Hello, I am performing response spectrum analysis in three directions on a large model in STAAD (v8i version 20.07.11.50) using the "generic" method as discussed in Section 5.32.10.1.1 of the Help file. As in the example given in that section, we have repeated all selfweight, joint, and member loads due to dead load and 25% of live load within the first spectrum load case, and in each of three directions (X, Y, and Z). I would like to know if we can define the dead and live loads as reference loads using this method, so as to avoid needing to reenter all the loads. If so, is it necessary to define the reference loads as "MASS" type? If they are defined as "MASS", does STAAD automatically consider the loads entered as masses in all three directions? Also, if the "MASS" reference load type is used, does that prevent use of that reference load for the corresponding static analysis load case? Would it be better to use the DEAD or LIVE loading types? If so, how do we apply all the Y-direction loads as masses in the other directions? Thank you very much for your assistance. Please note that I cannot upload my analysis model for security reasons.
↧
