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对四川芦山生长发育进程中的慈竹秆形结构及物理力学性质进行了测定和分析。结果表明,慈竹节间长度、直径在林龄1～3a间迅速增加;在林龄3～5a间,节间长度缓慢增加,直径变化幅度较小。林龄3a时,慈竹节间平均长度、直径、壁厚分别为:37.99cm,32.94mm,3.46mm,均达到慈竹平均用材水平。对株龄1～3a(林龄3～5a)慈竹材物理力学性质的研究得出,竹材基本密度、顺纹抗压强度、顺纹抗剪强度均在株龄3a时最大,分别为0.570g/cm3、69.475Mpa、18.833Mpa;径、弦向干缩系数在株龄1a时最大,为0.339、0.330;株龄为2a的竹材物理力学性质最小;株龄3a时,竹材物理力学性质已达到结构用材需求。
In the process of growth and development in Lushan, Sichuan Province, the stalk structure and physical and mechanical properties were measured and analyzed. The results showed that the length and diameter of internodes increased rapidly from 1 to 3 years of age. In the age of 3 to 5 years, the length of internode increased slowly and the diameter changed slightly. When the age was 3 years, the mean length, diameter and wall thickness of the cacao bamboo were 37.99cm, 32.94mm and 3.46mm, respectively. The results showed that the basic density, the compressive strength along the grain line and the shear strength along the grain line were the largest at the age of 3a, which were 0.570g /cm3,69.475Mpa, 18.833Mpa; diameter and chordwise shrinkage coefficient of the largest in the age of 1a, 0.339,0.330; the age of 2a of the physical and mechanical properties of the smallest bamboo; plant age 3a, bamboo physical and mechanical properties have reached Structural timber demand.