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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Vibration Analysis and Fatigue Assessment of Floors. Part I: Human Rhythmic Activities
Ana C. S. da Silva1, Elisângela A. R. Santos1, Leandro A. Deus1, Mayara M. Martins1 and José G. S. da Silva1,2
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DOI:10.17265/1934-7359/2021.10.001
1. State University of Rio de Janeiro (UERJ), Rio de Janeiro/RJ 20550-900, Brazil
2. Structural Engineering Department (ESTR), State University of Rio de Janeiro (UERJ), Rio de Janeiro/RJ 20550-900, Brazil
Structural problems associated with excessive vibration of building floor systems when subjected to human rhythmic activities have been frequent. In this context, this research work aims to develop an analysis methodology to evaluate the human comfort and assess the fatigue performance of steel-concrete composite floors when subjected to human rhythmic activities (aerobics). The investigated structural model corresponds to a steel-concrete floor with dimensions of 10 m × 10 m and a total area of 100 m2. The numerical model developed for the dynamic analysis of the floor adopted the usual mesh refinement techniques present in finite element method (FEM) simulations implemented in the ANSYS program. The investigated floor dynamic response was calculated through the consideration of people practicing rhythmic activities on the structure, in order to verify the occurrence of excessive vibration and to assess the human comfort. The fatigue assessment is based on a linear cumulative damage rule through the use of the Rainflow-counting algorithm and S-N curves from traditional design codes. The results indicated that, in several analysed situations, the investigated floor presents excessive vibration and user’s discomfort. On the other hand, the structure service life values were higher than those proposed by the design codes, ensuring that the members, connections and joints will not fail by fatigue cracking.
Steel-concrete composite floors, human rhythmic activities, vibration analysis, human comfort, fatigue assessment.
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