Procedure for vibration evaluation of concrete floor systems

[KhouryA]

For years my firm outsourced the vibration analysis and evaluation of our concrete floor systems.

I recently upgraded to the latest ADAPT Floor pro 2010 that allows me to automatically determine the modal vibration responses, in Hz, of the models we are designing. I am now hoping to evaluate our projects in-house.

Does anyone have experience or a procedure for using the vibration response of a concrete floor system to evaluate it for vibration compliance?

A document I downloaded from ADAPT’s site that gives one procedure is:
Vibration footfall example

I am looking for other ideas or feedback.

Thanks,

 

[JoshPlumSE]

I assume that the main concern is serviceability of the system when subject to typical human activity (foot fall).

For this topic there are really only a few references that I know of:

1) AISC Design Guide 11: Floor Vibrations due to human activity. This one deals primarily with steel floor systems. But, it is probably the most up to date of the references that I know of. Published in 1997. Primary author is Tom Murray from Virginia Tech.

If you look up the AISC structural journal, you'll see a plethora of published articles on the subject from Dr. Murray.

2) September 1991 Steel Tips: Design Practice to Prevent Floor Vibrations by Farzad Naeim. The design procedures in this one are a bit more out of date and have been replaced (for the most part) with the ones from AISC. But, it is still a useful reference

3) The Adapt document is, I believe, based on the Applied Technology Council's Design Guide 1: Minimizing Floor Vibration. My believe is that this is geared more towards concrete construction than steel construction. So, it is probably the place for you to start.

I've never been able to obtain a copy of this document (ATC doesn't have a very good on-line bookstore). While this was published in 1999, my impression is that it is based on the slightly older methods (like that 1991 steel tips) rather than the more widely accepted newer methods (liket he 1997 AISC design guide). However, I cannot say that with certainty as I never actually read it.

 

[steve1]

Here's a lonk to the ATC Design Guide

http://www.atcouncil.org/vmchk/Floor-Vibrations/Minimizing-Floor-Vibration/flypage.tpl.html

 

[PeterDebney]

There are two more design guides that we use for footfall vibration:

1) the Concrete Centre's "A Design Guide for Footfall Induced Vibration of Structures" CCIP-016, published in 2007

2) the Steel Construction Institute's "Design of Floors for Vibration: A New Approach" P354, updated in 2009

The Concrete Centre's guide is actually for all materials while the SCI's guide concentrates on steelwork. Both recommend the finite-element approach over empirical methods for accurate calculations.

 

[avolonnino]

I would highly recommend reading this white paper regarding Vibration analysis.

http://www.oasys-software.com/produ...all_Vibration_and_Finite_Element_Analysis.pdf

I have been using Oasys software for several years. With the software, I have been able to perform vibration studies and footfall vibration/finite element analysis for my clients. Their modular building needs deviate from standard building construction due to the requirement for three dimensional frames, lightweight construction and long spans.