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Project file: Benchmark_(EC_EN_1993)_31.esa
SCIA Engineer Version R18.1
This benchmark concerns the example SX047a-EN-EU Fire design of protected IPE section beam exposed to parametric fire curve of Access Steel, http://www.access-steel.com/, 2006.
This worked illustrates the fire design of a simply supported non-composite beam. Heat transfer into the section is calculated using the equation for protected members given in EN1993-1-2, which is evaluated using an iterative calculation procedure. The structural resistance is calculated using the simple calculation model for members in bending, given in EN1993-1-2.
A steel beam forms part of a floor structure of an office building. The beam is uniformly load and restrained against lateral torsional buckling by a concrete slab. The beam is required to achieve 60 minutes fire resistance and will be fire protected using sprayed vermiculite cement. The thermal actions will be determined using the parametric temperature - time curve.
The reference gives following results:
| Fire situation | |
| Ap/V | 188 m^-1 |
| Ɵg at 42,5 min | 562,1 °C |
| Ɵa,t at 42,5 min | 582,5 °C |
| ky,Ɵ | 0,525 |
Classification:
|
Flanges |
|
| c/tf | 5,3 |
| Class 1 limit | 7,07 |
| => Flanges Class 1 | |
| Web | |
| c/tw | 35 |
| Class 1 limit | 56,6 |
| => Web Class 1 | |
| Shear resistance | |
| Av,z | 2568 mm² |
| Vfi,t,Rd | 214,1 kN |
| Bending resistance | |
| κ1 | 0,85 |
| κ2 | 1,0 |
| Mfi,t,Rd | 106,7 kNm |
