RESPONSE OF FLAX FRP-SKINNED FOAM CORED TUBES TO AXIAL LOADS
The feasibility of Flax Fibre Reinforced Polymer(FFRP)skinned tubes as lightweight compression members was investigated by testing 300 mm tall and 150 mm diameter flax-FRP skinned foam-cored tubes under axial loads.Various fibre arrangements and foam densities(32 to 58 kg/m3)were considered and compared to GFRP-skinned tubes.With one hoop layer,FFRP-skinned tubes tended to fail by rupture of the hoop layer but with three hoop layers the failure mode changes to crushing of the longitudinal fibres outwards from the foam.GFRP tubes failed by longitudinal fibre crushing towards the foam.A hollow FFRP tube had about half the strength of foam-filled tubes.FRP crushinggoverned FFRP tubes developed,on average,51%the ultimate stress of the GFRP tubes but developed more of their pure material compression capacity(71%,compared to 36%for GFRP)as the thicker FFRP sections better resisted buckling.Similarly,the strength-to-weight ratio,was higher for the GFRP tubes(55)than it was for the FFRP tubes(ranging between 21-35); both values are considerably higher than normal strength concrete(15).The results indicate that FFRP-skinned tubes show reasonable axial performance,particularly for lightweight construction,and that further studies on longer compression members are encouraged.
Flax FRP Thin Walled Sections Axial Load All FRP Structures
Douglas G.Tomlinson Amir Z.Fam
Department of Civil and Environmental Engineering,University of Alberta,9211-116th St.Edmonton,Canad Department of Civil Engineering,Queens University,58 University Ave.,Kingston,Canada
国际会议
新加坡
英文
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2017-07-19（万方平台首次上网日期，不代表论文的发表时间）