Vertical Distribution of Seismic Forces ASCE 7-05
Vertical Distribution of Seismic Forces ASCE 7-05
(OP)
Hello;
I have been trying to find out about the "k" factor in the Cvx formula (12.8-12). The ASCE 7-05 states that it is an exponent related to the structure period. But I still do not know where it comes from, is it a factor that relates to the system's ductility?
Please let me know if you have some info on this. Thank you.
J.L.P.Q
I have been trying to find out about the "k" factor in the Cvx formula (12.8-12). The ASCE 7-05 states that it is an exponent related to the structure period. But I still do not know where it comes from, is it a factor that relates to the system's ductility?
Please let me know if you have some info on this. Thank you.
J.L.P.Q






RE: Vertical Distribution of Seismic Forces ASCE 7-05
With the flexible system, under a particular seismic event, the response of the structure could be visualized more as a whipping motion where lateral forces would be more significant in the higher stories.
So, the k factor accentuates the effect of the height of the structure with larger values of k for longer period structures.
This simply places more of the "applied" forces higher in the structure.
As to where it comes from - I would think it simply is the result of analysis studies or tests. The commentary doesn't even deal with it.