Is it possible to alter which material is assigned to a set of members after using the CHANGE command?
I'm attempting to do an expected strength analysis per AISC 341-10 section F2.3 by altering the material properties for vertical braces. I was able to run an expected strength analysis on a small test model by altering the vertical brace material properties (E = Es/10000, alpha = alpha_s*10000) and assigning temperature loads to the braces to produce equivalent expected strength loads in the braces. These loads then transferred to the rest of the structure and produced the same results as my hand calculations.
Now I'd like to apply this analysis methodology to a larger model with other loads cases. Is it possible to first run an analysis of dead, live, seismic etc. and then run an analysis as I described above with the material properties for the vertical braces modified (E = Es/10000, alpha = alpha_s*10000), all within the same model?
Thanks
Mike Moses