Basic study on single shear bolted connections applicable to buckling-restrained braces

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K20471
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0304:Architecture, building engineering, and related fields
• Research Institution: Hokkaido Research Organization
• Principal Investigator: TAKASHIMA Masato 地方独立行政法人北海道立総合研究機構, 建築研究本部 北方建築総合研究所, 研究職員 (60964054)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: 鋼構造 / 座屈拘束ブレース / 接合部 / 偏心 / 圧縮載荷試験

Outline of Final Research Achievements

In this research, a new single-shear bolted connections for buckling-restrained braces are proposed to reduce the amount of steel and improve workability. In the proposed connections, rib-plates are attached eccentrically to coincide the brace axis with the gusset plate axis. In order to quantify the structural performance of the proposed single-shear bolted connections, axial compressive loading tests are conducted, and it is confirmed that the proposed new single-shear bolted connections has the same compressive strength as the conventional double-shear bolted connections. The amount of steel and the cost of the proposed single-shear bolted connections and double-shear bolted connections are calculated. It is confirmed that the amount of steel and the cost for the proposed single-shear bolted connections is less than that of the double-shear bolted connections.

Free Research Field

建築構造学

Academic Significance and Societal Importance of the Research Achievements

近年、建築物の耐震性・安全性を確保しながら施工の合理化を行い、省資源化と低コスト化を達成していくことが求められている。特に、鋼構造部材は製造時に多くのCO2を排出するため、使用量の削減が必要である。本研究では、提案する新しい一面摩擦接合形式が、従来の二面摩擦接合形式と比較して、同等の圧縮耐力を有することと、鋼材量とコストを削減できることを示した。提案する一面摩擦接合部は座屈拘束ブレースに適用できる可能性が高いと考えられ、これが実用化されれば、施工の簡略化と鋼材量の削減に大きく貢献できる。