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The Load> Wind command enables the user to define static wind load cases (W1 - W10) by generating wind pressure:
Vs. Profile piping height profiles
Per ASCE 7 1998, 2002, or 2010 code
Per Uniform Building Code (UBC) requirements.
After specifying a new wind load case, select the first cell in the left column to highlight the row and press the Modify button to see more settings for the specified Wind Load Type as indicated below:
The wind force is applied as uniform loads in the local coordinate system of the straight pipe or bend element. The equivalent wind force is assumed to act through the centroid of the element.
Wind loads will only be applied to piping segments that have "Applied Wind" checked on, and the load case checked On inside of the analysis set:
Segment Tab on the input grids:
Load> Static Analysis Sets> modify analysis set:
Beam members are not subjected to wind loads, enhancement has been logged, CAE-CR-8199.
In order to exclude piping inside a building from wind loads, the piping inside should be entered as a separate segment(s) from the piping outside the building. With the model Input grid opened select the Segment Tab, see column labeled "Apply Wind", Applies wind load cases to the segment corresponding with the selected row. Enable (check ON) / Disable (check OFF) check boxes a required for segments listed in the model.
When specifying elevations wind load profile remember to check that ground is correctly defined on the main Wind screen. This applies also to wind loadings per ASCE-7 and UBC. Opening older models a warning message "negative elevations found" may indicate an incorrect wind loading across this model.
If the Ground elevation for wind is entered with a value greater than the vertical coordinates of the model (i.e. the whole model is below ground) it will result in zero forces.
The following only affects AutoPIPE V8i 09.06.00.15 and will be fixed in the next new version 09.06.01.xx and higher: The Ground Elevation for Wind is always entered in Feet, regardless of the model units file specified on Tools> Model Options> General dialog . This can be confirmed with the Loads Summary Data Listing report using any metric units file (CAE-TR-11097).
Loads and Load Sets - AutoPIPE
Bentley AutoPIPE