密度与含水率双因素作用下重组竹顺纹弹性模量的预测与分析  

Predicting and Analyzing Effects of Density and Moisture Content on Elastic Modulus Parallel to Grain of Bamboo Scrimber

作　　者：黄庚浪 盛叶 张峰 江凤娇 叶小凡 HUANG Genglang;SHENG Ye;ZHANG Feng;JIANG Fengjiao;YE Xiaofan(College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;China State Construction Engineering Corporation Strait Construction and Development Co.,Ltd,Fuzhou 350000,Fujian,China)

机构地区：[1]福建农林大学交通与土木工程学院,福建福州350002 [2]中建海峡建设发展有限公司,福建福州350000

出　　处：《木材科学与技术》2024年第2期60-67,共8页Chinese Journal of Wood Science and Technology

基　　金：福建省科技厅国家科技项目备案类“秸秆夹芯竹木复合集装箱底板关键技术研究及应用”(2022L3006);中建股份科技研发项目“绿色低碳装配式重组竹建筑关键技术研究”(CSCEC-2022-Q-58)。

摘　　要：本研究选取3组不同密度(1.10、1.20、1.30 g/cm^(3))和5组不同含水率(4%,8%,12%,16%,20%)的重组竹试件进行顺纹抗拉、抗压试验,分析不同密度和含水率作用下重组竹顺纹抗拉、抗压弹性模量的变化规律。结果发现,重组竹顺纹抗拉、抗压弹性模量随密度的增大而增大,随含水率的升高而减小并趋于平衡;通过试验研究和数据拟合提出重组竹顺纹抗拉、抗压弹性模量的双参数耦合模型,线性组合模型和ASTM组合模型均能较好地预测重组竹顺纹抗拉、抗压弹性模量随密度和含水率变化后的理论值,顺纹抗拉弹性模量的实测值与线性组合模型和ASTM组合模型预测值之间最大误差为5.28%和8.20%;顺纹抗压弹性模量的实测值与线性组合模型和ASTM组合模型预测值之间最大误差为8.91%和8.67%,因线性组合模型计算更为简便,建议在实际应用中优先选用。In this study,bamboo scrimber specimens with three densities(1.10,1.20,1.30 g/cm^(3))and five moisture contents(4%,8%,12%,16%,20%)were tested for tensile and compressive elastic modulus parallel to grain.The changes of tensile and compressive elastic modulus parallel to the grain of bamboo scrimber under different densities and moisture contents were analyzed.The results showed that the tensile and compressive elastic modulus parallel to the grain of bamboo scrimbers increased with the increase of density.When the moisture contents increase,the tensile and compressive elastic modulus parallel to the grain decrease and then become balanced eventually.Through experiment research and data fitting,a two-parameter coupling model of tensile and compressive elastic modulus of bamboo scrimber was proposed.Both the linear combination model and the ASTM combination model can well predict the theoretical values of tensile and compressive elastic modulus of bamboo scrimber withchanges in density and moisture content. The maximum errors between the measured values and thepredicted values of tensile and compressive elastic modulus parallel to grain were 5.28%, 8.20% for thelinear combination model, and 8.91%, 8.67% for the ASTM combination model, respectively. The linearcombination model is recommended due to its effective calculation process in practical applications.

关 键 词：重组竹 顺纹抗拉、抗压弹性模量 密度 含水率 模型预测 

分 类 号：TS653[轻工技术与工程] S781.9[农业科学—木材科学与技术]