毛竹实生苗物理力学性质的研究

Study on Physico-mechanical Properties of Moso Bamboo Seedlings

以材性优异且同样条件下种植的当地鞭生毛竹为参比,研究了毛竹实生苗竹材的物理力学性能。结果表明,毛竹实生苗竹材的气干密度为0.617 g/cm^3,小于鞭生竹的气干密度(0.662 g/cm^3);全干密度为0.562 g/cm^3,小于鞭生竹的全干密度(0.607 g/cm^3);气干或全干时,毛竹实生苗的干缩率均小于鞭生竹;除顺纹抗拉强度外,毛竹实生苗的顺纹抗压强度、顺纹抗剪强度、抗弯强度均低于鞭生竹。因此,毛竹实生苗具有较高的强重比,相比鞭生竹材,具有密度较低、干缩率较小、力学强度性能良好的特点。

The wood physico-mechanical properties of themoso bambooseedlings were studied,comparing with the fine local whipmoso bamboos planted under the same conditions.The results showed that the air-dried density of themoso bamboo seedlings was 0.617 g/cm^3,and the oven-dried density was 0.562 g/cm^3,both lower than those of whipmoso bamboos(0.662 g/cm^3 and 0.607 g/cm^3).Both the air-dried and oven-dried shrinkage of the moso bamboo seedlings were lower than those of whip moso bamboos.Except the tensile strength parallel to grain,the compression strength parallel to grain,the shearing strength parallel to grain and bending strength of the moso bamboo seedlings were all lower than those of whip moso bamboos.Therefore,the moso bamboo seedlings have a high ratio of strength to weight with the characteristics of lower density,lower dry shrinkage and good mechanical strength compared to whip moso bamboos.