odd structure wind loading help needed
odd structure wind loading help needed
(OP)
I have a two story timber pile supported structure over water the first floor is enclosed only by screening but the second story is fully enclosed. I am trying to develop wind loads for a mwfrs analysis. Does any one have advice on how to treat this structure per asce 7? How will the wind see the underside of the first floor and or second floor behind the screening? Thanks






RE: odd structure wind loading help needed
For practical purposes, on the suction case, quite likely a conservative assumption is to take suction as if it was a roof at the top of the first floor, and -for the suction- as if the screening was solid. For loads directly applied to the screening (overall) you may take the reduced pressures that account for permeability of the screen if there is such, and in any case you need to account for the localized effects as well.
Qualitatively maybe some CFD program may also help with the pressures whilst accounting with permeability of the screens if any, but after looking at it I would stick to more conventional and normative models.
RE: odd structure wind loading help needed
RE: odd structure wind loading help needed
If the screen is designed to withstand wind loads, then figure the open area and see if it meets the wall criteria. If so, design as partially enclosed.
RE: odd structure wind loading help needed
Can you elaborate on how you would incorporate wind through the screen. All the walls are screened full height, if I remember correctly partially enclosed category is pretty limited requiring a large disproportionate opening on walls and otherwise the structure is considered enclosed? How will internal pressures and pressures on the underside of the 2nd floor work out?
The water body is relatively small so I was not planning to consider wave loading. Does anyone have a rule of thumb for small fetch distances where wave loading can be considered negligible?
Thanks again
RE: odd structure wind loading help needed
At the very most, you could eliminate the internal pressure portion of the wind load. This might not change the main wind force resisting system but would help with the component designs of walls/screens/columns/etc.
RE: odd structure wind loading help needed