Modelagem do comportamento estrutural dinâmico e avaliação dos critérios de projeto para conforto humano de edifícios submetidos a ações humanas rítmicas sobre os pisos

Abstract

This research work aims to assess the floors dynamic structural behaviour and human comfort evaluation of the floors of a twenty stories steel-concrete composite building when subjected to human rhythmic activities. This type of evaluation is required due to excessive vibrations resulting from the design of slender structural systems, implying in lower damping levels and natural frequencies, such that the excitations frequencies range associated with human rhythmic activities can cause resonance. The investigated structural model is composed by a twenty stories steel-concrete composite building, in which three floors were chosen to be subjected to human rhythmic activities. The proposed analysis methodology adopted the usual mesh refinement techniques present in the finite element method (FEM) simulations implemented in the ANSYS program. The loads applied on the floors basically related to aerobics and coordinated jumps are simulated through three different dynamic loading models. An extensive dynamic analysis was developed on the investigated structural model and the system dynamic response was obtained, based on the displacement and accelerations values, and compared to the limits recommended by standards and design criteria. It should be noted that the dynamic structural response of the investigated floors violates the human comfort design criteria and indicates excessive vibration levels for the investigated dynamic loadings, corroborating the fact that the building should not have its occupation used, for example, to gyms.