Techno Press

Steel and Composite Structures   Volume 13, Number 2, August 2012, pages 139-155
Improving a current method for predicting walking-induced floor vibration
T.H. Nguyen*, E.F. Gad, J.L. Wilson and N. Haritos

Abstract     [Full Text]
    Serviceability rather than strength is the most critical design requirement for vibrationvulnerable floor constructions. Annoying vibrations due to normal walking activity have been observed more frequently on long-span lightweight floor systems in office and commercial retail buildings, raising the need for the development of floor vibration design procedures. This paper highlights some limitations of one of the most commonly used guidelines AISC/CISC DG11, and proposes improvements to this method. Design charts and approximate closed form formulas to estimate the walking response are developed in which various factors relating to the dynamic characteristics of both the floor and the excitation are considered. The accuracy of the proposed formulas and other proposals found in the literature is examined. The proposed modifications would be significant, especially with long-span floors where vibration levels may be underestimated by the current design procedure. The application of the proposed prediction method is illustrated by worked examples that reveal a good agreement with results obtained from finite element analyses and experiments. The presented work would enhance the accuracy and maintain the simplicity and convenience of the design guideline.
Key Words
    composite floors; floor vibrations; serviceability; steady state; resonant; walking force; harmonic.
T.H. Nguyen*, E.F. Gad, J.L. Wilson : Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, VIC 3122, Australia
N. Haritos : Department of Infrastructure Engineering, The University of Melbourne, VIC 3010, Australia

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