冷弯薄壁型钢结构多颗锁铆连接受剪性能试验研究

发布时间：2018-02-28 13:34

本文关键词： 锁铆连接冷弯薄壁型钢受剪性能力学模型铆钉群折减效应计算方法　出处：《建筑结构学报》2017年10期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:This paper introduces the lock riveting connection into the connection between the cold-formed thin-walled steel structure members, taking into account the rivet end distance, spacing, quantity, arrangement and other factors, tests the shear performance of the lock riveting connection, and studies the load-deformation curve of each specimen. Based on the SIR model of infectious disease transmission dynamics, the mechanical model of single lock riveting connection is established. Considering the reduction effect of rivets, a method for calculating the shear capacity of multiple locking riveting connections is proposed. The results show that the failure of multiple locking riveting joints is mainly caused by rivet legs stripping off the lower layer plate and riveting head from the upper layer plate. The net section of steel plate is broken, in which the former is an ideal ductile failure mode, the rivet arrangement mode, end distance and spacing have great influence on the shear performance of lock riveting connection, rivets should be arranged longitudinally, end spacing, The spacing should not be less than 3 times and 5 times of the diameter of rivets, and the calculation method of shear bearing capacity considering the effect of group reduction of rivets has higher prediction accuracy.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点试验室;
【基金】：国家自然科学基金项目(51678008)
【分类号】：TU392.1

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