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Manufacture and structural performance of modular hybrid FRP-timber thin-walled columns

机译：模块化杂交FRP-木材薄壁柱的制造和结构性能

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摘要

Hybrid FRP-timber (HFT) thin-walled sections are high-performance and lightweight wood-based composite structures, developed to meet an increasing societal demand for sustainable construction. This paper proposes an improved modular manufacturing method for HFT thin-walled sections, which inherits advantages of existing manufacturing approaches while reducing fabrication effort and significantly improving structural performance. Geometric design and fabrication processes are first demonstrated with the manufacture of structural square hollow sections. Experimental and numerical studies are then presented for stub columns loaded under uniaxial compression, with six column types investigated to demonstrate the influence of FRP and timber material selection on structural performance. The GFRP wrapping material had the most significant influence on section behaviour, with a transition from section buckling to crushing failure, and corresponding improvements in section strength and stiffness, shown with increasing GFRP layers. As compared with previouslystudied folded HFT sections, modular HFT sections showed a 69% and 38% increase in strength and strength-to-weight ratio, respectively.
机译：杂交FRP-Timber（HFT）薄壁部分是高性能和轻质的木材复合结构，以满足越来越多的社会对可持续建筑需求。本文提出了一种改进的HFT薄壁部分的模块化制造方法，其继承了现有制造方法的优点，同时减少了制造努力，显着提高了结构性能。首先通过制造结构方形中空部分来说明几何设计和制造工艺。然后呈现在单轴压缩下装载的存根柱进行实验和数值研究，研究了六种柱类型，以证明FRP和木材材料选择对结构性能的影响。 GFRP包装材料对截面行为具有最大的影响，从屈曲到破碎失效的转变，以及截面强度和刚度的相应改进，随着GFRP层的增加而显示。与预先折叠的HFT部分相比，模块化HFT部分分别显示出强度和强度重量比增加69％和38％。

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