Hi
With respect to the response spectrum analysis, please would someone clarify how to combine responses for x,y and z directions:
While inputting the spectrum with dyrinp file, do I need to specify the spectrum in 1 direction while setting the spectrum in other two directions as 0.0! Then repeat this for other two directions? Thus while doing this I will be creating 3 dyrinp files for spectra in x,y and z directions (therefore 3 common solution files!)! Subsequently, would I be correct in my approach to use combine module to create 3 load cases to combine responses using SRSS method? This will be achieved using leading response file as primary file ‘P’ while second file as secondary ‘S’ and third file as ‘3’ –repeat this for all 3 directions while changing primary and secondary files as below:
Combined loading 1: x response (P), y response (S), z response (3)
Combined loading 2: y response (P), x response (S), z response (3)
Combined loading 3: z response (P), x response (S), y response (3)
Please advise.