I have an Autopipe model I would like to carry out Earthquake and Dynamic analysis with SAMs.
I have applied the static Earthquake case as shown below as an initial check.
I have also applied the response spectrum,(see below) adding support groups with corresponding imposed displacements (see R1, SAM case 1 example)
Response spectrum analysis window
Case 1 definition window
Do the R1, R2… results, automatically combine the response spectrum analysis with the imposed displacements applied in S1,S2…?
Or do I still need to create a user define load combination to capture the response spectrum and the corresponding imposed displacements?
If so please could you elaborate on the combination I need to implement, providing an example for R1S1?
Thank you for your help.
The Response Spectrum analysis results (R1, R2, etc.) do not automatically include the results from the SAM imposed displacements being applied.
When selecting the SAM case(s) in the Response Spectrum case definition, you are opening up inputs for assigning different spectra to different parts of the model. In this example, I am including 4 support groups under SAM case S1 with Response Spectra case R1.
This allows me to assign different Spectra to the 4 different support groups, rather than one single spectrum in each direction to the entire model.
The results, however, from the imposed displacements are not automatically included. You would need to create additional combinations that include R1 and S1, R2 and S2, etc.
There is an example in the Response Spectra Analysis training course, which can be found here: https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/58993/advanced-modeling-and-analysis-using-autopipe
I hope this helps,