水平冲击荷载作用下钢管混凝土柱动力响应试验与数值模拟

发布时间：2018-04-15 18:40

本文选题：钢管混凝土柱 + 冲击试验　；参考：《建筑科学与工程学报》2017年06期

【摘要】：为研究钢管混凝土柱在侧向冲击荷载作用下的动力性能,进行了2根圆形钢管混凝土柱的水平冲击试验,实测了冲击过程中冲击力、冲击点位移时程曲线及冲击力-位移曲线等冲击响应。建立了ABAQUS非线性有限元模型,对破坏模态及冲击力、冲击点位移时程曲线等动态响应进行模拟,模拟结果与试验结果吻合良好,进而用有限元模拟结果揭示了钢管混凝土柱在冲击荷载下的破坏机理,即整体失效过程分为冲击区局部响应、柱顶支座响应、稳定响应和卸载响应4个阶段。结果表明:在冲击荷载作用下,钢管混凝土柱发生弯剪型破坏;所得结论为深入认识钢管混凝土柱的抗冲击行为和破坏形态提供了试验与理论基础,可为今后研究制定合理的抗冲击设计方法提供依据。
[Abstract]:In order to study the dynamic behavior of concrete-filled steel tubular columns under lateral impact load, two circular concrete-filled steel tubular columns were subjected to horizontal impact tests.Shock response such as shock point displacement time history curve and impact force displacement curve.The ABAQUS nonlinear finite element model is established to simulate the dynamic response such as failure mode, impact force, impact point displacement time history curve and so on. The simulation results are in good agreement with the experimental results.The failure mechanism of concrete-filled steel tubular columns under impact load is revealed by finite element simulation. The failure process is divided into four stages: local response of impact zone, response of column top support, stability response and unloading response.The results show that concrete filled steel tubular columns are subjected to flexural and shear failure under impact loading, and the conclusions provide an experimental and theoretical basis for further understanding the impact behavior and failure patterns of concrete-filled steel tubular columns.It can provide the basis for the future research and development of a reasonable impact design method.
【作者单位】：湖南大学土木工程学院;湖南大学建筑安全与节能教育部重点实验室;华侨大学土木工程学院;南京工业大学土木工程学院;
【基金】：国家自然科学基金重点项目(51438010)
【分类号】：TU398.9

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