Single Shear Properties and Deformation Behavior of Nailed Joints Using Various Structural Panel Materials

Abstract

With the recent concern toward wood utilization in large-scale structures, increasing the strength performance of structural elements is important. Developing structural elements using board materials is one of the measures to increase the strength performance. A high-performance nailed joint to resist shear loading is necessary to increase the strength performance of wooden structural elements using board materials. This study was conducted in order to understand the shear properties of nailed joints intended for large-scale structures. Shear tests were conducted with nailed joints using structural plywood, medium density fiberboard, or particleboard. The yield resistance was determined from experimental load-slip displacement curves, and was also calculated using European yield theory (EYT). Consequently, the nailed joint specimens using MDF showed an experimental yield resistance higher than those using structural sugi plywood. The nailed joint specimens using PB also showed a high value similar to that of the joints using structural karamatsu plywood. The yield resistance of most of the joint specimen series calculated using European yield theory showed slightly higher values than the experimental yield resistance. This study observed the deformation behavior around the nail head under shear loading. No deformation was observed from the appearance at the initial region of the test. The nail head started a rotational deformation when the joint started yielding. Moreover, the side panel became partially embedded. The nail head was completely embedded at the maximum load of the specimen. Nail pull-out from the base material was not remarkably evident. This deformation behavior was observed in all the board materials used in this study.