Assessment of floor vibration using the OS-RMS90 method
conference paper
To achieve flexibility with regard to space-arrangement and occupancy, multi-storey buildings require large span floor structures with a minimum of internal columns and walls. Modern materials and methods of construction are becoming more and more suitable to fulfill these requirements. It is common for the design of slender floor structures to be determined not only by the ultimate limit states but by serviceability criteria such as deflections and vibrations. This paper describes a procedure for the determination and assessment of floor response due to walking. Comfort criteria for vibrations are defined in relation to the use of the floor. The procedure is based on the calculation of the one-step root mean square (OS-RMS) value of the response of a floor which is brought into vibration due to a person walking on that floor. It is obtained from the combination of measured or simulated floor mobility functions and a standard walking load function. In order to take into account the possible statistical variation in the loading, the 90 percentile of OS-RMS values obtained for different persons' weights and walking speeds is determined. It is possible to carry out the design check in a simplified manner using design charts from which the OS-RMS90 value can be read off directly assuming the floor under investigation can be schematized as a single degree of freedom. In this case it is sufficient to determine the basic dynamic characteristics of the floor in terms of damping, first natural frequency and modal mass. The simplified method enables the designer to assess quickly whether a floor design will be susceptible to walking loads.
Topics
TNO Identifier
534066
ISBN
9789076019314
Publisher
University of Southampton, Institute of Sound Vibration and Research
Source title
Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011, Leuven, Belgium, 4-5 July 2011
Editor(s)
Lombaert, G.
Muller, G.
Roeck, G. de
Degrande, G.
Muller, G.
Roeck, G. de
Degrande, G.
Collation
5 p.
Place of publication
Southampton, UK
Pages
1072-1076
Files
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