Abstract Aluminum alloy materials have been extensively used in long-span roof structures, especially in coastal and industrial buildings containing corrosive matters. In this study, new-type aluminum alloy bolt-sphere joints were taken as research objects and evaluated through tensile test and numerical simulation. The tensile properties and failure mechanism of the aluminum alloy bolt-sphere joints were explored. A calculation formula for the tension capacity of aluminum alloy bolt-sphere joints was proposed. The following conclusions were drawn based on the test data and the numerical simulation results: (1) the tension capacity of aluminum alloy bolt-sphere joints is controlled by the tensile properties of seal plates and the uplift-resistant properties of stainless steel bolts; (2) as the thickness of the seal plate increases, its main tensile failure modes are the combined tensile and shear failures at the ring crush part of the aluminum pipe, the tensile failure at the ring crush part of the aluminum pipe, and the tensile failure of the stainless steel bolt; (3) the tensile failure modes of the bolts are mainly the rupture failure of the bolt member and the shear failure of the thread according to the different screwing depths of the bolts into the sphere; and (4) the screwing depth of the bolt into the sphere should be more than 1.6d (d is the diameter of the stainless steel bolt); (5) the proposed calculation formula is accurate and effective.

中文翻译：

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铝合金螺栓球接头的力学性能及设计方法

摘要 铝合金材料在大跨度屋面结构中得到了广泛的应用，特别是在沿海和含有腐蚀性物质的工业建筑中。本研究以新型铝合金螺栓球接头为研究对象，通过拉伸试验和数值模拟进行评价。探讨了铝合金螺栓球接头的拉伸性能和失效机理。提出了铝合金螺栓球接头抗拉能力的计算公式。根据试验数据和数值模拟结果得出以下结论：（1）铝合金螺栓球接头的抗拉能力受密封板拉伸性能和不锈钢螺栓抗拔性能的控制；(2)随着密封板厚度的增加，其主要的拉伸破坏模式为铝管环压部分的拉剪复合破坏、铝管环压部分的拉伸破坏和不锈钢螺栓的拉伸破坏；(3)螺栓的拉伸破坏形式主要是螺栓构件的断裂破坏和螺纹的剪切破坏，根据螺栓进入球体的旋入深度不同；(4)螺栓旋入球体的深度应大于1.6d（d为不锈钢螺栓直径）；(5)提出的计算公式准确有效。(3)螺栓的拉伸破坏形式主要是螺栓构件的断裂破坏和螺纹的剪切破坏，根据螺栓进入球体的旋入深度不同；(4)螺栓旋入球体的深度应大于1.6d（d为不锈钢螺栓直径）；(5)提出的计算公式准确有效。(3)螺栓的拉伸破坏形式主要是螺栓构件的断裂破坏和螺纹的剪切破坏，根据螺栓进入球体的旋入深度不同；(4)螺栓旋入球体的深度应大于1.6d（d为不锈钢螺栓直径）；(5)提出的计算公式准确有效。