Collapse loads of drift pin timber joints loaded perpendicular to the grain, 2
2001
Tsujino, T. (Iwate Univ., Morioka (Japan). Faculty of Education) | Takeuchi, N. | Kawai, T.
In our initial report1) it was shown that collapse loads of drift pin joints loaded perpendicular to the grain were generally predicted by Rigid Body Spring Model (RBSM) provided the drift pin was not deformed and friction between the drift pin and the boundary of its hole was negligible. However, when both end and edge distance were large, correlation between experimental and theoretical values was not good. Therefore we made two adjustments as following : (1) In the mesh division, we assumed a characteristics distance of 3 mm for the tensile strength perpendicular to the grain of 3.43 MPa. (2) In the numerical modeling of the drift pin, we used a chevron boundary element instead of the bar element. To verify the validity of the present method, we compared its numerical results with the previous experimental data as follows: (a) End drift pin joint type with lateral load on specimen, as used in our previous study, (b) Center drift pin joint type with tensile loads. As a result, the compatibility between present and experimental values was improved for joint type (a) of the previous study, and the result of the present method agreed well with the experimental values for joint type (b). Therefore the numerical analysis using RBSM of this report should be useful to predict the collapse load of drift pin joints loaded perpendicular to the grain.
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