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 transcript:

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 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

New « Heat exchange » method for T in the upper flange. More info on

Given by an equation obtained from curve fitting  with numerical results  based on Annex A of EN parametric fire curves Contains 2 parameters During heating During heating and cooling More info on

IPE300IPE550 30’ fire 60’ fire More info on Works also for the temperature of the upper flange in the joint region

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