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Distribution of temperature in steel and composite beams and joints under natural fire F. Hanus (B.E.S.T. design office) & J.-M. Franssen (Univ. of Liege)

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Presentation on theme: "Distribution of temperature in steel and composite beams and joints under natural fire F. Hanus (B.E.S.T. design office) & J.-M. Franssen (Univ. of Liege)"— Presentation transcript:

1 Distribution of temperature in steel and composite beams and joints under natural fire F. Hanus (B.E.S.T. design office) & J.-M. Franssen (Univ. of Liege) More info on http://hdl.handle.net/2268/66090 Motivation: analysis of connections in cooling phase => calculation of temperatures in steel beam and in joints. Existing « lumped capacitance » method: OK for unprotected steel sections (heating and cooling) OK for protected steel sections (heating) OK for lower half of a steel beam with a slab on the upper flange Not OK for the upper part of the steel beam with a slab

2 New « Heat exchange » method for T in the upper flange. More info on http://hdl.handle.net/2268/66090

3 Given by an equation obtained from curve fitting  with numerical results  based on Annex A of EN 1991-1-2 parametric fire curves Contains 2 parameters During heating During heating and cooling More info on http://hdl.handle.net/2268/66090

4 IPE300IPE550 30’ fire 60’ fire More info on http://hdl.handle.net/2268/66090 Works also for the temperature of the upper flange in the joint region

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