侧向冲击下中空箱形钢管混凝土叠合柱动力响应的实验与有限元分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (9) : 166-172.

论文

贾志路，王蕊

作者信息 +

Tests and finite element analysis for dynamic response of hollow box concrete-encased CFST columns under lateral impact

JIA ZhiLu，WANG Rui

Author information +

文章历史 +

摘要

中空箱形钢管混凝土叠合柱由钢筋混凝土和钢管混凝土组成，为研究其抗冲击性能，利用自主研发的落锤式试验机开展箱形叠合柱抗冲击实验，重点研究了边界条件、冲击高度和轴压比对冲击力时程、跨中位移的影响。此外在实验基础上通过ANSYS/LS-DYNA软件建立了有限元模型，分析了各组件内能分配。实验结果表明：随冲击高度的增加，冲击力时程曲线由两段式发展为三段式，内埋钢管混凝土作用逐渐明显；随边界条件的改变，两端固定时的抗变形能力较两端简支时增强；而轴压比对其动力响应影响不显著；冲击能量较大时，钢管混凝土吸收的能量达到了1/3，抗冲击性明显。

Abstract

The hollow box concrete-encased CFST (concrete-filled steel tubular) column consists of reinforced concrete and concrete filled steel tube, drop hammer test machine based on independent research and development carries out the box composite columns impact experiments to study its impact behavior, focusing the effect of boundary conditions, impact height and axial compression ratio on the time history of impact force and midspan displacement. In addition, based on the experiment, a finite element analysis model is developed by ANSYS/LS-DYNA software to analyze energy dissipation of each element. The experimental results show that the time history curve of impact force is developed from two stage to three stage with the increase of impact height, and the effect of encased concrete filled steel tube is gradually obvious; with the boundary conditions changing, the anti-deformation capacity of fixed ends is better than that of supported simply at both ends; and the axial compression ratio has little influence on the dynamic response of the member; When the impact energy is large, the energy absorbed by the steel tube concrete reaches 1/3, and the impact resistance is obvious.

导出引用

贾志路，王蕊. 侧向冲击下中空箱形钢管混凝土叠合柱动力响应的实验与有限元分析[J]. 振动与冲击, 2019, 38(9): 166-172

JIA ZhiLu，WANG Rui. Tests and finite element analysis for dynamic response of hollow box concrete-encased CFST columns under lateral impact[J]. Journal of Vibration and Shock, 2019, 38(9): 166-172

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