canadiancastor
Structural
- Apr 13, 2014
- 39
Following up on this thread: It's my understanding that 4.1.8.11.3) d) v) allows us to use a larger period specifically to check seismic deflections. This means I'll have a different base shear than my regular elastic analysis, so I always run a distinct case anyways. I'm wondering whether or not it's conservative to simply ignore I_E / (R_d * R_o) while calculating base shear for this "deflection" case, instead of having to multiply the deflections by that amount (per 4.1.8.13. 2)). The way I see it, it's always going to be worse to multiply the base shear by a factor than deflections, since P-delta effects will tend to amplify deflections more when the loads are multiplied. Am I missing something here?
