摘要
为将锁铆连接引入冷弯薄壁型钢结构中构件的连接,对锁铆连接及自攻螺钉连接的试件进行了抗拉、抗剪性能试验,探讨了铆钉端距、基板厚度差、铆钉长度等参数对锁铆连接抗剪性能的影响;基于传染病传播动力学SIR模型建立了铆接本构模型,提出了锁铆连接抗剪承载力设计计算方法。研究结果表明:锁铆连接的主要破坏模式为延性破坏模式,表现为铆钉腿部剥离下层板材并伴随铆钉头部局部脱离上层板材,且刚度、强度和耗能性能均明显优于自攻螺钉连接;所建立的本构模型能够较精确反映锁铆连接荷载-变形曲线的变化趋势,且抗剪承载力的理论值和试验值误差较小;锁铆连接用于冷弯薄壁型钢板间连接时,其组合厚度不宜大于4 mm,厚板与薄板的厚度比不宜大于1.5,锁铆接头的端距应大于2倍铆钉直径。
To introduce self-piercing rivet connection to component connections of cold-formed thin-walled steel structures, shear and tension tests were designed and conducted both on self-piercing rivet connection and self-tapping screw connection specimens. Parameters in terms of end distance, thickness difference between connection components and rivet length were studied and their effects for shearing performances of self-piercing rivet connection were investigated. Based on the SIR model of transmission dynamics of infectious diseases, a constitutive model of riveting was established, and then the shear capacity design calculation method was proposed. The results show that the main failure mode is ductile failure with rivet legs being pulled out and part of rivet head being pulled out. Its stiffness, intensity and energy dissipation are better than the self-tapping screw connection. The established constitutive model can accurately reflect the variable trend of load-deformation curve of the self-piercing rivet connection and the error of shear capacity between theoretical value and experimental value is small. When self-piercing rivet was used in connections between cold-formed thin-walled steel sheets, the thickness of sheets should not be greater than 4 mm, the thickness ratio between thick plate and thin sheet should not be greater than 1.5 and the end distance should be 2 times more than the diameter of the rivet.
出处
《工程力学》
EI
CSCD
北大核心
2017年第8期133-143,共11页
Engineering Mechanics
基金
国家自然科学基金项目(51678008
51378039
51421005
91315301-03)
关键词
锁铆连接
冷弯薄壁型钢
抗剪性能
本构模型
设计计算方法
self-piercing rivet
cold-formed thin-walled steel
shearing performances
constitutive model
design calculation method
