Calculate the steel beam column buckling resistance to compressive axial loads with this EN1993-1-1 compliant tool. This calculation checks the flexural, torsional and flexural-torsional capacity.
Required class:
-
Applied class:
-
Strong axis (Lcr,y):
5000 mm
Weak axis (Lcr,z):
5000 mm
Torsional (Lcr,T):
5000 mm
Flexural buckling about axis y-y (Nb,Rd,y):
- kN
Flexural buckling about axis z-z (Nb,Rd,z):
- kN
Torsional buckling (Nb,Rd,T):
- kN
Torsional-flexural buckling (Nb,Rd,TF):
- kN
Unity check buckling:
-
| Parameter name | Symbol | Unit | Info text |
|---|---|---|---|
| Design axial force | NEd | kN | Design compressive force. |
| Length | L | mm | Total beam length. |
| Buckling length factor | ky, kz | - | Buckling length factor for bucling about y-y and z-z axis. Theoretical value of k varies between 0.5 and 2. It is possible to have lateral restains supporting the weak axis (z-z) of the beam. This would result in having a lower k_z factor than what is theoretically possible to reflect this. |
| Torsional buckling length factor | kT | - | This factor accounts for the influence of the end support conditions on the member its effective length for torsional buckling. Theoretical value of k varies between 0.5 and 2 and generally, it is the same as k_y. |
| Distance support to shear center | dz | mm | Distance from lateral restraint to the shear center. This lateral restraint reduces the buckling length about the z-z axis. |
| Partial factor for stability | γM1 | - | Partial factor for stability |
| Buckling length | Lcr,y, Lcr,z | mm | Buckling length about y-y and z-z axis. |
| Torsional buckling length | Lcr,T | mm | Torsional buckling length of the unrestrained flange. |
| Design buckling resistance | Nb,Rd | kN | Design buckling resistance (lowest) |
| Design flexural buckling resistance (y-y) | Nb,Rd,y | kN | Design buckling resistance (flexural y-y) |
| Design flexural buckling resistance (z-z) | Nb,Rd,z | kN | Design buckling resistance (flexural z-z) |
| Design torsional buckling resistance | Nb,Rd,T | kN | Design buckling resistance (torsional) |
| Design torsional-flexural buckling resistance | Nb,Rd,TF | kN | Design buckling resistance (torsional-flexural) |
| Unity check | UC | The ratio of the design load to the lowest design buckling resistance. A value less than or equal to 1.0 indicates that the design is acceptable under the given load. |