Study of Shear Creep Performance in Parallel to the Grain Direction of Wood

Abstract

It is increasing to utilize the high-strength connection with the shear performance of wood for timber structures. However, it doesn't have enough data to understand the shear performance of wood, especially, in the long-term. In this study, the long-term performance of timber was investigated using the developed tensile shear test method. The creep and creep limit tests were conducted for long-term shear performance in parallel to the grain. Both tests were loaded at 30-80 % load levels, and the strength modification factors and the deformation modification factors were calculated. The initial deformations of long-term loading tests were equivalent to those of control shear tests. The strength modification factor calculated from the creep limit tests was considered to be 60-70%. The deformation modification factors calculated from the creep tests were well above 2 for both the Japanese building standard law and the power law.