冷弯薄壁型钢锁铆连接力学性能及其本构模型研究

发布时间：2018-01-11 03:02

本文关键词：冷弯薄壁型钢锁铆连接力学性能及其本构模型研究　出处：《工程力学》2017年08期 　论文类型：期刊论文

【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。
[Abstract]:In order to introduce the lock riveting connection into the connection of the cold-formed thin-walled steel structure, the tensile and shear properties of the lock riveting connection and the self-tapping screw connection are tested, and the end distance of the rivets and the thickness difference of the base plate are discussed. The influence of rivet length and other parameters on shear resistance of lock riveting connection; Based on the SIR model of infectious disease propagation dynamics, a riveted constitutive model is established, and the design method of shear bearing capacity of lock riveting connection is proposed. The results show that the main failure mode of lock riveting connection is ductile failure mode. The results show that the rivet leg peeling off the lower layer and accompanying the head of the rivet detach from the upper layer, and the stiffness, strength and energy dissipation performance of the rivet are obviously superior to those of the self-tapping screw connection. The constitutive model can accurately reflect the change trend of load-deformation curve of lock riveting connection, and the error of theoretical value and test value of shear capacity is small. When locking riveting connection is used to connect cold-formed thin-walled steel plate, its combined thickness should not be more than 4 mm, thickness ratio of thick plate to thin plate should not be greater than 1.5, and end distance of lock riveting head should be more than 2 times of rivet diameter.
【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(51678008,51378039,51421005,91315301-03)
【分类号】：TU392.1
【正文快照】： 冷弯薄壁型钢结构住宅体系在国内外得到了广泛的应用与推广,近年来,该体系以提高可靠度、舒适度、工业流水线生产效率、装配化程度,降低整体造价为研究目标[1 2]。目前,自攻螺钉连接是冷弯薄壁型钢结构住宅体系中主要的连接方式之一,常用于墙体、楼板、屋架等板材与轻钢龙骨

【相似文献】