Keywords: steel-concrete composite floors, dynamic structural analysis, finite element modelling, rhythmic human dynamic actions, vibration analysis, human comfort assessment.

In recent years, with the advancement of materials technology and construction methodologies combined with modern architecture, which prioritizes large spans and more slender structures, dynamic analyses have become indispensable due to reports associated with excessive vibration problems. This way, the main objective of this work is to assess the dynamic structural behaviour and human comfort of a steel-concrete composite floor subjected to actions associated to rhythmic human activities (aerobics). The investigated structural model is based on a building floor, with dimensions of 45 m x 32 m and area of 1440 m². The numerical model was developed based on techniques used by the Finite Element Method (FEM) and implemented in the ANSYS software. implemented in ANSYS software. The investigated dynamic load models considered a group of twenty people practicing aerobics on the floor, represented by traditional loading models (only force models). In sequence, the natural frequencies and vibration modes were determined, and after that the dynamic structural response was obtained based on the peak (ap) and RMS accelerations (aw,RMS) and vibration dose values (VDV). The results pointed out there are excessive vibrations and human discomfort when the investigated steel-concrete composite floor is subjected to aerobics, and is only recommended for activities involving walking.

download the full-text of this paper (PDF, 14 pages, 1075 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description