Approximate Method for Estimating Maximum Cross Wind Induced Hight Rise Acceleration

[KootK]

I know, that's a pretty big ask in the space that is "rule of thumb". Still, I'd think that there'd be some way to roughly follow this path:

1) Concrete / steel tower this tall, this wide, and exposed to such and such maximum wind speed.

2) Rough estimate of building period.

3) Rough estimate of max wind induced building acceleration.

Anybody got anything? Any RWDI employees lurking about?

 

[phamENG]

Check out this paper, page 22: Wind Loads on High-Rise Buildings by Using Five Major International Wind Codes and Standards

Not exactly a rule of thumb, but could help you set up something. Sounds like Australia has it written into their codes, so maybe some of our Australian friends have something up their sleeves.

 

[tmac7285]

phamEng is right, the AS1170.2 has a codified way to estimate the cross wind response for given building ratios (height, width and length). It's not super quick to calculate, but is really useful at a prelim stage.
My experience is that the code is pretty conservative with its estimations; the wind tunnel tests routinely come back with 70-80% along-wind response and even less for cross-wind.
It of course is particular to the specific problem.

 

[bones206]

Robot has a CFD wind simulation module that might be useful for something like that.

 

[Retrograde]

Extract from the Aus wind code: