| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Environment: | N/A |
| Area: | Results |
| Original Author: | Bentley Technical Support Group |
| Date Logged & Current Version | March. 2017 11.00.00.22 |
Problem:
Why results for following load-cases are always +ve :
-
Response Spectrum Analysis
-
Harmonic Analysis
-
Force Spectrum analysis
-
Time History Analysis
how to get -ve (Negative) results?
Solution:
In short, in order to run a Dynamic Analysis one must first obtain the result from a Model Analysis. Note that calculated values from modal analysis are all +ve. Therefore the results for all dynamic analysis are +ve.
See AutoPIPE help
Help > Contents> Contents Tab> Reference Information> Results Interpretation> Dynamic Support Forces Results
Note: be sure to read the entire help page for clear understanding.
After reading the help reference above, to include a -ve (negative) dynamic load case (ex. SAM), create a user combination and set the scale factor to -1.00, as shown below.
Create additional User Code / Non Code combinations as needed to consider the -ve direction of dynamic load cases.