allowable high rise building drift

[swelm]

hello

i want to ask about the allowable high rise building drift

if (steel or concrete building)

all of us know the allowable story drift shown in table 12.12-1 (ASCE7-05),but i ask about the drift for the whole building

for example building with height 150 meter

what is the allowable building drift?

we use ACI and UBC

I WISH TO find aswer with refrence in code

many thanks

 

[NewImhotep]

Building drift should be as the story drift in seismic.

usually story drift is more critical, if the building pass in it , will pass also in building drift

the case is the same for wind loads.

 

[BigH]

heard that the empire state building sways about 18 inches = but no references for substantiation

 

[faromic]

That's crazy....The Empire State building is a steel frame encased in concrete. This concrete encasement increases the stiffness by almost 4 times. I would love to see some proof of that.

 

[Lion06]

I would believe that the Empire State Building could sway that much (under high wind loads). It has FMC for the lateral system (with masonry infill - even though the masonry wasn't designed as part of the lateral system, I am sure it is taking some of the lateral loading and, as a result, reducing drift somewhat) and H/500 drift on a 500' tall building is 12".
Not surprising at all.

 

[lkjh345]

I also can easily believe 18" sway on the Empire State Building.

18" over a height of 1250' is H/833. Very stiff. Or, looked at another way that is a average story-to-story drift of only 1/8" per floor. Much, much better than a lot of modern buildings.