【摘要】：基于ABAQUS有限元軟件為平臺建立了FRP管-混凝土-鋼管組合結(jié)構(gòu)在低速側(cè)向撞擊荷載下的有限元計(jì)算模型,該模型計(jì)算結(jié)果與現(xiàn)有試驗(yàn)結(jié)果對比后吻合良好,能夠較好地模擬FRP管-混凝土-鋼管組合結(jié)構(gòu)在側(cè)向撞擊作用下的性能。同時利用該模型進(jìn)行了有限元參數(shù)分析,通過改變沖擊能量和空心率來分析它們各自對該組合結(jié)構(gòu)撞擊性能的影響。得出的結(jié)論是沖擊能量對該組合結(jié)構(gòu)跨中極限撓度影響顯著,但沖擊力平臺值卻幾乎不變;空心率對該組合結(jié)構(gòu)抗撞擊性能影響較大,尤其是當(dāng)空心率在0.6~0.8范圍內(nèi)時組合結(jié)構(gòu)展現(xiàn)出良好的抗撞擊性能,且當(dāng)空心率χ=0.7時,FRP管-混凝土-鋼管組合結(jié)構(gòu)表現(xiàn)出的抗沖擊力學(xué)性能最好。這些研究對進(jìn)一步開展FRP管-混凝土-鋼管組合結(jié)構(gòu)的抗撞擊性能研究提供了一定的參考依據(jù)。
[Abstract]:Based on ABAQUS finite element software, the finite element calculation model of FRP pipe-concrete-steel pipe composite structure under low-speed lateral impact is established. The calculated results of the model are in good agreement with the existing experimental results. It can simulate the performance of FRP pipe-concrete-steel pipe composite structure under lateral impact. At the same time, the finite element parameter analysis is carried out by using the model. By changing the impact energy and the empty heart rate, the impact performance of the composite structure is analyzed by changing the impact energy and the empty heart rate. The conclusion is that the impact energy has a significant effect on the mid-span limit deflection of the composite structure, but the impact force platform value is almost unchanged. The space heart rate has a great effect on the impact resistance of the composite structure, especially when the air heart rate is in the range of 0.6 渭 0.8, the composite structure shows a good anti-impact performance, and when the air heart rate is 蠂 = 0.7, the impact resistance of the composite structure is better than that of the composite structure. FRP pipe-concrete-steel pipe composite structure shows the best impact mechanical properties. These studies provide some reference for further research on impact resistance of FRP pipe-concrete-steel pipe composite structure.
，

本文編號：2444200