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将锁铆连接引入冷弯薄壁型钢结构构件间的连接中,考虑了铆钉端距、间距、数量、排列方式等因素,对锁铆连接的受剪性能进行试验,研究了各试件的荷载-变形曲线、受剪承载力及破坏模式。基于传染病传播动力学SIR模型,建立了单颗锁铆连接力学模型,并考虑铆钉群折减效应提出了多颗锁铆连接的受剪承载力计算方法。研究结果表明:多颗锁铆连接的破坏主要为铆钉腿部剥离下层板材并伴随铆钉头部脱离上层板材、钢板净截面拉断,其中前者为较理想的延性破坏模式;铆钉排列方式、端距和间距对锁铆连接的受剪性能影响较大,铆钉应优先纵向排列,端距、间距不宜小于3倍与5倍铆钉直径;考虑铆钉群折减效应的受剪承载力计算方法具有较高的预测精度。
The riveting connection is introduced into the connection between the cold-formed thin-walled steel structure components, considering the rivets end distance, spacing, number, arrangement and other factors, the shear performance of the rivet connection is tested, the load of each specimen Deformation Curve, Shear Capacity and Failure Mode. Based on the SIR model of infectious disease propagation dynamics, a mechanical model of single riveting connection was established, and the calculation method of shear capacity of multiple riveted joints was proposed considering the reduction effect of rivets. The results show that the failure of multiple rivet joints is mainly because the rivet legs peel off the lower plate and the head of the rivet is separated from the upper plate and the net section of the plate is pulled off. The former is the ideal ductile failure mode. The arrangement of rivets, And the spacing of the riveting joints have a greater impact on the shear performance, rivets should be preferentially arranged longitudinally, end spacing and spacing should not be less than 3 times and 5 times the rivet diameter; considering the reduction effect of the rivet group shear bearing capacity calculation method has a higher The prediction accuracy.