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Official Journal of the Japan Wood Research Society

Shear creep and mechanosorptive behavior of nail-plate-jointed laminated-veneer lumber


The objective of this research was to evaluate the mechanosorptive deflection of shear creep of nail-plate-jointed laminated-veneer lumber. The joint was composed of steel gusset and nails, 40 mm in length and 2.8 mm in diameter (Zn40). The specimens were loaded parallel (PA) and perpendicular (PE) to the grain. Shearing loads applied were 50 and 100kgf, and the load levels were 11% and 22% (PA) and 7% and 14% (PE) of the maximum strength obtained from static testing. The creep test specimens were loaded for 1500h. A few general conclusions could be drawn from this study: The mechanosorptive deflection (σms) is defined as σms = σt — (σc + σsh) — σo, where σt, is total deflection, σc is pure creep, σsh is shrinkage-swelling behavior, and σo is the initial deflection. Changes in relative humidity may cause more severe creep deflection than constant humidity, especially during the drying process. The mechanosorptive deflection is greater at the lower load level than that at the higher load level. The mechanosorptive effects seem to be somewhat more resistant in the parallel direction than in the perpendicular direction.


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Hong, SI., Arima, T. Shear creep and mechanosorptive behavior of nail-plate-jointed laminated-veneer lumber. J Wood Sci 44, 186–190 (1998).

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