湿度对胶合木销槽承压强度的影响试验

为了研究湿度对胶合木销槽承压强度的影响，选取湿度分别为50%，70%，90%，木材纹理方向分别为顺纹、斜纹、横纹的45个胶合木试件进行销槽承压强度试验，并将试验结果与各国规范公式计算结果进行比较。结果表明:试件销槽承压破坏模式与胶合木纹理方向有关；相对湿度线性增长时，销槽承压强度与试件初始刚度呈现非线性下降趋势；根据规范公式计算的试件销槽承压强度与试验值吻合度较差，需要进一步优化现有规范公式。

Experiment on Effect of Humidity on Dowel Bearing Strength of Glued Laminated Timber

In order to study the effect of humidity on dowel bearing strength of glued laminated timber, 45 specimens of glued laminated timber including three kinds of humidity (50%, 70% and 90%) and three kinds of grain direction (longitudinal grain, diagonals grain, horizontal grain) were chosen in dowel bearing strength test, and the comparison between experimental results and the calculated results according to international standard formula was given. The results show that failure mode is related to the grain direction of glued laminated timber. With the linear growth of relative humidity, the dowel bearing strength and initial stiffness exhibit the trend of nonlinear decline. The calculated values of dowel bearing strength according to the existing standard formula are in poor agreement with the test values, so the existing standard formula needs to be optimized furtherly.