Numerical Modelling of the Influence of Joint Typologies on the 3D Behaviour of a Steel Sub-Frame Under a Natural Fire

In order to address the complex loading condition of steel joints in fire, and based on the experimental fire tests on steel frames with different joint typologies, performed at the University of Coimbra (Santiago et al. 2008), a detailed three-dimensional model was developed and calibrated to simulate the behaviour of welded and bolted end plate beam-to-column joints. The structural frame is modeled combining 3D shell, solid and joint elements, thereby taking into account the effect of the local failure modes, and the realistic behaviour of the frame exposed to a natural fire. The numerical model accounts for the initial geometrical imperfections, non-linear temperature gradient, geometrical and material nonlinearity and temperature dependent material properties. The results show the performance of each individual structural joint component under heating and cooling conditions and identify the main dependencies of the geometrical and mechanical variables of the components on the joint behaviour. The global behaviour of the frame and the joint failure modes are compared and discussed with the experimental observations.

[1]  Khalifa S. Al-Jabri,et al.  Behaviour of steel and composite beam-column connections in fire , 1998 .

[2]  R M Richard,et al.  THE ANALYSIS AND DESIGN OF SINGLE PLATE FRAMING CONNECTIONS , 1980 .

[3]  Bre,et al.  ELEVATED-TEMPERATURE MOMENT-ROTATION TESTS ON STEELWORK CONNECTIONS. , 1997 .

[4]  M. A O'Connor,et al.  Behaviour of a Multi-storey Steel Framed Building Subjected to Fire Attack , 1998 .

[5]  Mustafa Mahamid,et al.  The effect of fire loading on a steel frame and connection , 2004 .

[6]  Yong Wang,et al.  Analysis of catenary action in steel beams using a simplified hand calculation method, Part 1: theory and validation for uniform temperature distribution , 2005 .

[7]  Guo-Qiang Li,et al.  Experimental studies on the material properties of high-strength bolt connection at elevated temperatures , 2002 .

[8]  T.C.H. Liu.  Finite element modelling of behaviours of steel beams and connections in fire , 1996 .

[9]  Ian Burgess,et al.  Finite element modelling of steel fin plate connections in fire , 2007 .

[10]  Fernando A. Branco,et al.  STUDY OF THE CHIADO FIRE IN LISBON. , 1995 .

[11]  Luís Simões da Silva,et al.  Experimental investigation of the behaviour of a steel sub-frame under a natural fire , 2008 .

[12]  M. A. Hirt,et al.  Construction métallique : notions fondamentales et méthodes de dimensionnement , 1994 .

[13]  Aldina Santiago.  Behaviour of beam-to-column steel joints under natural fire , 2008 .

[14]  Aldina Santiago,et al.  Experimental behaviour of a steel structure under natural fire , 2006 .

[15]  Chanakya Arya,et al.  Eurocode 3: Design of steel structures , 2018, Design of Structural Elements.

[16]  D. A. Nethercot,et al.  Designer's guide to EN 1993-1-1 : Eurocode 3: Design of Steel Structures : General Rules and Rules for Buildings /L. Gardner and D. A. Nethercot , 2005 .

[17]  Ulf Wickström,et al.  Comments on calculation of temperature in fire-exposed bare steel structures in prEN 1993-1-2: Eurocode 3—design of steel structures—Part 1–2: general rules—structural fire design , 2005 .

[18]  O. M El-Houssieny,et al.  Behavior of extended end plate connections at high temperature , 1998 .

[19]  Khalifa S. Al-Jabri,et al.  Modelling of unstiffened flush end-plate bolted connections in fire , 2006 .

[20]  C. Brebbia,et al.  High Performance Structures and Materials II , 2004 .

[21]  René Walther.  Traité de génie civil de l'Ecole polytechnique fédérale de Lausanne , 1989 .

[22]  L. Sim.  Towards a consistent design approach for steel joints under generalized loading , 2008 .

[23]  Colin Bailey,et al.  The behaviour of full-scale steel-framed buildings subjected to compartment fires , 1999 .

[24]  L. Simões da Silva.  Towards a consistent design approach for steel joints under generalized loading , 2008 .

[25]  T Lennon,et al.  Moment–rotation–temperature curves for semi-rigid joints , 2005 .

[26]  Ian Burgess,et al.  FINITE ELEMENT MODELLING OF FIN PLATE STEEL CONNECTIONS IN FIRE , 2007 .