Comments, Questions, and Answers about dynamic support forces in AutoPIPE

Items #1

Question: AutoPIPE: Dynamic Results Interpretation

A. My question is how come the code compliance section does not include both the positive and negative dynamic
results (ie GRTP# +/- R#)? Is there a way to do that?

OR

B. Also, I am confused about how to interpret the local and global forces for the combinations which contain the dynamic support load. Why are the local forces for the dynamic load given as +ve?

TR Number: None
Product: AutoPIPE
Version: n/a
Area: General
Problem ID#: 74535

Keywords:
R1 - R50 Response spectrum cases 1 to 50
H1 - H10 Harmonic cases 1 to 10
M1 - M50 Time history cases 1 to 50
F1 - F10 Force spectrum cases 1 to 10
S1 - S10 Seismic Anchor Movement cases 1 to 10 

Answer:  All dynamic results in AutoPIPE are positive. Since it is the maximum absolute value of the oscillating response.

By reviewing All AutoPIPE dynamic results for the following are reported as positive numbers:

...R1 - R50 Response spectrum cases 1 to 50
...H1 - H10 Harmonic cases 1 to 10
...M1 - M50 Time history cases 1 to 50
...F1 - F10  Force spectrum cases 1 to 10
...S1 - S10 Seismic Anchor Movement cases 1 to 10

For more details on this subject please see the following AutoPIPE help section:

A. Help > Contents> Contents Tab> Reference Information> Results Interpretation> Select the "Results Interpretation Overview" link, at the bottom of the listing select "Dynamic Support Forces" link, read the entire
section for complete details and workaround.

B. Help > Contents> Contents Tab> Reference Information> Analysis Considerations> Modal Analysis> Modal Analysis.

Item #2

See Also

Bentley AutoPIPE

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

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