Hi All,
Please correct me if I am wrong, I have a question regarding to the response spectrum reaction results on the shear walls it showing only a positive value and that's because that the RS(response spectrum) quantity will produce only positive value, and if you want to be able to see all the positive and the negative value.
you need to see each mode separate before combining all the modes
which can be done using the combination sign by set the mode to the number of mode which has the highest current mass participation factor in each direction
please check the following link : https://knowledge.autodesk.com/support/robot-structural-analysis-professional/learn-explore/caas/sfd...
I have 2 questions here :
1- In the link above if we set the main mode 0 thats mean the program will combine all the modes using the combination method, but if you set the mode to a certain number then the commination it will not happened cuz there is only 1 mode ? is my understanding right ?
2-How we can check the torsion irregularity by using the response spectrum analysis?
Solved! Go to Solution.
Solved by EduardoMeruvia. Go to Solution.
To answer your questions,
Thanks, The problem I am facing iny model, one of the core walls reaction results are showing like this ..
Half ot it positive and the other half negative
That is because you have multiple load cases or combination cases selected i.e. its showing you the MAX and MIN envelops. If you select a single load case or combination case, it should show only a single value.
Can you upload your model?
If not, do you get the same for ALL other seismic cases? Including the simple seismic base directions i.e. Ex, Ey or Ez separately.
there is nothing wrong in your screenshot if it's under sismic X
M. Agayr
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