| 落叶松规格材机械应力分等方法的研究 |
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| 引用本文： | 王朝晖,任海青,骆秀琴,周海宾.落叶松规格材机械应力分等方法的研究[J].木材工业,2009,23(3). |
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| 作者姓名： | 王朝晖 任海青 骆秀琴 周海宾 |
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| 作者单位： | 中国林科院木材工业研究所;国家林业局木材科学与技术重点实验室,北京,100091 |
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| 摘 要： | 对东北人工林落叶松规格材机械分等方法及其特征值进行了研究.结果表明,抗弯弹性模量与抗弯强度相关性较好,纵向振动法可作为落叶松规格材机械分等的有效方法.按照我国GB 50005-2003<木结构设计规范>的规定,落叶松规格材可归类为M14～M35之间的等级;通过机械分等,大大提高了落叶松规格材的强度设计值.
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| 关 键 词： | 规格材 落叶松 机械应力分等 |
Mechanical Stress Grading of Larch Dimension Lumber from Northeastern China |
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| WANG Zhao-hui,REN Hai-qing,LUO Xiu-qin,ZHOU Hai-bin.Mechanical Stress Grading of Larch Dimension Lumber from Northeastern China[J].China Wood Industry,2009,23(3). |
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| Authors: | WANG Zhao-hui REN Hai-qing LUO Xiu-qin ZHOU Hai-bin |
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| Institution: | Research Institute of Wood Industry;Chinese Academy of Forestry;Key Lab of Wood Science and Technology of State Forestry Administration;Beijing 100091;China |
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| Abstract: | In this research,the vibration method was used to evaluate the mechanical properties of dahurian larch(Larix gmelini),a major softwood species that grows in the Northeastern China.The results showed a good relationship between bending strength and modulus of elasticity(MOE).The good correlation of dynamic(from the vibration test) and static MOE indicated that vibration could be used as an effective mechanical stress grading tool for larch lumber.Lumber was sorted into four grades: M22,M26,M30,and M35 using ... |
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