Development of a joint system using a compressed wooden fastener II: evaluation of rotation performance for a column-beam joint

In the present study, a plate and a doweled fastener made of compressed wood (CW) were newly introduced into a moment resisting column-beam joint system for a small portal frame structure. A mechanical model that contains not only an axial spring, but also a rotational spring, considered resistant factors to verify how each element resists rotation. Theoretical performance was compared with experimental data. Consequently, the mechanical model was shown to be suitable and the combination of resisting factors was found to be very effective; i.e., the rotational spring provides more influence on the stiffness and moment compared with the axial spring. Large moment and ductility can be achieved by virtue of the high embedding performance of the CW plate in the rotational spring, accompanied with the high shearing performance of the CW dowel in the axial spring.