| Calculate Wind Height Factor (mu_z) |
The following parameters are input used calculate the height variation factor for the wind pressure, μz:
| Setting | Description |
|---|
| Building Height (H) |
This is the total height (H) of the current building.
|
| Bottom Elevation |
This is the elevation of the bottom of the current
calculation part of the current building. |
| Height (z) & Wind Intensity Curve |
Select the method to sub-divide the height above ground into
discreet points of the wind intensity curve:
- Segment Count to Divide Height (H) Equally
- This is the segment count to divide equally the total height
(H) of the current building. This is used to calculate the
individual height (z) where the wind pressure needs to be
calculated.
- Equal Segment Length Along Height (H)
- This is the segment length, and the length is equal. The
length is along the total height (H) of the current building.
This is used to calculate the individual height (z) where the
wind pressure needs to be calculated.
- Provide Special Height (z)
- This is the special height (z) list. This is the individual
height (z) where the wind pressure needs to be calculated. The
delimiter for the individual height (z) can be comma (,) or
space, such as 3,6,9.
|
| Roughness Type |
This is the roughness type. The value can be A, B, C or D.
|
| Modification Factor |
This is the modification factor. This is to modify the height
variation factor for the wind pressure. |
|
| Calculate Wind Shape Factor (mu_s) |
The following parameters are input used to calculate the wind shape factor,
μs:
| Setting | Description |
|---|
| Shape Item ID |
The list of the shape item ID and the shape item
name, these shape items are from Chinese load code
GB 50009.
Note: Only the shape item 30 (Closed Polygon Building) is
supported now. More shape items will be supported in the
future.
|
| Secondary Shape Type |
The secondary shape types of the shape item 30
(Closed Polygon Building) are shown as the
following:
- Rectangle
- L Shape
- C Shape
|
| Set Shape Factor … |
This is used to set the shape factor of the
structure. STAAD.Pro will set the default values of
the shape factor of the current secondary shape type
of the current shape item from the config database
on the Set Shape Factor dialog. You can modify the
shape factor.
Positive value is for the windward face.
Negative value is for the leeward face.
Every face name is shown in the first row, every
direction of wind from is shown in the first column,
on the Set Shape Factor dialog.
|
| Interference Factor from Other Building |
This is the mutual interference factor from other
building. |
|
| Calculate Reference Wind Pressure (w0) |
The following parameters are used to calculate the reference wind pressure, w0:
| Setting | Description |
|---|
| Reference Wind Pressure (w0) |
This is the reference wind pressure (w0). |
| Modification Factor |
This is the modification factor. This is to modify the reference wind pressure (w0). |
|
| Calculate Along-wind Vibration Factor (beta_z) |
The following parameters are input used to calculate the wind-induced
vibration factor, βz:
| Setting | Description |
|---|
| Consider Along-wind Vibration Factor |
Consider the wind-induced vibration factor,
βz, along-wind
or not. |
| Damping Ratio |
This is the damping ratio of the current building. It
should be greater than 0. |
| Basic Natural Vibration Period (T1) |
This is the basic natural vibration period (T1) of
the current building. |
| Structure Type |
Select either:
- High-rise Building -
The structure type of the current building is high-rise
building. The high-rise building is the modern building
which is very tall and has many levels or floors. The
width of the windward face of the high-rise building is
larger than that of the high-tower structure.
-
High-tower Structure - The
structure type of the current structure is high-tower
structure. The width of the windward face of the
high-tower structure is far less than its height, and is
also less than that of the high-rise building.
|
| Provide Width of Windward Face … |
This is used to provide the width of the windward
face of the current structure.
Wind From: This is the direction of the wind from.
Width: This is the
width of the windward face of the current structure. This is
just for the high-rise building. Tip: It is
recommended to use the top width of the windward face is
equal to the bottom width for the high-rise building.
Bottom: This is the
bottom width of the windward face of the current structure.
This is just for the high-tower structure.
Top: This is the top width of the windward face of
the current structure. This is just for the
high-tower structure.
|
|
