2023 Fiscal Year Final Research Report

Development of higher seismic and fire-resistant timber slender frame structure using eco-friendly and sustainable materials

Research Project

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Project/Area Number	21H01481
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 23010:Building structures and materials-related
Research Institution	Osaka Metropolitan University (2022-2023) Osaka City University (2021)
Principal Investigator	Taniguchi Yoshiya 大阪公立大学, 大学院工学研究科, 教授 (30254387)
Co-Investigator(Kenkyū-buntansha)	Sanjay PAREEK 日本大学, 工学部, 教授 (20287593) 荒木慶一名古屋大学, 環境学研究科, 教授 (50324653) 石山央樹大阪公立大学, 大学院工学研究科, 准教授 (90634436) 鈴木裕介大阪公立大学, 大学院工学研究科, 准教授 (90635400)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	木質構造 / 高耐震 / 高耐火 / 低環境負荷 / ジオポリマー
Outline of Final Research Achievements	This research clarify the structural characteristics and fire resistance performance of timber composite members coated with cedar timber with geopolymer mainly based on industrial by-products such as coal ash. Firstly, the fire resistance performance of the proposed members was examined. A combustion test was performed with targeting a quasi-refractory time of 45 min at 900 °C. The residual compressive strength after combustion was measured to demonstrate the high fire resistance performance of the proposed member. Next, the structural characteristics of the proposed members were examined using a static bending loading test. Consequently, the proposed member had 1.5 to 2 times the bending strength and stiffness compared with the nonreinforced member. The calculated bending strength and stiffness of the proposed members, assuming complete adhesion between the timber and the geopolymer, were consistent with the experimental values.
Free Research Field	建築構造学
Academic Significance and Societal Importance of the Research Achievements	木質構造建築物を対象としたこれまでの研究は，耐震性又は耐火性改善といったいずれかに特化してきた。これに対し本研究では，耐震性能と耐火性能を同時に改善可能、持続性の高い天然資源（木材）と産業副産物（ジオポリマーの材料：スラグ，石炭灰）の有効利用による低環境負荷、小断面化・大スパン化による設計自由度の拡大（意匠性の向上）、並びに、間伐材を母材として検討することによる木材利用促進、などといった効果を複合的に達成しうる新しい木質複合部材及び構造システムの開発となる。