新型拉挤GFRP 轻木组合梁弯曲性能试验研究

Experimental Study on Flexural Performance of Pultruded GFRP Light Wood Sandwich Beams

关键词:  纤维增强复合材料  木梁  组合梁  拉挤成型工艺  弯曲性能

Key words:  fiber reinforced polymer（FRP）  timber beam  composite sandwich beam  pultrusion process  flexural property

摘要:

提出一种由玻璃纤维增强复合材料（GFRP）外壳和轻木芯材组成的新型GFRP 轻木组合梁及其拉挤成型工艺，并选用无碱玻璃纤维、泡桐木和不饱和聚酯树脂为原料制备组合梁构件.通过三点弯曲试验，获得了组合梁构件弯曲力学特性及破坏模式.结果表明:GFRP 泡桐木组合梁具有良好的弹性性能和承载能力，其承载力和抗弯刚度分别为泡桐木扁梁的174，128倍，是GFRP空心管的41，17倍，具有良好的组合效应，可使GFRP和泡桐木2种材料得到充分利用.

Abstract:

A GFRP light wood sandwich beam(GWSB) was designed. A corresponding pultrusion process for the GWSB was proposed. Alkali free glass fiber, paulownia wood and unsaturated polyester resin were selected to manufacture GWSB. According to three point bending test, the flexural performance and failure mode of GWSB were investigated. The results show that GWSB has a better elastic property and bearing capacity. Compared with paulownia wood beam and pultruded GFRP pipe, the bearing capacity is increased by 174 and 41 times, and the bending stiffness is improved by 128 and 17 times. GWSB can make good use of both GFRP and paulownia wood materials.