This study presents six pseudostatic tests on square hollow section steel (HSS) column to H-section beam bolted connections with double cover plates. The failure modes, load–displacement hysteresis curves, and backbone curves of the joints were obtained, as were the energy-dissipating capacity, stiffness, and strength. The seismic energy of the connections is dissipated by slip between the contact surfaces and plastic deformation of the beam, clamp plates and bolt holes. The joints have good rotation capacity, energy-dissipation capacity, and reasonable strength and stiffness. The connections are rigid used in bracing frame and unbracing frame before slip and semirigid for both after slip. They are full-strength in terms of strength classification. Before the interstory drift reaches 0.05, no obvious inelastic deformation occurs, indicating that the connections can be easily repaired by repositioning the connection and retightening the bolts after a severe earthquake because the interstory drift will be much less than 0.05 during a severe earthquake. A finite-element model (FEM) was established and validated through a comparison of the finite element analysis (FEA) and test results, and the bolt tension, stress distribution of the beam, and rotation of the column flange splicing connection were obtained from the FEA results. The tension of the bolt in the beam web decreased slightly, while the tension of the bolt in the beam flange decreased to 60–70% of the original pre-tension when the interstory drift reached 0.06. The column flange splice connection is rigid. Simplified formulas for joint strength were deduced and validated by testing and FEA.

这项研究提出了在方形空心截面钢（HSS）柱到H型截面双连接螺栓连接的六项拟静力试验。获得了接头的破坏模式，载荷-位移磁滞曲线和主干曲线，以及耗能能力，刚度和强度。连接的地震能量通过接触面之间的打滑以及梁，夹板和螺栓孔的塑性变形而消散。接头具有良好的旋转能力，耗能能力以及合理的强度和刚度。滑移之前，支撑在支撑框架和松开支撑框架中使用的刚性连接，滑动后均使用半刚性连接。在强度分类方面，它们是全能的。在层间位移达到0.05之前，没有发生明显的非弹性变形，表示在发生严重地震后，可以通过重新定位连接并重新拧紧螺栓来轻松地修复连接，因为在发生严重地震时，层间位移将大大小于0.05。通过比较有限元分析（FEA）和测试结果，建立并验证了有限元模型（FEM），并从中获得了螺栓的拉力，梁的应力分布以及柱法兰拼接连接的旋转。 FEA结果。当层间位移达到0.06时，梁腹板中螺栓的张力略有降低，而梁翼缘中螺栓的张力降至原始预应力的60–70％。色谱柱法兰接头连接是刚性的。通过测试和有限元分析推导并验证了简化的接头强度公式。