Importance Factor (Ie) & R

[killi_82]

Hi there,

when you are designing basement structure, how much R (response modification factor) did you use (according to ASCE).?

 

[dreber]

The R factor, response modification factor, depends on the material used, as well as the connection detailing.



=========================
David Reber

http://www.kadent-structures.com

 

[dreber]

This is a more complete explanation:

https://www.youtube.com/watch?v=fu5pEc5NJvE

=========================
David Reber

http://www.kadent-structures.com

 

[killi_82]

Thanks all,

what i found in one of the recommendation, it says R=1, however this is his personal suggestion.
it seems that this R=1 is too much...to be designed elastic.

 

[r13]

I think R=1 is justified, as the basement can't achieve the ductility as required for those above ground structures, also for the uncertain nature of the surrounding/confining soil medium.