Comfort Accelerations limits for Tall Building
Comfort Accelerations limits for Tall Building
(OP)
i am starting on the design of a number of tall buildings, ranging in heights from 25-50 storeys and am aware that i need to design the stability systems to ensure that accelerations from wind are kept to allowable limits.
I have a few questions on this:
1/ where can i find some stated limits, preferably from codes, on what acceptable accelerations are and for what return period. I have read and heard people discuss values like 12-15 mg for residential buildings, 18-20 for offices, but i would like to see some solid evidence of these limits
2/ are there any limits on rotational movement, ie when a floor plate twists torsionally on plan from wind.
3/ how can i calculate accelerations, particularly at the concept stages of design, before a wind tunnel test is carried out
many thanks in advance
I have a few questions on this:
1/ where can i find some stated limits, preferably from codes, on what acceptable accelerations are and for what return period. I have read and heard people discuss values like 12-15 mg for residential buildings, 18-20 for offices, but i would like to see some solid evidence of these limits
2/ are there any limits on rotational movement, ie when a floor plate twists torsionally on plan from wind.
3/ how can i calculate accelerations, particularly at the concept stages of design, before a wind tunnel test is carried out
many thanks in advance






RE: Comfort Accelerations limits for Tall Building
See Simiu and Scanlan's "Wind Effects on Structures"
But if you glance at the calculations on Table 9.1.5 you will see that they are quite heinous.