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研究钢管混凝土(CFST)构件的冲击特性。通过一系列试验来获得侧向冲击下受冲击力影响的组合构件的失效模式和时程分析。试验参数包括CFST样本的轴向载荷等级、约束因素和冲击能。建立一个包含钢筋和混凝土材料应变率效应、钢管和核心混凝土间相互作用以及外部钢管对核心混凝土约束效应的有限元模型。试验数据被用于验证有限元模型的准确性且基本上与之吻合。同时使用有限元模型进行了CFS冲击性能的全过程分析。
Study on the impact properties of concrete filled steel tubular members (CFST). Through a series of experiments, the failure modes and time history analysis of the composite members subjected to impact under lateral impact were obtained. The test parameters include the axial load rating of CFST specimens, constraints and impact energy. A finite element model including strain rate effect of steel and concrete material, interaction between steel pipe and core concrete and restraint effect of external steel pipe to core concrete is established. The experimental data were used to verify the accuracy of the finite element model and basically consistent with it. At the same time, the whole process of CFS impact performance was analyzed by finite element model.