Title:
Wavelength Content of Concrete Floors and its Significance for Moving Vehicles
Author(s):
D. A. Gasparini, M. Petrou, and M. E. Ozer
Publication:
Structural Journal
Volume:
87
Issue:
6
Appears on pages(s):
706-715
Keywords:
concrete slabs; dynamic response; floors; surface roughness; Fourier transformation; moving loads; tolerances (mechanics); Structural Research
DOI:
10.14359/2991
Date:
11/1/1990
Abstract:
Discrete Fourier Transforms (DFTs) of actual concrete floor elevation data are presented. The DFT shows the wavelength content of a floor profile. The transfer function of a flexible vehicle moving with a constant velocity is given. The transfer function indicates that long wavelengths and wavelengths equal to the vehicle wheelbase divided by an integer do not cause horizontal accelerations of the vehicle mast. The wavelength that induces resonance is equal to the vehicle velocity divided by the natural frequency of the vehicle mast. Horizontal acceleration responses of vehicles moving over actual floor profiles are computed. The issue of specifying floor roughness tolerances to control vehicular response is discussed.