2021 Fiscal Year Final Research Report
Development of structural-design methodology for tow-way rigid frame composed of hybrid steel rebar-timber glulam members
| Project/Area Number |
19H02290
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 23010:Building structures and materials-related
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 木質ハイブリッド部材 / 集成材 / 鉄筋 / 柱 / 梁 / 接合 / 損傷抑制 / 大地震 |
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| Outline of Final Research Achievements |
The study develops a design technique for calculating the critical load capacity of large-scale timber lamellae using wood hybrid reinforced laminated timber, which exhibits structural performance equivalent or superior to that of reinforced concrete or steel-framed structures. The species of glued laminated timber is fast-growing cedar. Reinforcing bars are inserted into the axial direction of the timber at the bending edges of the glued laminated timber and glued into the glued timber using epoxy resin adhesive. This increases the bending stiffness of the cedar glued-laminated timber by a factor of 4-5 and reduces the beam depth to about 60% of that of the conventional timber, while also increasing the bending strength. In this work of study, column, beam, column-beam connection, and the thermal and fire resistance have been investigated experimentally and analytically.
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| Free Research Field |
建築構造
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| Academic Significance and Societal Importance of the Research Achievements |
我が国では住宅・建築分野が二酸化炭素量の3割を排出し、セメントや鋼の生産の排出を加えると4割に及ぶ。建築材料・構造分野でもカーボンニュートラルに対応する新たな社会基盤への貢献が求められている。セメントと鋼は不可欠であるが、今後は構造部材を、CO2吸収を伴う自然循環により生み出される木質材料に転換させる技術を開発する必要がある。建築計画と設計へ自由度を与え、地球環境と調和する木質の柱・梁及び構造システムの構築が極めて重要である。 既存の木質構造では限界がある。その転換を加速させることを狙いに、本研究は木質ハイブリッド軸材と、その構造システム及び設計方法の開発を目指している。
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