Abstract In this study, blind-bolted joints were designed for use between steel beams and concrete-filled double steel tubular (CFDST) columns to utilize the structural advantages offered by double steel tubes. Six joint specimens were tested under a constant axial load and lateral cyclic load for a CFDST column. The seismic behaviors of these blind-bolted joints were estimated in terms of the hysteretic curves, ductility, and energy dissipation. The effects of a T-plate section type and steel beam-type on the semi-rigid joints were studied. The test results showed that the failure of the joints began with the yielding of the T-plates, and that the final failure mode was plastic deformation at the steel beam ends. The obtained hysteretic curves were complete, and the energy dissipation ability of the bolted joint was strong. The bearing capacity and energy dissipation of ribbed joints were higher than those of unribbed joints. Based on a steel volume comparison, the installation of stiffening ribs proved to be considerably more effective than the thickening of the T-plate flanges. The strain response of the inner tube in each CFDST column was also estimated. It was concluded that the blind-bolted joints exhibit excellent deformation capacities and structural internal force redistributions. The results of this experimental research could be helpful for the application of blind-bolted joints in fabricated CFDST structures.

中文翻译：

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双钢管混凝土结构盲栓节点抗震试验

摘要 在本研究中，利用双钢管提供的结构优势，设计了用于钢梁和混凝土填充双钢管 (CFDST) 柱之间的盲螺栓接头。CFDST 柱在恒定轴向载荷和横向循环载荷下对六个接头试样进行了测试。这些盲螺栓接头的抗震性能根据滞后曲线、延性和能量耗散进行估计。研究了T型板截面类型和钢梁类型对半刚性节点的影响。试验结果表明，接头的破坏始于T型板的屈服，最终破坏模式是钢梁端部的塑性变形。得到的滞回曲线完整，螺栓连接耗能能力强。带肋节点的承载力和耗能高于无肋节点。根据钢材体积比较，事实证明安装加强筋比加厚 T 型板法兰更有效。还估计了每个 CFDST 柱中内管的应变响应。得出的结论是，盲螺栓接头表现出优异的变形能力和结构内力重新分布。该实验研究的结果有助于盲螺栓接头在制造 CFDST 结构中的应用。还估计了每个 CFDST 柱中内管的应变响应。得出的结论是，盲螺栓接头表现出优异的变形能力和结构内力重新分布。该实验研究的结果有助于盲螺栓接头在装配式 CFDST 结构中的应用。还估计了每个 CFDST 柱中内管的应变响应。得出的结论是，盲螺栓接头表现出优异的变形能力和结构内力重新分布。该实验研究的结果有助于盲螺栓接头在制造 CFDST 结构中的应用。