The socket joint are commonly employed in large-span spatial structures; however, its bending stiffness is limited. Based on the socket joint, this paper proposes an improved and novel sprayer joint that features a more rational force transmission mechanism and have larger bending stiffness. Firstly, the joint is designed, followed by verification of numerical model and bending stiffness comparison with socket joint. Secondly, the bending performance of the sprayer joints with various surrounding bolt radii under load conditions is investigated, and the resulting bending moment-rotation curves are obtained. The research findings demonstrate that the force transmission mechanism of the sprayer joint with larger bending stiffness is more rational. When the surrounding bolt radius is excessively small or the axial tension is excessively high, the bolt prematurely yields, leading to a significant decrease in joint stiffness. Despite a mere 15% increase in material cost, the bending stiffness of the new joint is 21.71 times higher than that of the traditional socket joint, and the ultimate bending moment is 5.42 times higher.

承插接头常用于大跨空间结构；然而，其弯曲刚度有限。本文在套筒接头的基础上，提出了一种改进的新型喷雾器接头，其传力机构更加合理，弯曲刚度更大。首先设计接头，然后进行数值模型验证并与承插接头的弯曲刚度进行比较。其次，研究了不同周围螺栓半径的喷雾器接头在载荷条件下的弯曲性能，并获得了弯矩-旋转曲线。研究结果表明，弯曲刚度较大的喷雾器接头的力传递机制更加合理。当周围螺栓半径过小或轴向拉力过高时，螺栓过早屈服，导致节点刚度显着下降。尽管材料成本仅增加15%，但新型接头的弯曲刚度比传统承插接头高21.71倍，极限弯矩高5.42倍。