不同地位级雷竹竹材的物理力学性质比较

测定了不同地位级不同竹龄雷竹竹材的物理力学性质,结果表明:不同地位级雷竹竹材的基本密度和力学性质都随竹龄的增大而提高;径向、弦向和体积全干缩率随竹龄增大而减少,地位级Ⅱ的竹材的基本密度和力学性质高于地位级Ⅰ的,径向、弦向和体积全干缩系数小于地位级Ⅰ;不同地位级的竹材基本密度、顺纹抗压强度、顺纹抗拉强度和弦向抗弯强度有显著差异.

Comparison on Physico-mechanical Properties of Phyllostachys praecox cv.prevernalis with Different Site Class

Determination of physico-mechanical properties of Phyllostachys praecox cv. prevernalis with different site class resulted that basic density and mechanical properties increased with age, but radial, tangential and volume oven-dry shrinkage index reduced with age. Basic density and mechanical properties of culm with site class II was higher than that with site class I, but their radial, tangential and volume over-dry shrinkage index with site class II was lower that with site class I. Basic density, extension, compression and bending strength of culms with varied site class had significant difference.