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Dear sebivaq, Thank you so much for opening my eyes ... it was a childish mistake on my part. I considered the DEAD load case as linear static instead of non-linear. Thanx a lot! iotoma

Dear sebivaq, I have set all the parameters for the non-linear analysis and modal analysis exactly as you described but still no difference in the periods of vibration. I'm still looking into it and hopefully come up with a solution. :)

Dear sebivaq, You are right, meaning that I am trying to simulate the damage induced by the earthquake. I never considered geometrical non-linearities in my analysis. I still got the same results for the period of vibration even if I considered nonlinear material behavior. Best wishes, iotoma

Hello again, I am trying to assess the rate of degradation of a RC building subjected to earthquakes and I'd like to do it in terms of fundamental period of vibration (the larger it gets, the lower the stiffness of the structure). I read in the Help that one can run modal analysis after time...

Hi, I have been "playing" lately with this simple 1 story concrete frame structure in order to get the hang of push over analysis. I watched the tutorial and read a few papers on it and I think I'm getting there. So I tried it on my simple frame but I noticed that no matter what value I use for...

Both the Excel and SAP2000 use the same decimal symbol as set in Control Panel / Regional and Language Settings. The problem might be from your SAP2000 input file. If you wrote, for example, 2.5, and in your Control Panel you have "," as decimal separator, SAP2000 understands 25 instead of 2.5...

In the "Analyze" menu select "Set Analysis Options". In the new window you'll see the "Solver Options" button. Click on it and then, on the left hand side tab select "Advanced Solver". Then, from the drop-down menu select the case for which you want the matrices to be saved. After running the...

Hey Lasa88, I have recently encountered a similar problem with yours, modeling the soil in order to find out the stresses, and I did it using solids. I assigned the appropriate material properties to the solids and i was able to see the stress distribution after the analysis. I might add it's a...