N12345ABHICDEFG建築主：三嶋大社所在地：静岡県三島市主要用途：神社設計施工：竹中工務店・設計：井上博明・松波圭亮・木俣洋子・構造：望月英二・設備：友井篤・作業所長：酒井康成伊豆國一宮である三嶋大社の舞殿の耐震補強を主とした改修計画である。境内の中央に位置する舞殿は、三島市指定文化財であるとともに季節の伝統祭事も執り行われるため、既存の外観や主構造を極力変えない計画とした。新たな構造体として、柱を挟み込んでボルト固定した矩形状の長押、基礎の増強、地貫のやりかえ、火打梁の追加など意匠に影響の少ない部分を補強して耐震性を高めた。木製の外部引戸は開け放した際、舞殿の四隅で建具枠が同面で納まるようにそれぞれの建具の幅を調整した。長押・建具・階など新たに追加した木材の仕上はクリア塗装とし、新旧の木肌を素直に見せた歴史を折り重ねる外観を目指した。手摺のディテールや内部の照明計画は現代的な意匠を採用し、過去と現在を繋ぐ工夫を行った。時代ごとの新しい変化を取り入れながら使い続けていく伝統木造の本来の在り方を体現し、時代を超えても変わらない価値を持つ建築を目指した。（松波 圭亮 ＋ 木俣 洋子）Works建築面積：57.19㎡延床面積：57.19㎡構造：木造階数：地上1階工期：2020.1〜2020.8PLAN S=1:350Owner: Mishima TaishyaLocation: Mishima-shi, Shizuoka Main Use: ShrineDesign and construction work: Takenaka Corporation·Architects: Hiroaki Inoue, Keisuke Matsunami and Yoko Kimata·Structural: Eiji Mochizuki·M&E: Atsushi Tomoi·Site manager: Yasunari SakaiSECTION S=1:350This was a renovation project mainly for seismic strengthening of the Buden Hall of Mishima Taisha, the Ichinomiya of the former Izu Province.Located in the center of the site, the Buden is a Mishima City designated cultural asset, and traditional seasonal festivals are held there, so the plan was to conserve the existing external appearance and main structure as much as possible.The seismic resistance was increased by strengthening parts with new structural members having little effect on the design, such as rectangular tie beams fitted around columns and fixed with bolts, strengthening foundations, replacement of tie beams at the base of columns, addition of diagonal braces placed at corners, etc.The width of the various fittings were adjusted so that when the timber exterior sliding doors were opened, the frames were maintained coplanar with the four corners of the Buden. New timber members that were added, such as tie beams, joinery, floors, etc., were finished with clear paint, with the aim of achieving an external appearance that embraced its history and genuinely showed the old and new timber surfaces. Modern design was adopted for the handrail detailing and internal lighting scheme, thereby linking past and present. The aim was to provide a building with unchanging value throughout the ages, that embodies the original methods of traditional timber construction that continue to be used, while incorporating new changes in each age.(Keisuke Matsunami, Yoko Kimata)26新しい変化を重ねる伝統木造建築Traditional Timber Building Incorporating Many New ChangesBuilding area: 57.19m2Total floor area: 57.19m2Construction: WoodNumber of stories: 1 floor above groundConstruction term: January 2020 to August 2020三嶋大社舞殿Mishima Taishya buden
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