Wdowiak-Postulak Agnieszka
Faculty of Civil Engineering and Architecture, Kielce University of Technology, 25-314 Kielce, Poland.
Materials (Basel). 2020 Dec 24;14(1):51. doi: 10.3390/ma14010051.
The purpose of this paper is to demonstrate the properties of glued laminated beams made in diverse configurations of timber quality classes, reinforced using a new technique that is cheaper and easy to apply. The aim of the experimental investigations was to enhance reinforcement effectiveness and rigidity of glued laminated beams. The tests consisted of four-point bending of large-scale specimens reinforced with basalt fibres (BFRP). The tests were meant to obtain images of failure, the load-displacement relation and load carrying capacity of basalt fibres depending on the reinforcement ratio. The tests, which concerned low and average quality timber beams, were conducted in a few stages. The aim of the study was to popularize and increase the use of low-quality timber harvested from reafforested areas for structural applications. In the study, theoretical and numerical analysis was carried out for reinforced and unreinforced elements in various configurations of wood quality classes. The aim was to compare the results with the findings of experimental tests. Based on the tests, it was found that the load carrying capacity of beams reinforced with basalt fibre was higher by, respectively, 13% and 20% than that of reference beams, while their rigidity improved by, respectively, 9.99% and 17.13%. The experimental tests confirmed that basalt fibres are an effective structural reinforcement of structural timber with reduced mechanical properties.
本文的目的是展示采用不同木材质量等级配置制作的胶合木梁的性能，这些胶合木梁采用了一种成本更低且易于应用的新技术进行加固。实验研究的目的是提高胶合木梁的加固效果和刚度。试验包括对用玄武岩纤维（BFRP）加固的大型试件进行四点弯曲试验。这些试验旨在获取破坏图像、荷载-位移关系以及玄武岩纤维的承载能力与加固率的关系。针对低质量和中等质量木材梁的试验分几个阶段进行。该研究的目的是推广并增加将从重新造林地区采伐的低质量木材用于结构应用的比例。在该研究中，对不同木材质量等级配置下的加固和未加固构件进行了理论和数值分析。目的是将结果与实验测试结果进行比较。基于这些试验发现，用玄武岩纤维加固的梁的承载能力分别比参考梁高13%和20%，而其刚度分别提高了9.99%和17.13%。实验测试证实，玄武岩纤维是对力学性能降低的结构木材的一种有效结构加固材料。
