Experimental Study on Mechanic Behavior of Flange Joint for Steel Tube Under Axial Tension

IF 3.1 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Buildings Pub Date : 2024-07-24 DOI:10.3390/buildings14082282

Jinyan Si, Wei Liu, Li Zhu, Yaoyu Zhu, Guanyuan Zhao, Jian Hong, Chenmin Zhang

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引用次数: 0

Abstract

The flange joint is an important connection in steel tube structures. In this paper, 11 groups of flange joint tests were conducted to investigate the influences of tube diameter, flange plate thickness, the distance from the bolt to the tube centroid, bolt numbers and material strength on the mechanical behavior. One of two failure modes in tests is that the excessive plastic deformation on the flange plate makes the flange plate lose the bearing capacity; the other is that the steel tube yield makes the joints fail. The results show that the calculating method for flange joint in Chinese design code is so safe that amplifying the calculating results of the code by 1.2 times would be closer to the bearing capacity of specimens. For a flange joint with different tube diameters, thickening the flange plate of thinner tube or thinning the flange plate of another tube are effective to ensure the deformations on both sides of the flange plates are equivalent. The ratio of the bearing capacity of the steel tube to that of flange plate should be greater than 1.7. And the thickness of the flange plate should be thicker than 14mm to reduce the deformation caused by cutting, drilling and welding during manufacturing.

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轴向拉力作用下钢管法兰接头力学行为的实验研究

法兰连接是钢管结构中的一种重要连接方式。本文进行了 11 组法兰连接试验，研究钢管直径、法兰板厚度、螺栓到钢管中心点的距离、螺栓数量和材料强度对力学行为的影响。试验中有两种失效模式，一种是法兰板上过大的塑性变形使法兰板失去承载能力；另一种是钢管屈服使接头失效。结果表明，中国设计规范中的法兰连接计算方法是非常安全的，将规范的计算结果放大 1.2 倍，就会更接近试件的承载能力。对于不同管径的法兰连接，加厚较薄管子的法兰板或减薄另一管子的法兰板可有效确保法兰板两侧的变形量相等。钢管与法兰板的承载能力比应大于 1.7。法兰板的厚度应大于 14 毫米，以减少制造过程中切割、钻孔和焊接造成的变形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Buildings Multiple-

CiteScore

3.40

自引率

26.30%

发文量

1883

审稿时长

11 weeks

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