Graduate Thesis Or Dissertation
 

Model for the prediction of nail withdrawal stiffness

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/1v53k2796

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  • An important factor affecting the strength and ultimate load of wood structures is the strength, stiffness and durability of its joints. Therefore, the behavior of nailed joints must be given proper consideration when designing and analyzing wood structures. Presently,formulas for determining the strength of nailed joints under withdrawal loads, as outlined in the National Design Specifications and the Uniform Building Code, are based on the statistical regression between maximum withdrawal load (W) and the material properties of the wood and nail.New models were developed which predict W, withdrawal resistance (WR) and withdrawal stiffness (WK) based on the actual forces responsible for holding the nail in the wood. These include a normal force to the nail due to the elastically compressed wood around the nail and the resulting friction between the wood and nail surfaces. The accuracy of these models were compared to the accepted formulas in the design codes and were found to be superior in predicting W, WR and WK.
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