Ground bearing slab vibration
Ground bearing slab vibration
(OP)
Hi everybody!
Just a quick question to see if anyone has came across a similar problem. We are currently working on a research facility where the client has given a set of vibration parameters for the ground bearing slab (very sensitive equipment). I have carried out response factor checks on suspended floors but I don’t even have a clue as to where to start on a ground bearing slab. Can anyone point me in the right direction? I'm not convinced to be honest but inexperience is no excuse for ignorance. Thanks in advance for the time!
Cheers.
Just a quick question to see if anyone has came across a similar problem. We are currently working on a research facility where the client has given a set of vibration parameters for the ground bearing slab (very sensitive equipment). I have carried out response factor checks on suspended floors but I don’t even have a clue as to where to start on a ground bearing slab. Can anyone point me in the right direction? I'm not convinced to be honest but inexperience is no excuse for ignorance. Thanks in advance for the time!
Cheers.






RE: Ground bearing slab vibration
Also, AISC DG-11 (which it sounds like you are familiar with) has a good chapter on vibration sensitive equipment. Obviously, it concerned with elevated steel structures. But, it probably still has some good pointers.
RE: Ground bearing slab vibration
That’s a critical first step. The next one is to get the geotechnical info (spring constants, damping info, etc.).
Once you put those items together, then you can find out what you need. (Since they have given you the performance criteria.)
RE: Ground bearing slab vibration
RE: Ground bearing slab vibration
A vibration survey of the site prior to construction might be in order.
All of this depends on just how sensitive the equipment is. Don't forget that vibrations at different fequencies can travel different distances. Truck traffic is generally a low frequency and travel quite far; HVAC tends to be around 60 hz (and harmonics) and generally gets damped pretty quick by soil.
Mike Lambert