Wind Load
You can enter up to four (4) wind load profiles namely Wind 1, Wind 2, Wind 3 and Wind 4.
For piping code = NONE, the Specified Displacement results for Wind load are “Algebraically” added to the results from all other load cases.
Load Combinations
With 10 thermal, 3 seismic, four wind and other loads, you can analyze a total of up to 103 load combinations (including 55 thermal ranges).
You can apply a wind load to the whole or parts of the model. CAEPIPE applies it as a lumped (concentrated force) load at the nodes (i.e., it is not a distributed load along the element). A wind profile is required for the region in which the system is installed.
The dialog for specifying wind load is given below.
When Wind Code is NOT selected then the following wind load related fields are to be specified.
Shape factor
Input a shape factor value here. CAEPIPE uses a constant value for shape factor. For example, ANSI A58.1-1982, “Minimum Design loads for Buildings and other Structures” provides a shape factor of 0.6 for circular cross-section.
When user selects Pressure versus Elevation, CAEPIPE does not use the shape factor.
Direction
Input the direction of the wind using the direction cosines (examples: for wind in Z direction, Z comp = 1; for wind in 45° X-Y plane, X comp=1, Y comp=1, Z comp=0). See section on Direction in the Technical Reference Manual.
Wind or Pressure Profile
You need to input values for wind velocity or pressure at different elevations. See Subsection titled “Wind Load” in the CAEPIPE Technical Reference Manual for details on how to compute Wind Forces as per ANSI A58.1-1982.
CAEPIPE computes the wind load on an element by interpolating the wind forces between the elevations.
Units
You can specify any combination of units for elevation, pressure and velocity.
To exclude an element(s) from wind loading, the Load definition dialog for that element(s) should not have Wind load checked. In the dialog below, Wind load is checked.
ASCE/SEI 7-16
Starting Version 10.30, CAEPIPE has the built-in feature to compute the Design Wind Forces as per ASCE/SEI 7-16, when this code is selected. For using this feature, basic wind parameters are required to be defined for the stress system. Selecting this code without defining the basic wind parameters listed above will show a popup as shown below.
Refer to Section titled “Wind Load” in CAEPIPE Technical Reference Manual for details on implementation of ASCE/SEI 7-16 in CAEPIPE starting Version 10.30.
EN1991-1-4 (2010)
Starting Version 10.30, CAEPIPE has the built-in feature to compute the Design Wind Forces as per EN 1991-1-4 (2010), when this code is selected. For using this feature, basic wind parameters are required to be defined for the stress system. Selecting this code without defining the basic wind parameters listed above will show a popup as shown below.
Refer to Section titled “Wind Load” in CAEPIPE Technical Reference Manual for details on implementation of EN 1991-1-4 (2010) in CAEPIPE starting version 10.30
