GFRP管约束泡沫柱抗侧向冲击数值模拟

Numerical simulation of lateral impact resistance of GFRP tube confined foam composite column

通过对玻璃纤维(GFRP)空管和GFRP管约束泡沫柱进行低速冲击有限元模拟,研究冲击高度对试件冲击力时程曲线和吸能效果的影响;将GFRP管约束泡沫柱与GFRP管约束混凝土柱的冲击力时程曲线进行对比,研究不同填充材料对试件冲击力时程曲线和吸能效果的影响。研究结果表明:随着冲击高度的增加,试件的冲击力峰值增大,试件的吸能效果降低;填充泡沫比填充混凝土具有更好的吸能效果,可以更有效抑制冲击荷载的增加;GFRP管约束泡沫柱抗侧向冲击破坏分为两个阶段,前一阶段GFRP失效,后一阶段泡沫复合材料芯材失效。

The influence of impact height on the time history curves of the impact force and the energy absorption was studied by finite element simulation of glass fibre reinforced polymer（ GFRP） hollow tube and GFRP tube confined foam column. Using the comparison with the GFRP tube confined concrete column and GFRP tube confined foam column,this paper studied the effects of different filling materials on the impact time history and energy absorption. The results show that with the increase in the impact height,impact force of the specimen increases while the energy absorption effect of the specimen decreases. The filling foam has better energy absorption effect than the filled concrete,which can effectively suppress the increase of the impact load.The damage of foam column confined with GFRP tube against lateral impact is divided into two stages,the previous stage of GFRP failure,and the latter stage of foam composite core material failure.