长细比对CFRP约束钢管混凝土柱抗爆性能的影响

Effect of slenderness ratio on the antiknock performance of CFRP confined CFST columns

为了研究长细比对CFRP约束钢管混凝土柱抗爆性能的影响,通过有限元软件ANSYS/LS-DYNA建立了12根长细比不同的模型试件,模拟并分析了长细比对CFRP约束钢管混凝土柱抗爆性能的影响。分析结果表明:在爆炸荷载作用下,长细比越大,试件的跨中位移峰值和残余位移越大,且增长速率也越大,试件的破坏越严重,抗爆性能越差;长细比对短柱抗爆性能的影响最小,中长柱次之,对长柱抗爆性能的影响最大。

In order to study the effects of slenderness ratio on the antiknock performance of CFRP confined CFST columns,12modules with different slenderness ratios were established by finite element software ANSYS/LS-DYNA and their antiknock performance were simulated and analyzed.The results show that,under the blast loading,large slenderness ratio results in higher peak displacement and residual displacement.As the slenderness ratio increases,the growth rate of peak displacement and residual displacement accelerates,resulting in greater damage and lower antiknock performance.Results also reveal that the effects of slenderness ratio on the antiknock performance varies according to column length,with greatest influence on long column,followed by medium-long column and then short column.