2025 Volume 71 Issue 3 Pages 101-110
In drift-pin joints with slotted-in steel plates, a staggered arrangement of drift pins can potentially reduce the joint size. Sufficient staggered widths and fastener spacings that prevent brittle behavior under shear loading must be clarified. In this study, a double-shear test was conducted under various staggered arrangements of drift pins, primarily focusing on the ductility. Ductile behavior was observed when the fastener spacing was six times the fastener diameter or greater. Furthermore, brittle behavior was observed at five times the diameter under conditions with small staggered widths. When the spacing was 3.5 times, all the configurations exhibited brittle behavior regardless of the staggered width. Additionally, an attempt was made to numerically express the arrangement conditions using ellipses in a planar coordinate system, and a simplified method was proposed to ensure the deformation performance. These findings are valuable for joint designs.
