Welded connecton to column
Bending resistance
Binding resistance is calculated using formula
Inner lever arm for welded connection
The tensile resistance Ft,Rd is considered as a minimum of following values:
- Column flange in bending Ft,fc,Rd
- Column web in tension Ft,wc,Rd
The resulting resistance is limited by the resistance of part in compression and the resistance in shear:
- The column web in shear Vwp,Rd/β
- The column web in compression Fc,wc,Rd
Bending stiffness
The initial value of stiffness is calculated using expression:
The expression can be modified for non-linear part of the curve with the help of factor μ. The factor describes the difference between initial and tangential stiffness. The value of the factor is 1.0 in the linear part and is increasing with increasing value of bending moment.
Where is: | z |
|
ψ |
| |
κ |
| |
Med |
|
Components for calculation of stiffness:
| k1, k2, k3 |
| k2, k3 |
| k1, k2, k3 |
Note: Marking corresponds to EN 1993-1-8.
Where is: | k1 |
|
k2 |
| |
k3 |
|
Unstiffened welded connections are considered as ductile, if the required rotation is smaller than ϕCD.min = 0,015 (EN 1993-1-8). Limiting value of rotation may be calculated for welded connections with stiffened web using formula
