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Mechanical performance of fibre reinforced polymer confined softwood timber for pole applications

机译：纤维增强聚合物约束软木木材在撑杆方面的机械性能

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摘要

Hardwood as sourcing of utility poles becomes difficult and costly due to its slow replenishment and the high clearing rates in the 19th century as well as occasional bushfires. There is a critical need to source other timber species for timber poles. This paper presents a study of using fibre reinforced polymer (FRP) composites as a confinement system onto plantation softwood for utility poles. The proposed method was a wet layup process using multiple layers of 0790 degrees biaxial woven roving E-glass fibre sheets. A series of FRP timber specimens, with different confinement lengths ranging from 0% to 70% of the span length of 5.4 m, were prepared and tested in three-point bending to present two equivalent cantilevers. A timber/FRP composite section with full confinement length was also investigated. Results showed that the FRP system, depending on the confinement length, provided a considerable improvement to the softwood regarding the load carrying capacity and bending stiffness. Theoretical calculation showed a good comparison to the experimental bending stiffness. Finally, finite element results showed satisfactory agreement with the experiments in terms of load carrying capacity and bending stiffness and failure modes.
机译：由于19世纪的补给缓慢，清理率高以及偶尔发生的丛林大火，硬木作为电线杆的采购变得困难而昂贵。迫切需要为木杆采购其他木材。本文介绍了使用纤维增强聚合物（FRP）复合材料作为用于电线杆的人工软木的封闭系统的研究。提出的方法是湿法铺网工艺，使用多层0790度双轴编织粗纱E-玻璃纤维片。准备了一系列FRP木材标本，其限制长度在5.4 m跨度的0％到70％之间，并进行了三点弯曲测试，得出了两个等效的悬臂梁。还研究了具有完整限制长度的木材/ FRP复合材料截面。结果表明，根据约束长度，FRP系统对软木的承载能力和抗弯刚度进行了相当大的改进。理论计算表明与实验弯曲刚度有很好的比较。最后，有限元结果在承载能力，弯曲刚度和破坏模式方面与实验结果令人满意。

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  • 来源
    《Composite Structures》 |2020年第3期|111807.1-111807.10|共10页
  • 作者

  • 作者单位

    Monash Univ Dept Civil Engn Clayton Vic 3800 Australia;

    Lanzhou Univ Sch Civil Engn & Mech Lanzhou 730000 Peoples R China;

    Yarra Energy 65 Allsops Rd Launching Pl Vic 3139 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Softwood timber; Fibre reinforced polymer; Utility pole; Confinement; Bending;

    机译：软木木材;纤维增强聚合物;电线杆;禁闭;弯曲;

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