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Autodesign of steel fire resistance check is the same part as the Autodesign located in the standard Steel > ULS Check > Check - Fire resistance.
When the user clicks on action button Autodesign then the following dialogue is opened. The dialogue is a bit different from the one used in the general Autodesign, but the functionality is the same.
Let us consider a very simple example of a steel beam with HEB400 cross-section for Autodesign. The structure is subject to the uniform load and to the axial force at one end. The aim of this example is to find the optimal height of the cross-section.
The accidental combination has to be defined. The fire resistance data are used as defined on the following figure.
The Autodesign function is defined for HEB400 cross-section. The cross-section is rolled therefore the properties of Autodesign for rolled cross-section are used. You can see the settings for CS1 – Tube,
Autodesign of both cross-sections can be run in one step using Autodesign all.
The results are automatically printed in preview.
The comparison of initial and optimized values of cross-section is clear from the following table. Initially HEB400 was used and the optimal cross-section is HEB300.
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Optimized |
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Evaluation of the rolled cross-section unity check along the beam is compared in the following figures. The first figure together with table is for the initial cross-section.
The second figure together with table is for the optimized cross-section.
Evaluation of steel check for optimized cross-section dimensions
