DYNAMIC ANALYSIS OF STEEL-CONCRETE COMPOSITE FLOORS CONSIDERING THE EFFECT OF THE BIODYNAMIC MODELS

Resumo

The main objective of this research work is to investigate the dynamic structural behaviour
of steel-concrete composite floors when subjected to human rhythmic activities, considering the effect
of the people-structure dynamic interaction, based on the use of biodynamic models representative of
the people. The investigated structural model was based on a real steel-concrete composite floor
spanning 40m by 40m with a total area of 1600m2. The structure represents a typical interior floor of a
commercial building used for gym purposes, and designed according to the usual ULS and SLS
Eurocode provisions. The composite floor is supported by steel columns and is currently submitted to
human aerobic rhythmic loads. The floor is made from composite beams and a 100mm thick concrete
slab and the columns height is equal to 4m. The human comfort evaluation methods used in the
investigation indicated that the steel-concrete composite floor presented excessive vibrations. This
way, the presented results show the relevance of the dynamic analysis when the structural design of
floors is considered, and also the influence of the people-structure dynamic interaction effect on the
assessment of the human comfort of this type of structure.