Study on ductility evaluation for glulam bracing shear wall with steel-plate-inserted joint

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14881
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: National Institute for Land and Infrastructure Management
• Principal Investigator: AKIYAMA NOBUHIKO 国土技術政策総合研究所, 建築研究部, 主任研究官 (20806054)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 集成材 / 鋼板挿入ドリフトピン接合 / ブレース耐力壁 / 靭性能 / 割裂補強

Outline of Final Research Achievements

We proposed the reinforcing method with full-thread screws to prevent the splitting failure and for the drift-pinned joint with inserted steel plate of the brace end, which yields precedently the glulam frame members of the shear wall to absorb the seismic energy. We conducted the cyclic loading tests to find that the plastic deformability of the joints was improved by the reinforcement of full-thread screws. In addition, we developed the calculation method for the characteristic values of load-deformation relationship of the glulam bracing shear wall used the drift-pinned joints with inserted steel plate reinforced with full-thread screws to clarify the influence on the properties of the shear wall by the variation of the section, the angle or the length of the brace.

Free Research Field

木質構造

Academic Significance and Societal Importance of the Research Achievements

鋼板挿入式集成材ブレース耐力壁は大型木造建築物に対して標準的に導入される耐震要素であるが、本研究の成果であるブレース端の接合部においてこれまで課題となっていた割裂破壊が抑制され終局時の耐力と変形性能が確保される仕様とそれを適用したブレース耐力壁の靭性能評価方法の活用によって、大型木造建築物の構造安全性確保に寄与し脱炭素社会の実現のための木材利用促進に貢献するものと考えられる。