Murray Criterion for Walking Vibrations

Summary of the Criterion
In the criterion presented by Murray, an acceptable steel floor system is predicted, with respect to vibration levels due to walking excitation, if the dynamic criterion below is met. This criterion is applicable to offices and residences with fundamental natural frequencies below 10 Hz.
Murray criterion:
D = 35A0 Æ’ + 2.5 0
where D  damping in floor system, expressed as a percent of critical
A0  maximum initial amplitude of the floor system due to a heel-drop excitation, in
Æ’  first natural frequency of the floor system, Hz
This criterion is only applicable for the units specified. The reader is cautioned against using other units.

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