Techno Press
You logged in as

Steel and Composite Structures   Volume 12, Number 4, April 2012, pages 325-352
DOI: https://doi.org/10.12989/scs.2012.12.4.325
 
Structural performance of unprotected concrete-filled steel hollow sections in fire: A review and meta-analysis of available test data
David Rush*, Luke Bisby, Allan Jowsey, Athan Melandinos and Barbara Lane

 
Abstract     [Buy Article]
    Concrete filled steel hollow structural sections (CFSs) are an efficient, sustainable, and attractive option for both ambient temperature and fire resistance design of columns in multi-storey buildings and are becoming increasingly common in modern construction practice around the world. Whilst the design of these sections at ambient temperatures is reasonably well understood, and models to predict the strength and failure modes of these elements at ambient temperatures correlate well with observations from tests, this appears not to be true in the case of fire resistant design. This paper reviews available data from furnace tests on CFS columns and assesses the statistical confidence in available fire resistance design models/approaches used in North America and Europe. This is done using a meta-analysis comparing the available experimental data from large-scale standard fire tests performed around the world against fire resistance predictions from design codes. It is shown that available design approaches carry a very large uncertainty of prediction, suggesting that they fail to properly account for fundamental aspects of the underlying thermal response and/or structural mechanics during fire. Current North American fire resistance design approaches for CFS columns are shown to be considerably less conservative, on average, than those used in Europe.
 
Key Words
    concrete filled steel sections; fire resistance; standard fire testing; structural design.
 
Address
David Rush, Luke Bisby : BRE Centre for Fire Safety Engineering, University of Edinburgh, UK
Allan Jowsey : International Paint Ltd, AkzoNobel, Newcastle, UK
Athan Melandinos and Barbara Lane : Arup Fire, London, UK
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2020 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: technop@chol.com