Reducing design steel temperature by accurate temperature calculation
Abstract
In this paper an un-insulated I-beam (HE400B) supporting a concrete slab was analyzed. The steel temperature was calculated with the simplest approach according to EC 3 and compared to temperatures calculated considering the cooling by the concrete. In addition the so called shadow effect was considered. The I-beam is then assumed not fully exposed to the incident radiation from the fire as the surfaces between the flanges will be partly shadowed. Temperatures of the I-beam after a fire exposure of 30 minutes was calculated and discussed. The calculations were performed with the finite element code Tasef(Sterner et al, 1990). The mean temperatures of the beam flanges were reduced by more than 200 °C (from 827 °C to 609 °C) when the cooling at the top of the beam and shadow effects were considered. The structure was supposed to be exposed to the standard time-temperature conditions according to EN1363-1 or ISO 834.Downloads
Published
Issue
Section
License
Authors who publish with ASFE agree to the following terms:
1. Authors retain copyright and grant the ASFE right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
