Verification of the shear performance of mortise and tenon joints with top and bottom notches at the beam end

Journal of Wood Science

Kei Tanaka¹  Takuro Mori²  Shigefumi Okamoto³  Makoto Nakatani⁴  Nobuhiko Akiyama⁵ 

[1] Faculty of Science and Technology, Oita University;Graduate School of Advanced Science and Engineering, Hiroshima University;Graduate School of Human Life Science, Osaka City University;Miyazaki Prefectural Wood Utilization Research Center;National Institute for Land and Infrastructure Management;

关键词: Glued laminated timber;    Mortise and tenon joint;    Shear performance;    Compression perpendicular to grain;    Splitting;   

DOI  :  10.1186/s10086-021-01979-3

来源: DOAJ

【 摘 要 】

Abstract Shear experiments on mortise and tenon joints with top and bottom notches in the beam end were conducted with the length of the tenon as a variable. In addition, material experiments were performed to investigate the structural performance of the fracture modes of the joint. The experimental results show that when the lower notch at the beam end experiences splitting, the shear forces were identical for different tenon lengths and did not decrease. In addition, the deformation performance of the joint up to yielding was largely due to the compressive deformation perpendicular to the grain of the wood on the sides of the tenon. Based on the theory of the calculation method of the splitting strength of a notched beam, a formula for the splitting strength when the end of the beam is moment-resisting was proposed. It was confirmed that the proposed formula could estimate the shear force that caused the splitting fracture of the lower notch. In addition, the increase in shear force after the lower notch experienced splitting fracture was due to the increase in clamping force of the beam end due to rotational deformation.

【 授权许可】

Unknown