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

HUANG Genglang; SHENG Ye; ZHANG Feng; JIANG Fengjiao; YE Xiaofan

doi:10.12326/j.2096-9694.2023170

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Predicting and Analyzing Effects of Density and Moisture Content on Elastic Modulus Parallel to Grain of Bamboo Scrimber
1.College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China
2.China State Construction Engineering Corporation Strait Construction and Development Co.,Ltd,Fuzhou 350000,Fujian,China
Vol. 38, Issue 2, Pages: 60-67(2024)
Published： 30 March 2024 ，
DOI： 10.12326/j.2096-9694.2023170

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黄庚浪,盛叶,张峰等.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[J].木材科学与技术,2024,38(02):60-67.

HUANG Genglang,SHENG Ye,ZHANG Feng,et al.Predicting and Analyzing Effects of Density and Moisture Content on Elastic Modulus Parallel to Grain of Bamboo Scrimber[J].Chinese Journal of Wood Science and Technology,2024,38(02):60-67.
黄庚浪,盛叶,张峰等.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[J].木材科学与技术,2024,38(02):60-67. DOI： 10.12326/j.2096-9694.2023170.

HUANG Genglang,SHENG Ye,ZHANG Feng,et al.Predicting and Analyzing Effects of Density and Moisture Content on Elastic Modulus Parallel to Grain of Bamboo Scrimber[J].Chinese Journal of Wood Science and Technology,2024,38(02):60-67. DOI： 10.12326/j.2096-9694.2023170.

摘要

本研究选取3组不同密度（1.10、1.20、1.30 g/cm

）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。

Abstract

In this study

bamboo scrimber specimens with three densities (1.10

1.20

1.30 g/cm

) and five moisture contents (4%

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 und

er 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 with changes in density and moisture content. The maximum errors between the measured values and the predicted values of tensile and compressive elastic modulus parallel to grain were 5.28%

8.20% for the linear combination model

and 8.91%

8.67% for the ASTM combination model

respectively. The linear combination 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

Keywords

bamboo scrimbertensile and compressive elastic modulus parallel to the graindensitymoisture contentmodel prediction

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