Study of Large Finger Joint Corner Joints with Applied Plywood Component for Intermediate Member

概要

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Wooden frame construction with Large Finger Joints (LFJ) for intermediate member types could be available for middle-rise buildings. The structural performance of this construction would depend on the performance of the intermediate members. In this paper, a plywood laminated component of Karamatsu (Larix kaempferi) was used as the intermediate member. Bending tests of plywood for the vertical direction, shearing tests of plywood and joint efficiency tests of LFJ connecting plywood components with glulam of Karamatsu were conducted to obtain several values to estimate the performance of full scale T-shaped and L-shaped joints. Full scale joint tests showed that the ultimate failure occurred on the LFJ on the plywood component's side. Applying a design method for connections in steel structures to this joint, the estimated strength of the plywood component for shearing was higher than that of LFJ for bending, even though it would have a larger plywood component for heavier timbers. The allowable strength of this joint system could be evaluated from the bending strength of the LFJ of the plywood component.
The Japan Wood Research Societyの論文