Study of Single Shear Performance of Nailed Joints for Structural Utilization of MDF II.

Abstract

There are two formulas for the allowable resistance of nailed joints. One is based on the European Yield Theory (EYT) and the other contains the head diameter of the nail as a parameter. In addition, there are a few cases where the behavior of the load rising after yield is considered theoretically. In this paper, we estimated yield and maximum load of nailed joints with MDF. The yield load was estimated by the EYT formula considering the moment generated by nail head rotation. The maximum load was estimated by the existing formula of screw joints considering a “rope effect”. As a result, the estimation accuracy was increased by the improved EYT formula, taking into consideration the moment generated by nail head rotation. It was also shown that the rope effect of nailed joints can be estimated by the formula for screw joints. On the other hand, it was suggested that the bearing strength of the range between the plastic hinge and the tip of the nail might affect the gap of yield strength between the calculated and the experimental values. It was also suggested that, at the maximum load, nail withdrawal strength might be underestimated and nail-head pullthrough strength be overestimated compared to actual values.