Comparative Experimental Research on the Shear Performance of Bolts and Ring-Groove Rivets
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摘要: 环槽铆钉作为一种新型紧固件,因其优异的性能现已广泛应用于航空航天、轨道交通、桥梁工程和建筑结构等相关领域。在电力铁塔领域,主节点连接处主要使用螺栓连接,受力方式主要为受剪连接。环槽铆钉作为一种新的连接技术,在电力铁塔领域使用较少。为保证关键节点剪切性能满足要求,对8.8级以及同规格的普通螺栓进行了受拉、受剪静力试验与节点抗剪试验,对比两者的单钉性能及其节点连接中的抗剪性能。研究结果表明:环槽铆钉的单钉性能优于普通螺栓,在板材强度、螺孔的间距与边距满足要求的前提下,连接件的承载力取决于环槽铆钉的抗剪强度,其破坏形式为铆钉剪断;板件之间的摩擦力可忽略不计,连接形式属于承压型连接;同规格下环槽铆钉的抗剪性能优于普通螺栓,两者破坏过程中产生的滑移相同;在抗剪承载力方面,环槽铆钉可以代替螺栓在输电铁塔中进行连接。Abstract: As a new type of fastener, ring-groove rivets have been widely used in aerospace, rail transit, bridge engineering, building structures, and other related fields because of their excellent performance. In the field of power towers, the main connections mainly use bolt connections, and the load-bearing mode is mainly shear connection. As a new connection technology, ring-groove rivets are not currently used in the field of power towers. In order to ensure that the shear performance of the main joint meets the requirements, this study conducted shear static tests and joint shear tests on Grade 8.8 ring-groove rivets and ordinary bolts of the same specification, comparing both their single-rivet performance and their shear performance in joint connections. The results showed that the single-rivet performance of the ring-groove rivets was superior to that of the ordinary bolts. Under the premise that the plate strength, hole spacing, and edge distance met the requirements, the bearing capacity of the connectors was determined by the shear strength of the ring-groove rivets, and the failure mode was rivet shear. The friction force between the plates was negligible and the connection form was a pressure-bearing connection. The shear performance of the ring-groove rivets was better than that of the ordinary bolts of the same specification, and the slip generated during the failure process was the same. In terms of shear capacity, ring-groove rivets can replace bolts for connections in transmission towers.
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Key words:
- bolt connection /
- ring-groove rivet /
- mechanical properties /
- failure mode
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