Fire behaviour of concrete filled elliptical steel columns
Author(s)
Espinos, Ana
Gardner, Leroy
Romero, Manuel L
Hospitaler, Antonio
Type
Journal Article
Abstract
In this work, a non-linear three-dimensional finite element model is presented in order to study the behaviour of axially loaded concrete filled elliptical hollow section (CFEHS) columns exposed to fire. This study builds on previous work carried out by the authors on concrete filled circular hollow section (CFCHS) columns both at room temperature and in fire. The numerical model is first validated at room temperature against a series of experiments on CFEHS stub columns available in the literature and subsequently extended to study the performance of slender columns at elevated temperatures. The aim of this work is to understand and represent the behaviour of axially loaded CFEHS columns in fire situations and to compare their effectiveness with that of the circular concrete filled tubular (CFT) columns. Parametric studies to explore the influence of variation in global member slenderness, load level, cross-section slenderness and section size are presented. Finally, guidance on the fire design of CFEHS columns is proposed: it is recommended to follow the guidelines of Clause 4.3.5.1 in EN 1994-1-2, but employing the flexural stiffness reduction coefficients established in the French National Annex with an equivalent EHS diameter equal to P/π, where P is the perimeter of the ellipse.
Date Issued
2011-02-01
Date Acceptance
2010-10-14
Citation
Thin Walled Structures, 2011, 49 (2), pp.239-255
ISSN
0263-8231
Publisher
Elsevier
Start Page
239
End Page
255
Journal / Book Title
Thin Walled Structures
Volume
49
Issue
2
Copyright Statement
© 2010 Elsevier Ltd. All rights reserved.
Sponsor
Engineering & Physical Science Research Council (E
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000287630900002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/G003556/1
Subjects
Science & Technology
Technology
Engineering, Civil
Engineering, Mechanical
Mechanics
Engineering
Fire resistance
Composite columns
Concrete filled steel tubes
Elliptical hollow sections
Finite element analysis
Simple calculation model
HOLLOW SECTIONS
TUBULAR COLUMNS
STUB COLUMNS
RESISTANCE
STRENGTH
DESIGN
TUBES
MODEL
Publication Status
Published
Date Publish Online
2010-11-26