What is Deflection Amplification Factor (𝑪𝒅) in Seismic Design Codes?

[@varunbaswal7934]

I had seen so many lectures related to seismic engineering, and your way of explanation is the most efficient and effective with crystal clear explanation.....#NO DOUBT

[@doc7798]

fantastic doctor

[@eng.abdulmalekalshehri2257]

I have an question , can I combined between stiffness modifiers and Cd when I check the drift?