The finite element model of a tubular member under the combined action of axial compression, creep, and axial impact was constructed with the numerical analysis software, to evaluate the core concrete creep effect on the dynamic responses of a steel tubular member in axial compression. In the model, the creep effect of core concrete of different age is equivalent to the change of its elastic modulus. Then, the dynamic responses of a tubular member in axial compression and impact were simulated considering the creep effect, time-history curves of impact load, contact time, axial deformation, stress and strain were plotted, and the effect of creep on them was discussed. The impact load peak decreases with the development of the core concrete creep, and the most is about 51%; the contact time and axial deformation increase; the concrete stress decreases, but the concrete strain increases greatly. The minimum and maximum principal concrete strains after 30 years exceeded those after 28 days by 6.35 and 8.6 times, respectively. The core concrete creep has a less effects on the stress and strain of the steel tube. The fruits provide a scientific help for the impact resistance design of a concrete-filled steel tubular member in axial compression.

利用数值分析软件建立了管状构件在轴向压缩，蠕变和轴向冲击共同作用下的有限元模型，以评估核心混凝土的蠕变效应对钢管在轴向压缩过程中动力响应的影响。在模型中，不同龄期的芯混凝土的蠕变效应等于其弹性模量的变化。然后，考虑了蠕变效应，模拟了管状构件在轴向压缩和冲击中的动力响应，绘制了冲击载荷，接触时间，轴向变形，应力和应变的时间历史曲线，并讨论了蠕变对其的影响。 。冲击载荷峰值随核心混凝土蠕变的发展而减小，最大约为51％。接触时间和轴向变形增加；混凝土应力降低，但混凝土应变大大增加。30年后的最小和最大主要混凝土应变分别比28天后的最大应变大6.35和8.6倍。核心混凝土蠕变对钢管的应力和应变影响较小。这些果实为轴向受压的钢管混凝土构件的抗冲击设计提供了科学帮助。