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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。
In order to connect the riveted joints into the cold-formed thin-walled steel structures, the tensile and shear-resistance performances of the riveted joints and self-tapping screws were studied. The effects of rivet end distance, Length and other parameters on the shear performance of the rivet joint. Based on the SIR model of the infectious disease propagation dynamics, a riveted constitutive model was established and the calculation method for the shear strength of the rivet joint was put forward. The results show that the main failure mode of the rivet joint is the ductile failure mode, which is manifested as that the rivet legs peel off the lower plate and accompany the head of the rivet partly separated from the upper plate, and the stiffness, strength and energy dissipation performance are obviously better than the self-tapping screw connection The constitutive model established can reflect the trend of load-deformation curve of the riveting connection more accurately, and the theoretical value and the experimental value of the shear capacity are less. The riveting connection is used to connect the cold-formed thin- , The thickness of the combination should not be larger than 4 mm, the thickness ratio of the thick plate to the thin plate should not be larger than 1.5, and the end distance of the lock rivet joint should be greater than 2 times the rivet diameter.