NBC 2010 (CBN 2010) Wind loads family

 

The NBC 2010 (CBN 2010) Wind loads family is created when the Canadian climatic standard NBC 2010 (CBN 2010) is selected for the current project.

CBN 2010 Wind loads family - Properties

Family

• Name: the default name of the family.

• No.: displays the ID number of the family.

Automatic generation

Allows enabling / disabling the automatic wind generation components (i.e., loading areas exposure, pressure coefficient, split loading areas, loads generation)

Wind direction: Select the wind direction (WindX+, WindX-,WindY+, WindY-)

• Wind definition: Lets the user define the wind properties differently per wind direction.

- per direction:: The user can define parameters for each wind direction.

- all directions: The fields are defined the same for all directions.

• Current wind direction: This represents the direction for which the user defines or views parameters.

Dynamic base pressure

• Region: defines the wind region. The button displays the available locations and allows the selection of the corresponding region.

Regions for CBN 2010 wind loads family

 

• The Pressure coefficient is automatically calculated according to the selected region. You can click in the Pressure value field and enter a custom value.

• Ce calculation mode: select the desired calculation mode; select manual to enter a manual value for the Ce factor.

• Ce: the exposure factor.

• Cgi: the internal gust effect factor.

• Cg: the gust effect factor.

• Height above terrain: the building's height above the terrain.

Combinations

Define properties that are taken into account when generating concomitance combinations. See Configuring load cases combinations.

• Group loads: when enabled, each load case inherits "combinations" properties from the corresponding load case family and will be grouped as a generic load case in the concomitance matrix.

• Effect: sets the load case as "Leading", "Accompanying" or both.

• Coefficient y EQU: partial factor for wind action considered in the EQU ultimate limit state.

• Coefficient y STR/GEO: partial factor for wind action considered in the STR/GEO ultimate limit state.

• Ψ0 coefficient: factor that defines the combination value of a variable action.

• Ψ1 coefficient: factor that defines the frequent value of a variable action.

• Ψ2 coefficient: factor that defines the quasi-permanent value of a variable action.

Color

• View / change the representative color for the family.

Tip

Click a section of the properties window. Notice the bottom area of the window; it displays a short description of the active cell's content.

Accessing the properties

After creating a wind load case family: in the Project Browser, expand the Loading group and select Wind NBC 2010 (CBN 2010).