Floor systems are to be avoided especially in lightweight steel concrete composite construction a practical limit being 25 30 ft to avoid excessive footfall vibrations.
Floor vibration criteria.
Many criteria have been proposed through the years for human comfort related to vibration of floor systems.
Values for dynamic load param.
A prediction of the floor response and a human tolerance level.
The purpose of this publication is to provide design engineers with a practical yet comprehensive review of the criteria and methods available to prevent floor vibration problems.
They were originally developed as a generic vibration criteria for vibration sensitive equipment for use in the semiconductor medical and biopharmaceutical industries but have found application in a wide variety of technological applications.
For slender floor structures as made in steel or composite construction serviceability criteria govern the design.
Floor systems so designed is unknown at this time.
Because of the complexities involved in human response to vibration and the different.
Guidance is given for.
Acceptance criteria for vibration are specified for human comfort and sensitive equipment.
Modern design and construction.
Vibration criterion vc curves.
To limit induced vibration some facilities use separate.
Are usually impractical for vibration sensitive uses.
The vibration source plays an important role in the overall vibration analysis.
L the design guide should not be applied to specification of tolerable vibration by the introduction of acceptance classes chapter 4 and l buildings prediction of floor response due to human.
The principal sources of vibration in buildings are.
Allen rainer and pernica 1985 and allen 1990 1990a published criteria for the acceptability of vibration of floor systems that are subjected to rhythmic activities such as danc ing and jumping exercises.
Furthermore all criteria must be calibrated and thus are empiri cal in nature the necessary funda mental studies of human response to low frequency very low ampli.
This data is then compared with the equipment manufacturer s specification for the level of vibration that is allowable for that machine.
Spans longer than 35 ft.
4 floor vibration introduction steel structures can meet even the strictest vibration performance criteria in recent years there has been an increase in demand for buildings that are fast to construct have large uninterrupted floor areas and are flexible in their intended final use.
Using these vibration sensors and our analysis equipment we measure the frequencies and amplitudes of the floor vibrations at the site where the equipment will be installed.
Preventing or reducing floor vibration problems.
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