This research presents a numerical analysis of bolts used as mechanical connectors in circular concrete-filled steel tube columns. The numerical model was calibrated with the experimental results and was analyzed different parameters such as bolt lengths, steel tube thickness, and concrete strength. The finite element model was developed in Abaqus software, using different constitutive models of concrete behavior. The results indicated that: (1) The thickness of the steel tube must be compatible with the diameter of the shear connector showing an ideal ratio between 1.3 and 2.0; (2) The length of the shear connector did not cause a significant change in the load capacity; (3) The minimum distance between the shear connectors of six times the diameter was enough to prevent overlap in their failure modes.

这项研究提出了圆形钢管混凝土柱中用作机械连接器的螺栓的数值分析。用实验结果对数值模型进行校准，并分析了不同的参数，例如螺栓长度，钢管厚度和混凝土强度。使用不同的混凝土行为本构模型，在Abaqus软件中开发了有限元模型。结果表明：（1）钢管的厚度必须与剪切连接器的直径相适应，并显示出理想的比值在1.3和2.0之间；（2）剪力连接器的长度没有引起负载能力的明显变化；（3）剪切连接器之间的最小距离是直径的六倍，足以防止其破坏模式重叠。