1 Aarhus School of Engineering (ASE), Faculty of Science, Aarhus University, Aarhus University2 Wärtsilä Finland Oy, Vaasa3 Department of Engineering - Civil and Architectural Engineering, Department of Engineering, Science and Technology, Aarhus University4 Department of Engineering - Civil and Architectural Engineering, Department of Engineering, Science and Technology, Aarhus University
Advanced and simplified methods of analysis and design for the fire resistance of structural elements and assemblages of structures have been developed in recent years. Some simplified methods for the fire design of concrete filled tubes have appeared in Eurocode 4 part 1.2. Experience to date indicates that the methods included at present need to be substantially improved for better accuracy and, more important, better safety in some cases. For these reasons, some countries do not permit the use of certain annexes. The paper includes comparative calculations using the methods in Eurocodes on the one hand and other advanced calculation methods on the other hand. The advanced calculation models include accurate heat conduction analysis as well as rigorous application of temperature dependent material mechanical properties in assessing the element strength under fire. The validity of the methods has been calibrated against published test results from a wide range of sources including tests carried out in European and North American countries as well as with more recent tests carried out under the auspices of CIDECT. Among the calculation methods used are the finite element method (software SAFIR), finite difference method (software SOSMEF), as well as spreadsheet implementations of the methods given in Eurocode 4 Part 1.2. The paper concludes that advanced calculation models offer a safe alternative to the simplified design methods in Eurocode 4 Part 1.2 for concrete filled structural hollow sections.
Eurosteel 2011: Proceedings of the 6th European Conference on Steel and Composite Structures, 2011
Composite columns; Concrete Filled SHS; Fire Safety Engineering
Main Research Area:
ECCS European Convention for Constructional Steelwork