Mechanical stress grading of Chinese fir dimension lumber for light wood structure houses

被引：0

作者：

Ren H.-Q. ^{[1
]}

Guo W. ^{[2
]}

Fei B.-H. ^{[2
]}

Wang Z.-H. ^{[1
]}

Luo X.-Q. ^{[1
]}

机构：

[1] Research Institute of Wood Industry, Chinese Academy of Forestry

[2] Beijing Forestry Machinery Research Institute, State Forestry Administration

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2010年 / 13卷 / 03期

关键词：

Boundary condition; Characteristic value; Dimension lumber; Full-size specimen; Mechanical stress grading;

D O I：

10.3969/j.issn.1007-9629.2010.03.018

中图分类号：

学科分类号：

摘要：

The main mechanical properties of Chinese fir dimension lumber were tested by full-size specimens in order to classify different grades by mechanical stress grading(MSR) by setting boundary conditions and calculating the characteristic values. The results show that the coefficient of determination of regression relationship between strength mean values and modulus of elasticity(MOE) mean values is higher after MOE interval is divided, and the relationships among strengths can be used to guide MSR. Lumbers can be classified into three grades: M10, M18 and M26 by MSR without considering density. The relationship of UCS5%, and MOR5% is UCS5%=0.343MOR5%+15.39.

引用

页码：363 / 366

页数：3

共 5 条

[1] Wang Y.-W., Long W.-G., Yang X.-B., A research on machine grading rule of dimension lumber, Building Science Research of Sichuan, 31, 6, pp. 3-8, (2005)
[2] Ren H.-Q., Guo W., Yin Y.-F., Machine grading of lumber in North America, World Forestry Research, 19, 3, pp. 66-70, (2006)
[3] Wang Z.-H., Ren H.-Q., Luo X.-Q., Et al., Mechanically grading of lumber of Chinese fir, Proceedings of International Symposium on Wood Science and Technology, pp. 211-212, (2008)
[4] Wang Z.-H., Ren H.-Q., Luo X.-Q., Et al., Mechanical stress grading of larch dimension lumber from Northeastern China, China Wood Industry, 23, 3, pp. 1-4, (2009)
[5] Structure timber-strength classes: 6

← 1 →