| 摘要: |
| 以新型桉木制结构复合材PSL柱为试验对象，进行了应力波无损动态力学性能测试和足尺顺纹受压静态力学性能测试，探讨了PSL柱动、静态弹性模量之间的关系，分析了应力波沿PSL柱斜对角向的传播机理，建立了PSL柱斜对角向动态弹性模量的简化计算模型.结果表明：PSL柱纵向动态弹性模量与宽度方向、厚度方向、斜对角向动态弹性模量的比值分别为114，419，17左右；PSL柱纵向动态弹性模量约为纵向静态弹性模量的146倍；受压损伤后PSL柱纵向和斜对角向动态弹性模量均为相应未损伤动态弹性模量的084倍左右.PSL柱斜对角向动态弹性模量主要取决于应力波沿纵向、宽度方向、厚度方向传播的距离分量及各方向动态弹性模量的大小. |
| 关键词: 结构复合材（PSL） 顺纹受压 无损检测 应力波 弹性模量 损伤 |
| DOI：103969/j.issn1007 9629201306013 |
| 分类号: |
| 基金项目:引进国际先进林业科学技术项目（2012 4 29） |
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| Static and Dynamic Elastic Modulus of Eucalyptus StructuralComposite Lumber（PSL） Column |
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ZHONG Yong1, REN Hai qing1, XING Xin ting1, GAO Li1, LI Hong xia2
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1.Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China;2.Architecture Department, Huanghe Science & Technology College, Zhengzhou 450063, China
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| Abstract: |
| For new type eucalyptus structural composite lumber（PSL） column, dynamic elastic modulus was determined by nondestructive stress wave, while the static elastic modulus was determined by full scale compression in paralleling to grain. The relationship between the dynamic elastic modulus and the static elastic modulus was investigated. By analyzing stress wave propagation mechanism at diagonal direction, a simplified theoretical model was constructed to calculate the dynamic elastic modulus at diagonal direction. The results indicate that the ratio of dynamic elastic modulus at longitudinal direction to the that at width direction, thickness direction and diagonal direction are about 114, 419 and 17 respectively. At longitudinal direction, dynamic elastic modulus is about 146 times higher than static elastic modulus. Both longitudinal direction and diagonal direction, the ratio of damaged dynamic elastic modulus to undamaged dynamic elastic modulus is about 084. Dynamic elastic modulus of PSL column at diagonal direction depends on the distance component and dynamic elastic modulus at longitudinal direction, width direction, thickness direction. |
| Key words: structural composite lumber（PSL） compression in paralleling to grain nondestructive test stress wave elastic modulus damage |
