary beams can transfer force between the main building frame and the multi-story wall.
Keywords: high-rise building, vibration control, multi-story wall, long-period ground motion, shaking table test
*1 Disaster Prevention Research Section, Urban Engineering Research Department, Taisei Advanced Center of Technology
*2 Structural Engineering Department III, Design Division
*3 Research and Development Strategy Section, Innovation Strategy Department, Taisei Advanced Center of Technology
*4 Construction Supervision Department, Design Division