为研究预加轴力下FRP-钢管约束混凝土构件在冲击荷载下的动力响应，运用有限元分析方法建立构件模型并进行模拟，得到构件冲击之后的变形图，探究轴向压力大小、约束效应系数、钢管屈服强度、混凝土强度四种因素对构件冲击性能的影响，绘制构件的冲击力峰值曲线和跨中挠度峰值曲线作为判断冲击性能的参考.模拟结果表明，试件两端预加150 kN轴力即轴压比0.15时，试件冲击力峰值最大；增大约束效应系数可以改善构件抗冲击性能；在150 kN轴向压力下，增大钢管屈服强度，试件冲击力峰值呈线性增大，跨中挠度峰值呈现线性减小；改变混凝土强度对试件跨中挠度影响较小.

In order to study the dynamic response of axially preloaded concrete filled FRP-steel tubes under impact load, the finite element analysis method was used to simulate component model, and the component deformation diagram after impacting was obtained. The effects of axial force, FRP constraining factor, steel tube yield strength and concrete compressive strength on impact properties of components were investigated. Impact force peak curve and midspan deflection peak curve of the specimens were drawn as a reference to judge the impact properties. Simulation results show that when the axial force of two ends of the specimen are up to 150 kN (the axial pressure ratio is 0.15), the impact peak value of specimens reach to maximum. The impact properties of specimen should be improved by increasing FRP constraining factor. Under the 150 kN axial force, the impact peak value of the specimen increases linearly and the peak value of midspan deflection decreases linearly along with yield strength of the steel tube increases. The change of concrete strength has little effect on the midspan deflection of the specimen.