Ye Wen, Dilum Fernando, Benoit P Gilbert, Henri Bailleres, Rongrong Hu, Luke Bisby, Dipa Roy
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引用次数: 0
摘要
混合纤维增强聚合物(FRP)-木材(HFT)薄壁结构件是最近开发的一种新型技术,可作为薄壁钢结构和铝结构的可持续替代品。HFT 结构是通过将薄木皮和玻璃纤维增强聚合物层压板形成有效的横截面几何形状而制成的。虽然现有的研究已经证明了 HFT 薄壁构件作为结构元件使用的潜力,但对 HFT 薄壁结构行为的系统研究尚未开展。本文介绍了一项旨在研究 HFT C 截面柱在同心轴向荷载作用下行为的研究。总共制作并测试了五个长度从 700 毫米到 2000 毫米不等的 HFT C 截面试样。结果发现,较短的 HFT C 截面柱由于局部屈曲而失效,而长度的增加则使失效模式变为整体屈曲。数值研究了 GF 方向和密度对 HFT C 截面柱承载能力的影响。结果发现,有必要在轴线横向提供足够的 GF 体积,但进一步增加横向 GF 体积并不能显著提高承载能力。增加平行于轴线方向的 GF 密度可提高承载能力。
An investigation into the buckling behaviour of hybrid fibre reinforced polymer-timber thin-walled C-section columns
Hybrid fibre reinforced polymer (FRP)-timber (HFT) thin-walled structural members are a novel technology developed recently as a sustainable alternative to thin-walled steel and aluminium structures. HFT structures are made by forming thin timber veneers and FRP laminates into efficient cross-sectional geometries. While existing studies have demonstrated the potential of HFT thin-walled members to be used as structural elements, a systematic study to investigate the behaviour of HFT thin-walled structures is yet to be carried out. This paper presents a study aimed at investigating the behaviour of HFT C-section columns under concentric axial loading. In total five HFT C-section specimens each from 700 mm to 2000 mm lengths were fabricated and tested. It was found that shorter HFT C-section columns failed due to local buckling while increase in length changed the failure mode to global buckling. Effect of GF orientation and density on load carrying capacity of the HFT C-section columns was investigated numerically. It was found that it’s necessary to provide adequate GF volume in transverse to axis direction, but further increase in GF volume in transverse direction did not significantly increase the load carrying capacity. Increase in GF density in parallel to axis direction increased the load carrying capacity.
期刊介绍:
Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.