Verification of connection in built-up members
The axial force in the lacing without buckling consideration is given by the following expression
Where is: | Vy |
|
r |
| |
d |
| |
h0 |
|
The resistance of lacing is calculated using formula
Where is: | Ad |
|
fy |
| |
γM0 |
|
Following expression has to be fulfilled
The axial force in the lacing including buckling consideration is given by the following expression
Where is: | Vy |
|
VS |
| |
d |
| |
r |
| |
h0 |
|
The slenderness of the web is estimated according to the following formula:
Where is: | d |
|
Ad |
|
The relative slenderness 
is given by the formula
where is
The value of the imperfection factor α, is set according to the buckling curve c. The factor χSp corresponds to the relative slenderness 
and is calculated using expression
however, this expression has to be fulfilled
where
The buckling resistance of the web is given by the expression
The webs are OK if the following expression is fulfilled:
