Numerical Analysis of Blind Bolted End-Plate Connections Between Square CFDST Columns and Steel-Concrete Composite Beams [方套方中空夹层钢管混凝土柱与钢-混凝土梁单边螺栓端板连接节点数值分析]

作者：Wang J.; Duan M.; Guo L.; Zhang M.

来源：Progress in Steel Building Structures, 2020, 22(6): 46-55 and 68.

DOI：10.13969/j.cnki.cn31-1893.2020.06.005

• End-plate connection
• High-strength blind bolt
• Numerical simulation
• Parameter analysis
• Square CFDST column

In order to reveal the mechanical behavior and failure mechanism of blind bolted end-plate connections between square concrete-filled double skin steel tubular(CFDST) columns and steel-concrete composite beams, a finite element(FE) model of this composite joint is built accounting for complex material model and contact interactions. The accuracy of numerical analytical model is verified against the test results under cyclic loads. Typical failure modes and hysteretic behavior of this type of connection are evaluated. Furthermore, substantial parametric analysis is carried out to study the influence of geometric parameters, material parameters and load parameters on the horizontal load-displacement curves of the connections. The influence on the ultimate bearing capacity and initial stiffness is also discussed. The test and analysis results indicate that the blind bolted composite connections with square CFDST columns have good seismic performance and mechanical properties, and can be used in assembled composite frames in high intensity earthquake regions. The FE model built in this paper for this composite connection can be applied in the design and calculation of the assembled composite frames.

• 单位
  合肥工业大学