Serviceability Wind Events...Is it 20yr or 25yr
Serviceability Wind Events...Is it 20yr or 25yr
(OP)
Hi guys,
Just a quick one. Our office has recently changed our service wind event from a recurrance interval of 20yrs (BCA) to 25yrs (Loading Codes).
This has increased my drift calculations by over 10%!!!
Which is the correct wind event to use and what wind event are others using out there.
Just a quick one. Our office has recently changed our service wind event from a recurrance interval of 20yrs (BCA) to 25yrs (Loading Codes).
This has increased my drift calculations by over 10%!!!
Which is the correct wind event to use and what wind event are others using out there.





RE: Serviceability Wind Events...Is it 20yr or 25yr
RE: Serviceability Wind Events...Is it 20yr or 25yr
RE: Serviceability Wind Events...Is it 20yr or 25yr
Note that this remains (as it was before) in the 'guidelines for servicabilty limit states'. This leaves plenty of wriggle room under 'engineering judgement'.
Cheers
RE: Serviceability Wind Events...Is it 20yr or 25yr
Do you mean TABLE 3.3 ANNUAL PROBABILITY OF EXCEEDANCE?
All of Section 3 applies only to New Zealand, so that doesn't apply to Australian designs.
SECTION 3 ANNUAL PROBABILITY OF EXCEEDANCE
(FOR STRUCTURES IN NEW ZEALAND ONLY)
RE: Serviceability Wind Events...Is it 20yr or 25yr
Cheers
RE: Serviceability Wind Events...Is it 20yr or 25yr
That's why Table 3.1 'Regional Wind Speeds' added the V25 row.
RE: Serviceability Wind Events...Is it 20yr or 25yr
That is the table that I was referring to (see attached).
The BCA also has a similar table which I always thought would override any SAI standard, seeing that standards are only deemed-to-have-satisfied documents referenced in the BCA.
I went to an Eng's Australia seminar at the Queensland branch a few weeks ago about designing for Earthquakes to AS1170.4:2007, presented by Prof Wilson from Swinburne Uni, and going by the presentation, I got the impression that annual probability of exceedance periods should be taken from the BCA.
RE: Serviceability Wind Events...Is it 20yr or 25yr
RE: Serviceability Wind Events...Is it 20yr or 25yr
your right, the table doen't deal with serviceability, I guess I should have looked at the table before I posted it.