Does wind uplift occur along the long axis?
Does wind uplift occur along the long axis?
(OP)
I rethink this often. When wind hits the facade of a gabled roof building, and flows along the ridge line, parallel to it (the Z direction, lets say), the wind is not really taking a longer route. So, since uplift occurs from the Bernoulli effect, is wind uplift calculated equal to wind in the X direction (perpendicular to the ridge line)?
My gut tells me the uplift force is reduced. How are others calculating uplift in the Z axis, if at all?
Also, when using "equivalent lateral pressure" to calculate the seismic force, is there an uplift component? I'm considering that a seismic ripple has both a horizontal and vertical component.
Thanks for any & all info.
Dairy Designer, California
My gut tells me the uplift force is reduced. How are others calculating uplift in the Z axis, if at all?
Also, when using "equivalent lateral pressure" to calculate the seismic force, is there an uplift component? I'm considering that a seismic ripple has both a horizontal and vertical component.
Thanks for any & all info.
Dairy Designer, California
RE: Does wind uplift occur along the long axis?
RE: Does wind uplift occur along the long axis?
Also, I found in the 97 UBC that the uplift component of the seismic wave is neglected is ASD. For Strength Design, it is calculated, and the equation is in 1630.1.1
I thought I'd include that for anyone searching for that answer.
-Dairy Designer
RE: Does wind uplift occur along the long axis?
They have several other programs that I use regularly.
http://www.archoneng.com/