| General parameters |
| Setting | Description |
|---|
|
Air density
|
The air density ρ is set to the fixed value of 1.25 kg/m3 (=0.00125 t/m3). |
|
Design wind speed with/without traffic
|
A wind speed vb for both situations with and without traffic has to be given (vb = cdir . cseason . vb,0 ) (see EC 4.2, (4.1)). |
|
| Lateral wind (see EC 8.3.2) |
For both situations with and without traffic the following can be defined:
| Setting | Description |
|---|
|
Consider wind
|
(Yes/No) defines whether the particular wind situation shall be considered or not. |
|
Height of attack area
|
Defines the height dtot of the wind attack area Aref,x for for the two situations (dtot = d + d1) (see EC 8.3.1), where d by default is the height of the defined cross-section (note:height of roadway yet not included). In case of wind without traffic d1 is set to the default value of 0.6m (see EC 8.3.1 (4) a)).
In case of wind with traffic d1 is set to the default value of 2.0m (see EC 8.3.1 (5) a)).
|
|
C-factor
|
Wind load factor C (see EC 8.3.2, Table 8.2) |
|
Pd
|
Calculated area load of wind pressure (Pd= 1/2 . ρ × vb 2 × C). |
|
| Vertical component of wind pressure (see EC 8.3.3) |
For both upward and downward wind the following can be defined:
| Setting | Description |
|---|
|
Consider wind
|
(Yes/No) defines whether the particular wind situation shall be considered or not. |
|
Eccentricity
|
Defines the eccentricity e of the application point of the vertical wind force from the center line of the cross-section. By default this value is set to e = b/4 (see EC 8.3.3 (5)), where b is the maximum width of the cross-section as defined in Superstructure>Spans. |
|
C-factor
|
The default wind load factor C for the vertical wind load is considered by 0.9 (see EC 8.3.3 (1). |
|
Pd
|
Calculated area load of wind pressure (Pd= 1/2 . ρ × vb 2 × C). |
Note: For calculating the vertical wind pressure the wind speed without traffic is used.
|
