Nowadays, modern structures have made good use of new technology adopting high-strength and lightweight materials in building construction. This trend together with increasing needs for open and large column-free spaces may create excessive floor vibration, especially if the structures are subjected to rhythmic activities (e.g. sports events) or other vibrating sources. Excessive vibration causes serviceability problem such as nuisance and discomfort to the users. This paper will present a project in Tin Shui Wai, Hong Kong, which consists of an indoor swimming pool of plan size 25m×25m at G/F, a multi-purpose hall of plan size 25m×25m at 2/F and an indoor recreation centre with an arena of plan size 44m×42m at 3/F. Coupling with this lightweight steel column-free structural arrangement, there will be rhythmic activities at both the multi-purpose hall and the indoor recreation centre. This paper will therefore describe how the human-induced floor vibration problem by rhythmic activities on the project was addressed and solved in the structural design. This paper will therefore review available literatures on the acceptable criteria for floor vibrations subjected to rhythmic activities, and the methods to calculate the natural frequency and the peak acceleration of a structure. In-situ measurements will also be carried out by the City University of Hong Kong on the natural frequency and the peak acceleration of the completed structure, and this paper will discuss the various types of in-situ measurements that can be carried out, and will evaluate the advantages and limitations of these in-situ measurements.
Li, W. W., Wong, C. T., Leung, M. K., & Fung, S. C. (2011). Floor vibration due to human rhythmic activities: Tin Shui Wai public library cum indoor recreation centre. In Procedia Engineering (Vol. 14, pp. 3285–3292). https://doi.org/10.1016/j.proeng.2011.07.415