Compressive behaviour of hollow box pultruded FRP columns with continuous-wound fibres
Compressive behaviour of hollow box pultruded FRP columns with continuous-wound fibres
复制标题
DOI：
10.1016/j.tws.2021.108300
复制
发表时间：
2021-08-25
影响因子：
6.4
通讯作者：
Schubel, Peter
中科院分区：
文献类型：
--
作者：
Alajarmeh, Omar;Zeng, Xuesen;Schubel, Peter
拉挤纤维增强聚合物（PFRP）复合材料型材由于其低密度和优异的机械性能，现在已被用于许多民用和基础设施应用中。然而，不同的制造技术已用于生产这些PFRP型材，并且这些对PFRP型材的结构性能有影响。本研究调查的压缩行为的PFRP型材制造使用的络筒机技术，允许连续缠绕的纤维，以加强PFRP型材横向。三个不同的横截面和三个水平的长度与深度（L/D）比进行了测试，研究这些参数的PFRP型材的抗压强度的影响。据观察，连续缠绕的纤维导致渐进的失败，并防止在角落处的分裂失败。试验结果表明，矩形型材的结构性能优于方形型材。长径比的增大使梁的刚度和强度均有所降低，但位移屈曲承载力有所提高。观察到屈曲波由多项式函数控制。最后，现有的模型进行了检查与实验结果的一般板理论是有效的，目前的局部屈曲行为的测试PFRP型材。
Pultruded Fibre Reinforced Polymer (PFRP) composite profiles now have been utilized in many Civil and infrastructure applications due to their low density and outstanding mechanical properties. However, different manufacturing techniques have been used to produce these PFRP profiles, and these have an influence on the structural performance of the PFRP profiles. This study investigated the compressive behaviour of the PFRP profiles manufactured using the Winder technology, allowing continuous-wound fibres to reinforce the PFRP profiles transversely. Three different cross-sections and three levels of Length-to-Depth (L/D) ratios have been tested to study the effect of these parameters on the compressive strength of the PFRP profiles. It was observed that continuous-wound fibres led to progressive failure and prevented the splitting failure at corners. Test results showed that rectangular profiles performed structurally better than the square profiles. Moreover, the increase in L/D ratio decreased both stiffness and strength but led to higher displacement buckling capacity. It was observed that the buckling waves were governed by a polynomial function. Finally, the existing models were examined in relation to the experimental results where the general plate theory was valid to present the local buckling behaviour of the tested PFRP profiles.