Moment Resisting Performance of Wedged and Halved Scarfed Joints, Okkake-Tsugi

Abstract

In this study, we tested for identifying dimensional effects of rotational stiffness of wedged and halved scarfed joint. At first, a model of stress distribution in bending was made from observation of joints fracture under four-point bending tests. Proposal of rotational stiffness design formula(M �) was derived from this model. Under the tests, M � equation values well corresponded to all types of experimental ones. In particular, rotational stiffness rose in proportion to the cube of the materials height and the cogging width and had asymptotic limit value. These tendencies corresponded to the experiment results.

Failure modes in halved and tabled tenoned timber scarf joint by tension test

“…They studied joint strength, considering oblique and straight keys, as well as the influence of bolts. Kobayashi [13,14] analysed the behaviour of halved and tabled tenoned scarf joint without a key and subjected to bending. Using an analytical calculation method he obtained the strength and rotational stiffness of the joint in the plastic region, obtaining good fits with experimental values.…”

Análisis experimental y por el método de los elementos finitos del estado de tensiones en uniones carpinteras de empalme de llave

“…Realiza ensayos experimentales con empalmes biapoyados, colocados de canto, sobre los que aplica 2 cargas puntuales provocando la flexión. Mediante un método de cálculo teórico, obtiene la resistencia a la fractura y la rigidez rotacional de la unión en la región plástica, consiguiendo buenos ajustes con los valores experimentales (Kobayashi et al, 2010;Kobayashi et al, 2012).…”