Abstract This study aims to understand the behavior of bolted L shape sleeve joint connecting two Cold-Formed Steel (CFS) channel sections. A total of thirty-two specimens were experimentally tested under three-point bending. Three different series namely, (A) control specimen with two different span lengths, (B) sleeved specimen with the flange of sleeve connector capping the compression zone, and (C) sleeved specimen with the flange of sleeve connector capping the tension zone were tested. The parameters considered in this study include (i) the span length (Lt), (ii) sleeve length to section depth ratio (β), and (iii) thickness of sleeve connector (LS). The experimental results revealed that the ultimate moment resistance of specimens with a 2.5 mm thick sleeve connector was 19 to 73% higher than 2.0 mm thick sleeve specimens. The moment capacity of series C specimens was about 90–103% of that of the series B specimens. Based on the experimental results, design predictor equations were suggested to determine the moment resistance of sleeve specimens with respect to β. In addition, reliability studies were done for test series B to determine the safety and resistance factors for allowable strength design (ASD) method and load and resistance factor design (LRFD) method respectively. The equivalent and design uniformly distributed load (UDL) was determined based on the combined effect of shear and bending.

中文翻译：

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CFS唇形槽道段螺栓L形套筒接头极限强度试验研究

摘要 本研究旨在了解连接两个冷弯型钢 (CFS) 通道截面的螺栓 L 形套筒接头的行为。在三点弯曲下对总共 32 个试样进行了实验测试。测试了三个不同系列，即（A）具有两种不同跨距长度的控制试样，（B）套筒连接器法兰盖住压缩区的套筒试样，和（C）套筒连接器法兰盖住拉伸区的套筒试样. 本研究中考虑的参数包括 (i) 跨度 (Lt)、(ii) 套筒长度与截面深度比 (β) 和 (iii) 套筒连接器 (LS) 的厚度。实验结果表明，具有 2.5 mm 厚套筒连接件的试样的极限力矩阻力比 2.0 mm 厚套筒试样高 19% 至 73%。C 系列试样的弯矩承载力约为 B 系列试样的 90-103%。根据实验结果，提出了设计预测方程来确定套筒试样相对于 β 的力矩阻力。此外，还对测试系列 B 进行了可靠性研究，以确定允许强度设计 (ASD) 方法和载荷和阻力系数设计 (LRFD) 方法的安全系数和阻力系数。等效和设计均布载荷 (UDL) 是基于剪切和弯曲的综合效应确定的。对测试系列 B 进行了可靠性研究，以确定允许强度设计 (ASD) 方法和载荷和阻力系数设计 (LRFD) 方法的安全系数和阻力系数。等效和设计均布载荷 (UDL) 是基于剪切和弯曲的综合效应确定的。对测试系列 B 进行了可靠性研究，以确定允许强度设计 (ASD) 方法和载荷和阻力系数设计 (LRFD) 方法的安全系数和阻力系数。等效和设计均布载荷 (UDL) 是基于剪切和弯曲的综合效应确定的。