STAAD.Pro Physical Modeler Help

Create: Wind Load Definition dialog

This dialog is used to add either code-prescribed parameters for wind loads or a wind intensity profile.

Opens when the Wind tool in the Create Load Definitions group is selected on the Catalog ribbon tab.

Wind tab

SettingDescription
Name Type a descriptive name for the wind load definition.
Code Select the code for entering wind data:
  • Custom – used to enter data pairs of wind pressure at given heights
  • SP 20.13330 2016 – used to enter wind load parameters for both static and dynamic wind loads per the SP 20.13330 2016 code
Properties Used to enter code parameters for a wind definition.
SettingDescription
Pressure the characteristic value of wind pressure, always positive
Terrain
terrain roughness category:
  1. Coastal Zone.
  2. Urban Zone.
  3. Large City.
Classification
the type of structure:
  1. Prismatic building structures,
  2. General-type concrete structures,
  3. General-type framed steel structures.
Region Wind region as per clause 11.5 of SNiP 2.01.07-85* 2016. This is used to determine the wind pressure in determine the dynamic wind component.
Delta
logarithmic decrement of oscillations, Delta (see table 11.5 - Section 11.1.8 for the definition). Typically values are:
  • 0.15 for steel towers, masts, lined chimneys, column means including the ones on the reinforced concrete pedestals
  • 0.3 for reinforced concrete and stone structures as well as for buildings with steel framework if there are walling structures
Select Configuration
The building configuration as defined in SNiP 2.01.07–85 "Loads and Actions":
  • 0. Prismatic building structure - Rectangular building- Outstanding architectural details on the left façade.
  • 1. Prismatic building structure - Rectangular building- Both side façades are smooth
  • 2. Prismatic building structure - Rectangular building- Outstanding architectural details on the right façade
  • 3. Prismatic building structure - Rectangular building- Outstanding architectural details on both side façades
  • 4. Prismatic building structure - Rectangular building- Triangular building
  • 5. Prismatic building structure - Rectangular building- Rhombic building
  • 6. Prismatic building structure - Rectangular building- Number of vertices of polygonal building, not more than 12
  • 7. Prismatic building structure - Less than 3 — rectangular building
  • 8. Prismatic building structure - 3 — triangular
  • 9. Prismatic building structure - 4 — rhombic
  • 10. Prismatic building structure - More than 4 — polygonal
  • 11. Framed RC structure
  • 12. Lattice steel structure
Intensity Vs Height (For Custom wind defintions) Click in the field to open the Height vs. Pressure data table. Enter pairs of data for wind pressure at a given height (in the current units).

Int cells – wind intensities (pressures) in force/area. Up to 100 different intensities can be defined in the input file per type.

Height cells – corresponding heights in global vertical direction, measured in terms of actual Y (or Z for Z UP ) coordinates up to which the corresponding intensities occur.

Exposure tab

Used to

SettingDescription
Exposure Used to enter exposure factors. A value of 1.0 means that the wind force may be applied on the full influence area associated with the joint(s) if they are also exposed to the wind load direction. Limit: 99 factors.
Note: Note any joint does not have an exposure assigned, the exposure will be taken as 1.0.