{"title":"不同纤度比下混凝土填充圆钢管柱轴向承载能力的实验和有限元法研究","authors":"Fethullah Uslu, Kıvanç Taşkın","doi":"10.1007/s13296-024-00842-7","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, a total of 70 experiment specimens, 56 of circular cross-section concrete filled steel tube (CFST) columns and 14 hollow steel tubes with various geometric and material properties, were tested under axial loading. Composite columns with four different concrete compressive strength (<i>f</i><sub><i>c</i></sub>), three different diameter/thickness (<i>D</i>/<i>t</i>) ratio and seven different length/diameter (<i>L</i>/<i>D</i>) ratio used in the experiment samples were designed. The ultimate axial force, axial deformation, and failure modes of the CFST columns obtained from the experiment results were determined. Concrete contribution Ratio index, and strength index were determined from the test results obtained. The ultimate axial force of CFST columns were compared with standards such as AISC360-16 and Eurocode 4. Finally, the finite element (FE) model is proposed to predict the ultimate axial force and behaviour of CFST columns. According to the results obtained, the ultimate axial force of the CFST columns increased as the fc and <i>D</i>/<i>t</i> ratio increased, while the ultimate axial force decreased as the <i>L</i>/<i>D</i> ratio increased. According to the experiment results, it has been seen that the ultimate axial force of the CFST columns is closer to the Eurocode 4 standard. The results obtained from the FE models were calculated on mean 5% more than the experimental results.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"619 - 634"},"PeriodicalIF":1.1000,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental and Finite Element Method Investigation of Axial Load Carrying Capacity of Concrete Filled Circular Steel Tube Columns According to Different Slenderness Ratios\",\"authors\":\"Fethullah Uslu, Kıvanç Taşkın\",\"doi\":\"10.1007/s13296-024-00842-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, a total of 70 experiment specimens, 56 of circular cross-section concrete filled steel tube (CFST) columns and 14 hollow steel tubes with various geometric and material properties, were tested under axial loading. Composite columns with four different concrete compressive strength (<i>f</i><sub><i>c</i></sub>), three different diameter/thickness (<i>D</i>/<i>t</i>) ratio and seven different length/diameter (<i>L</i>/<i>D</i>) ratio used in the experiment samples were designed. The ultimate axial force, axial deformation, and failure modes of the CFST columns obtained from the experiment results were determined. Concrete contribution Ratio index, and strength index were determined from the test results obtained. The ultimate axial force of CFST columns were compared with standards such as AISC360-16 and Eurocode 4. Finally, the finite element (FE) model is proposed to predict the ultimate axial force and behaviour of CFST columns. According to the results obtained, the ultimate axial force of the CFST columns increased as the fc and <i>D</i>/<i>t</i> ratio increased, while the ultimate axial force decreased as the <i>L</i>/<i>D</i> ratio increased. According to the experiment results, it has been seen that the ultimate axial force of the CFST columns is closer to the Eurocode 4 standard. The results obtained from the FE models were calculated on mean 5% more than the experimental results.</p></div>\",\"PeriodicalId\":596,\"journal\":{\"name\":\"International Journal of Steel Structures\",\"volume\":\"24 3\",\"pages\":\"619 - 634\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-05-07\",\"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/s13296-024-00842-7\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Steel Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s13296-024-00842-7","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}
Experimental and Finite Element Method Investigation of Axial Load Carrying Capacity of Concrete Filled Circular Steel Tube Columns According to Different Slenderness Ratios
In this study, a total of 70 experiment specimens, 56 of circular cross-section concrete filled steel tube (CFST) columns and 14 hollow steel tubes with various geometric and material properties, were tested under axial loading. Composite columns with four different concrete compressive strength (fc), three different diameter/thickness (D/t) ratio and seven different length/diameter (L/D) ratio used in the experiment samples were designed. The ultimate axial force, axial deformation, and failure modes of the CFST columns obtained from the experiment results were determined. Concrete contribution Ratio index, and strength index were determined from the test results obtained. The ultimate axial force of CFST columns were compared with standards such as AISC360-16 and Eurocode 4. Finally, the finite element (FE) model is proposed to predict the ultimate axial force and behaviour of CFST columns. According to the results obtained, the ultimate axial force of the CFST columns increased as the fc and D/t ratio increased, while the ultimate axial force decreased as the L/D ratio increased. According to the experiment results, it has been seen that the ultimate axial force of the CFST columns is closer to the Eurocode 4 standard. The results obtained from the FE models were calculated on mean 5% more than the experimental results.
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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