Gan Tang, Yanbo Qu, Jian Zhang, Lingfeng Yin, Junchun Dou
{"title":"Experimental Research on Mechanical Properties of Connection Joint Between Inclined Strut and Column in Steel Storage Rack","authors":"Gan Tang, Yanbo Qu, Jian Zhang, Lingfeng Yin, Junchun Dou","doi":"10.1007/s13296-024-00902-y","DOIUrl":null,"url":null,"abstract":"<div><p>The column plate of steel storage rack is a plane truss system which is connected by two columns and diagonal braces. The connection joint of braces and columns (brace-column connection joint) is often the weak part of the column plate and even the whole steel shelf. In practical engineering, the strengthening measures are mainly to change the cross-section form of braces and weld the thick plate. This paper mainly studies the influence of spot welding thick plate on the mechanical properties of brace-column joints. Firstly, 24 kinds of brace-column connection joints are designed according to the number of welding spot, the distance between welding spot and the thickness of thick plate. The axial tensile tests are carried out on the 24 kinds of connection joints and 72 test-pieces, and the test phenomena, load–displacement curve, load-strain curve and parameter influence of each group of specimens are detailed comparative analysis. Secondly, the three-dimensional finite element model of each test piece is established. According to the finite element results and test results, the bearing capacity, load–displacement curve, stress distribution and the influence of welding spot strength are compared and analyzed. Finally, the parametric analysis of brace-column joints is carried out, and the influence of the number of welding spot, the distance between the welding points and the thickness of the thick plate on the mechanical properties of the joint is studied. The design formula of the spot welding connection is obtained by modifying the design formula of the fillet weld strength in the code, which provides a reference for the application of this type of joint in the practical engineering.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"25 1","pages":"174 - 188"},"PeriodicalIF":1.1000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Steel Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s13296-024-00902-y","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The column plate of steel storage rack is a plane truss system which is connected by two columns and diagonal braces. The connection joint of braces and columns (brace-column connection joint) is often the weak part of the column plate and even the whole steel shelf. In practical engineering, the strengthening measures are mainly to change the cross-section form of braces and weld the thick plate. This paper mainly studies the influence of spot welding thick plate on the mechanical properties of brace-column joints. Firstly, 24 kinds of brace-column connection joints are designed according to the number of welding spot, the distance between welding spot and the thickness of thick plate. The axial tensile tests are carried out on the 24 kinds of connection joints and 72 test-pieces, and the test phenomena, load–displacement curve, load-strain curve and parameter influence of each group of specimens are detailed comparative analysis. Secondly, the three-dimensional finite element model of each test piece is established. According to the finite element results and test results, the bearing capacity, load–displacement curve, stress distribution and the influence of welding spot strength are compared and analyzed. Finally, the parametric analysis of brace-column joints is carried out, and the influence of the number of welding spot, the distance between the welding points and the thickness of the thick plate on the mechanical properties of the joint is studied. The design formula of the spot welding connection is obtained by modifying the design formula of the fillet weld strength in the code, which provides a reference for the application of this type of joint in the practical engineering.
期刊介绍：
The International Journal of Steel Structures provides an international forum for a broad classification of technical papers in steel structural research and its applications. The journal aims to reach not only researchers, but also practicing engineers. Coverage encompasses such topics as stability, fatigue, non-linear behavior, dynamics, reliability, fire, design codes, computer-aided analysis and design, optimization, expert systems, connections, fabrications, maintenance, bridges, off-shore structures, jetties, stadiums, transmission towers, marine vessels, storage tanks, pressure vessels, aerospace, and pipelines and more.
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