黔北地区主要竹种竹材气干密度与力学性质的关系研究

Study on the mechanical strength with air-dry density of the main bamboo species in the north of Guizhou province

对黔北地区几种主要竹种的气干密度与力学性质的关系研究表明:各竹种的气干密度与力学性质除部分竹种外均存在一定的曲线或直线关系,其中在气干密度与抗剪强度关系中,除慈竹、花吊丝、毛脚龙竹、金佛山方竹等竹种外,其他竹种均可利用回归方程τ12=aρ12b、τ12=aρ12+b进行估测。在气干密度与顺纹抗拉强度关系中除硬头黄、花吊丝、毛脚龙竹、金佛山方竹外,其他竹种均可利用回归方程σ12=aρ12b、σ12=aρ12+b进行估测。此外,在各回归方程中它们的精确度又存在一定的差异。

This paper analyzed the s air-dry density with mechanical strength of several kinds of bamboo species in the North of Guizhou Province.The results showed that there existed a kind of curve or straight-line connection between the air-dry density and the mechanical properties of different bamboo species.The relationship between the air-dry density and the shear strength of bamboo species except Neosinocalamus affinis,Dendrocalamus minor var.amoenus,Dendrocalamus barbatus var.internodiiradicatus,Chimonobambusa utilis could be assessed by the equationτ12=aρ12b,τ12=aρ12＋b.The relationship between the air-dry density and the tension strength parallel to grain of bamboo species except Bambusa rigida,,Dendrocalamus minor var.amoenus,Dendrocalamus barbatus var.internodiiradicatus,Chimonobambusa utilis could be assessed by the equationσ12=aρ12b,σ12=aρ12＋b.In addition,there were still some differences in the accuracy of the relative equations used in assessing the relationship between the air-dry density and the mechanical properties of bamboo species.