System and Loading
Flexural Buckling Design Around the Minor Axis
The effective length of the hinged column is Lcr = 3.50 m.
According to EN 1993-1-1, 6.3.1.2:
Selection of the buckling curve according to Table 6.2:
Instability perpendicular to the z-axis: Buckling stress curve BSCz: b
Table 6.1 shows the imperfection factor α = 0.34.
For I-, H-, and rectangular hollow cross-sections that are only subjected to compression, the coefficient kzy = 0 may be assumed.
This results in the design as follows:
→ Design is fulfilled.
Fire resistance design
The final temperature is defined as 500 degrees.
Determine reduction factors:
ky,Θ = 0.78 Table 3.1
kE,Θ = 0.60 Table 3.1
Design under fire exposure according to Clause 4.2.3.2
Imperfection factor:
Dimensionless relative slenderness:
Auxiliary factor:
Reduction factor for flexural buckling under fire exposure:
Buckling resistance of structural component subjected to compression:
Loading in case of fire:
Design:
→ Design is fulfilled.
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