论文部分内容阅读
为研究侧向冲击作用下钢骨混凝土柱抗冲击性能,基于非线性有限元软件MSC.MARC建立了钢骨混凝土柱抗冲击数值模型。对钢管混凝土柱和钢筋混凝土柱在落锤冲击作用下的抗冲击试验进行了有限元模拟,分析表明该数值模型可以较好的模拟钢管混凝土柱和钢筋混凝土柱抗冲击性能。基于此数值模型研究了侧向冲击作用下钢骨混凝土柱的抗冲击性能,并探讨了冲击质量、冲击高度、冲击位置、轴压比、钢筋及H型钢强度和混凝土强度对钢骨混凝土柱抗冲击性能影响。最后对比分析了钢筋混凝土柱、钢骨混凝土柱和内插双H型钢钢管混凝土柱的抗冲击性能。结果表明:所探讨的影响因素对钢骨混凝土柱的冲击力峰值、平台值、持时和挠度都有各自影响的规律,可以为其他构件抗冲击性能分析提供依据。在相同尺寸和试验条件下,钢骨混凝土柱的抗冲击性能优于钢筋混凝土柱,但差于内插双H型钢钢管混凝土柱。
In order to study the impact resistance of SRC columns under lateral impact, a numerical model of impact resistance of SRC columns was established based on the nonlinear finite element software MSC.MARC. The impact test of concrete filled steel tube columns and reinforced concrete columns under falling weight impact was carried out by finite element method. The results show that this numerical model can well simulate the impact resistance of concrete filled steel tubular columns and reinforced concrete columns. Based on the numerical model, the impact resistance of SRC columns under lateral impact was studied. The effects of impact mass, impact height, impact position, axial compression ratio, strength of steel bar and H-beam and concrete strength on SRC columns Impact performance impact. Finally, the impact resistance of reinforced concrete columns, SRC columns and intercalated double H-section CFST columns is compared and analyzed. The results show that the influence factors discussed have impact on peak value, plateau value, holding time and deflection of SRC columns respectively, which can provide basis for the analysis of impact resistance of other components. In the same size and test conditions, the impact resistance of SRC columns is better than that of RC columns, but worse than the interpolation of double H-section CFST columns.