Wind load on an irregular building (picture attached)
Wind load on an irregular building (picture attached)
(OP)
Hi all!
I could really use your help with this one.
I have a building (see attachment) with an irregular shape to it (both in height and floor plans.) I am designing as per the National Building Code (Canadian) and have not the slightest clue as to how approach this building when it comes to wind.
I am going to tell you how what I think the approach should be but would REALLY appreciate guidance on this matter.
When the wind travels in the direction "C", the building is a "high-rise building as per NBC" and should approach it in that manner. When the wind approaches in the direction "A", it is a low-rise building as per NBC" NOTE: the building is not cantilevered at this location, it is on grade as well.
Am I correct so far?
How about when the wind is coming from "D"? The lower roof is a "low-rise building" and the side of the building to the left of it as well, but not the building face directly above the lower roof.
Ugh so confusing! ;(
I could really use your help with this one.
I have a building (see attachment) with an irregular shape to it (both in height and floor plans.) I am designing as per the National Building Code (Canadian) and have not the slightest clue as to how approach this building when it comes to wind.
I am going to tell you how what I think the approach should be but would REALLY appreciate guidance on this matter.
When the wind travels in the direction "C", the building is a "high-rise building as per NBC" and should approach it in that manner. When the wind approaches in the direction "A", it is a low-rise building as per NBC" NOTE: the building is not cantilevered at this location, it is on grade as well.
Am I correct so far?
How about when the wind is coming from "D"? The lower roof is a "low-rise building" and the side of the building to the left of it as well, but not the building face directly above the lower roof.
Ugh so confusing! ;(






RE: Wind load on an irregular building (picture attached)
If the code classifies this building as a highrise, how does that differ your analysis and design? Are you required to take into account dynamic effects or are the pressure co-efficients altered? If the building is a highrise, I would be inclined to send it away for wind tunnel testing.
As for wind in directions B and D, I would calculate the wind pressure, the elavation area, distrubte the force to the floor diaphrams accordingly and ensure the lateral system has the capacity to transfer this to the foundations.
I would also be mindful that the embankment may add some additional topographic effects if the hill is large enough.
RE: Wind load on an irregular building (picture attached)
RE: Wind load on an irregular building (picture attached)
RE: Wind load on an irregular building (picture attached)
At first I thought this as well but according to Clansman's oringinal post, this building is not a cantilever.
RE: Wind load on an irregular building (picture attached)
Directions B and D would then be basically the same, take the worst of the 2 and apply it in both directions.
B is much worse than A, so ignore A and just take the wind load from B in both directions. This assumes that there are no major earth retaining forces, if there are then direction A may then be critical.
RE: Wind load on an irregular building (picture attached)
csd72,
Bearing in mind that under that cantilever is grade, wouldn't the "Cantilevered" portion in direction B and D act as a low-rise whereas the non-cantilevered portion act as a "high rise" if I were to assume they are independent structures?
Thanks again!
RE: Wind load on an irregular building (picture attached)
RE: Wind load on an irregular building (picture attached)
Thanks again to everyone.
*starts issuing stars*