{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T19:13:39Z","timestamp":1762542819579,"version":"3.41.2"},"reference-count":24,"publisher":"Emerald","issue":"1","license":[{"start":{"date-parts":[[2019,2,28]],"date-time":"2019-02-28T00:00:00Z","timestamp":1551312000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JSFE"],"published-print":{"date-parts":[[2019,2,28]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-subheading\">Purpose<\/jats:title><jats:p>Nowadays, circular concrete-filled tubular (CFT) columns are largely used in construction because of structural and architectural advantages such as high load bearing capacity and aesthetic appearance. The behavior of CFT columns at ambient and high temperatures is good; however, there are problems related to their behavior in fire when inserted in a real building structure, as for example, the influence of the restraining to thermal elongation that have to be addressed in order to improve their design. This study aims to present the results of a numerical study on the behavior of CFT columns with restrained thermal elongation in case of fire.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Design\/methodology\/approach<\/jats:title><jats:p>The parameters tested in the numerical simulations included column slenderness, load level, surrounding structure stiffness and steel reinforcement ratio. A sequentially coupled thermal stress analysis was carried out. The numerical model was validated with results from a large series of fire resistance tests carried out at Coimbra University, in Portugal. From these, simple equations to evaluate CFT column critical times were derived.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Findings<\/jats:title><jats:p>The results were also compared with the ones obtained from the current EN 1994-1-2:2005 simplified calculation and tabulated data methods. For the analyzed cases, it was verified that, while the simplified calculation method led to safe results on the evaluation of the fire resistance of CFT columns with restrained thermal elongation, the tabulated data method led, in certain cases, to unsafe results. This research showed also lower critical times than those from literature on similar type of columns.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Originality\/value<\/jats:title><jats:p>The influence of the stiffness of the surrounding structure on the behavior of CFT columns subjected to fire was not yet clear in the major part of the studies already carried out. So, this paper has the originality to consider this parameter in the numerical simulations of this type of columns.<\/jats:p><\/jats:sec>","DOI":"10.1108\/jsfe-06-2017-0036","type":"journal-article","created":{"date-parts":[[2018,3,26]],"date-time":"2018-03-26T09:49:38Z","timestamp":1522057778000},"page":"2-23","source":"Crossref","is-referenced-by-count":2,"title":["Numerical analysis on circular concrete-filled tubular columns subjected to fire"],"prefix":"10.1108","volume":"10","author":[{"given":"Tiago A. de C.","family":"Pires","sequence":"first","affiliation":[]},{"given":"Jo\u00e3o Paulo C.","family":"Rodrigues","sequence":"additional","affiliation":[]},{"given":"Jose J.R.","family":"Silva","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"volume-title":"Abaqus User\u00b4s Manual: volumes I-III, Version 6.7","year":"2005","author":"Abaqus","key":"key2020092506282450100_ref001"},{"issue":"1\/3","key":"key2020092506282450100_ref002","first-page":"305","article-title":"The effect of axial restraint on the fire resistance of steel columns","volume":"46","year":"1998","journal-title":"Journal of Constructional Steel Research"},{"article-title":"Experimental studies on the fire resistance of hollow steel columns filled with bar-reinforced concrete","volume-title":"IRC Internal Report n\u00b0628","year":"1992","key":"key2020092506282450100_ref003"},{"issue":"10","key":"key2020092506282450100_ref004","doi-asserted-by":"crossref","first-page":"1086","DOI":"10.1016\/j.jcsr.2007.09.014","article-title":"Realistic modelling of thermal and structural behaviour of unprotected concrete filled tubular columns in fire","volume":"64","year":"2008","journal-title":"Journal of Constructional Steel Research"},{"volume-title":"Actions on Structures. 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(1992), \u201cStructural fire protection\u201d, Manuals and Reports on Engineering Practice, 78, ASCE-American Society of Civil Engineers.","DOI":"10.1061\/9780872628885"},{"issue":"5","key":"key2020092506282450100_ref018","doi-asserted-by":"crossref","first-page":"1489","DOI":"10.1061\/(ASCE)0733-9445(1994)120:5(1489)","article-title":"Fire resistance of circular steel columns filled with Bar-reinforced concrete","volume":"120","year":"1994","journal-title":"Journal of Structural Engineering"},{"issue":"1","key":"key2020092506282450100_ref019","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1061\/(ASCE)0733-9445(1996)122:1(30)","article-title":"Fire resistance of steel columns filled with Bar-reinforced concrete","volume":"122","year":"1996","journal-title":"Journal of Structural Engineering"},{"issue":"8","key":"key2020092506282450100_ref020","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1016\/S0379-7112(02)00029-2","article-title":"Thermal restraint and fire resistance of columns","volume":"37","year":"2002","journal-title":"Fire Safety Journal"},{"key":"key2020092506282450100_ref021","first-page":"82","article-title":"Fire resistance of concrete filled circular hollow columns with restrained thermal elongation","volume":"77","year":"2012","journal-title":"Journal of Structural Steel Research"},{"issue":"2","key":"key2020092506282450100_ref022","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/S0379-7112(00)00018-7","article-title":"Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation","volume":"35","year":"2000","journal-title":"Fire Safety Journal"},{"issue":"8\/9","key":"key2020092506282450100_ref023","first-page":"1794","article-title":"Fire behaviour of hollow structural section steel columns filled with high strength concrete","volume":"65","year":"2009","journal-title":"Journal of Constructional Steel Research"},{"issue":"3","key":"key2020092506282450100_ref024","first-page":"310","article-title":"Fire resistance of steel columns with elastically restrained axial elongation and bending","volume":"52","year":"1999","journal-title":"Journal of Structural Steel Research"}],"container-title":["Journal of Structural Fire Engineering"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/JSFE-06-2017-0036\/full\/xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/JSFE-06-2017-0036\/full\/html","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T22:23:17Z","timestamp":1753395797000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.emerald.com\/jsfe\/article\/10\/1\/2-23\/249846"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,2,28]]},"references-count":24,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2019,2,28]]}},"alternative-id":["10.1108\/JSFE-06-2017-0036"],"URL":"https:\/\/doi.org\/10.1108\/jsfe-06-2017-0036","relation":{},"ISSN":["2040-2317"],"issn-type":[{"type":"print","value":"2040-2317"}],"subject":[],"published":{"date-parts":[[2019,2,28]]}}}