Revised probability of exceedance for N. America
Revised probability of exceedance for N. America
(OP)
Through a recent conversation with a seismologist, I understand that Codes are moving toward a 2% in 50 years vs. the typical 10% in 50 years we have been using. Canada's NBCC is now implementing this new probability and thus I anticipate much higher loads. Has anyone noticed this recently in the rest of N.America or have any comments.
VOD
VOD





RE: Revised probability of exceedance for N. America
The 2% in 50 years is aimed at the moderate seismic zone with infrequent events. As you know there are some zones that boast very high accelerations but don't occur or haven't occured in recent recorded history. Three examples of this are New Madrid area in the Central US, Seattle, WA and lastly Charleston, SC.
There is very much resistance to this and many agencies are settling on a 1000 yr return period rather than the 2500 yr. period.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Revised probability of exceedance for N. America
RE: Revised probability of exceedance for N. America
Please "what is the new difference":
2%/50yr event? and or 10%/50yr event?