Abstract The bolt–column (BC) joint has enough bending stiffness satisfying large-span single-layer reticulated shell structure well. The hysteretic behavior of BC joints under different in-plane combinations of bending moment and axial force is investigated in this study. Firstly, precise finite element models (FEM) of the BC joints, which considered the material and the geometric and contact nonlinearities, were established in ABAQUS. The failure modes, hysteretic curves, skeleton curves, and bearing capacity for assessing the joint hysteretic behavior were investigated in detail by the numerical analysis. BC joints under different combined axial force and cyclic bending loads were studied by numerical analysis to obtain the impact of the axial force, which provides necessary technical support for engineering practice. Three tests were conducted and the results verified that the FEM was effective in simulating the joint behavior by comparison with the test results. The research shows that the hysteretic capacity of BC joints under in-plane bending is weaker than that under out-of-plane bending, but the bearing capacity of former is higher. Increasing the thickness of the side and middle plates can slightly enhance the joint in-plane hysteretic capacity, which is improved with small axial compression and reduced with high axial compression and axial tension.

中文翻译：

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通过实验和数值研究在面内荷载组合下螺栓柱节点的滞回行为

摘要 螺栓柱（BC）节点具有足够的抗弯刚度，能很好地满足大跨度单层网壳结构的要求。本研究研究了 BC 接头在不同平面内弯矩和轴力组合下的滞后行为。首先，在ABAQUS中建立了考虑材料、几何和接触非线性的BC节点精确有限元模型（FEM）。通过数值分析详细研究了用于评估接头滞后行为的失效模式、滞后曲线、骨架曲线和承载能力。通过数值分析研究了不同组合轴向力和循环弯曲载荷作用下的BC节点，获得了轴向力的影响，为工程实践提供了必要的技术支持。进行了三个测试，结果通过与测试结果的比较验证了 FEM 在模拟接头行为方面是有效的。研究表明，BC节点在面内弯曲下的滞回能力弱于面外弯曲下，但前者的承载力更高。增加侧板和中板的厚度可以略微提高接头面内滞回能力，轴压较小时提高，轴压和轴拉高时降低。