Abstract Structures with tubular profiles gain space in civil construction due to their excellent response under tension, compression, and torsion. They are widely used in structural trusses, especially in large lengths. The profiles have a limited size due to the manufacturing and transport process. Therefore, there is a need to use some mechanism to perform the joint of profiles and obtain the desired length. This work aims to develop a new type of bar splice in circular hollow section (CHS) connection called sleeve connection, composed of two tubes connected with another smaller diameter tube with bolts arranged in a line (staggered bolts). This research presents an experimental, numerical, and parametric study of sleeve connection in CHS under centric axial tension. A numerical model was developed using the finite element method (FEM) considering sleeve connection with staggered bolts. From the numerical results, it was possible to analyze the connection behavior and failure modes: yielding gross cross-section, fracture through the effective net area, bolt shear failure, bearing failure of the plate, and bolt bending failure. This way, formulations were proposed to predict the sleeve connections' behavior with staggered bolts as a function of the failure modes.

中文翻译：

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带套筒连接的钢 CHS 的性能和设计公式

摘要 管状结构在土木建筑中因其在拉伸、压缩和扭转下的出色响应而获得了空间。它们广泛用于结构桁架，尤其是大长度的桁架。由于制造和运输过程，型材具有有限的尺寸。因此，需要使用某种机制来进行型材的接合并获得所需的长度。这项工作旨在开发一种称为套筒连接的圆形空心截面 (CHS) 连接中的新型钢筋接头，它由两个管子与另一个直径较小的管子用螺栓排列成一条线（交错螺栓）连接而成。本研究提出了在中心轴向张力下 CHS 套筒连接的实验、数值和参数研究。使用有限元方法 (FEM) 开发了一个数值模型，考虑到交错螺栓的套筒连接。从数值结果中，可以分析连接行为和失效模式：屈服总截面、通过有效净面积的断裂、螺栓剪切失效、板的承载失效和螺栓弯曲失效。通过这种方式，提出了公式来预测带有交错螺栓的套筒连接的行为作为失效模式的函数。