Investigação experimental e numérica sobre o efeito da interação dinâmica pessoa - estrutura e análise de conforto humano de pisos de edifícios submetidos ao caminhar humano

• Autor(a) principal: Aguiar, Jefferson Viana
• Data de Publicação: 2021
• Outros Autores: [e-mail]
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/17189
• topic: Civil engineering; Floors; Structural analysis (Engineering); Vibration; Human comfort; Finite element method; Engenharia civil; Pavimentos; Análise estrutural (Engenharia); Vibração; Conforto humano; Método dos elementos finitos; ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS

This research work aims to evaluate the effect of the people-structure interaction on the dynamic behaviour of floors, qualitatively and quantitatively, based on the development of experimental tests and numerical modelling, considering the use of biodynamic systems associated with “spring-mass-damper” systems with one degree of freedom (SDOF), in order to represent the people’s dynamic behaviour. Therefore, the study was developed considering the structural model of a steel-concrete composite floor, associated to the building project consisting of 12 floors, existing and designed to receive a teaching hospital, located in the city of Belo Horizonte/MG. The investigated floor presents a system of steel-concrete composite columns and beams, and steel deck slabs, with a total area of 1300m². Initially, experimental tests (free and forced vibration tests), were developed on the building 8th floor. On the other hand, a finite element model, developed based on the use of the ANSYS computer program, was developed taking into account the physical and geometric characteristics defined in the project, aiming to calibrating the experimental results. Aiming to evaluate the global dynamic behaviour of the structural model, a numerical modal analysis was performed on the 8th floor slabs of the system, and the results were calibrated based on the experimental response determined in the free vibration tests. Then, the experimental forced vibration tests were carried out on the composite floor, based on the use of different step frequencies, in addition to numerous trajectories adopted for the people walking on the slabs. After the experimental results calibration phase, the human comfort of the investigated floor was assessed through the development of a parametric study, by evaluating the influence of people’s step frequencies, number of people walking and stationary on the floor, structural damping, and also different trajectories of people walking on the structure. The composite floor dynamic response was evaluated based on the displacement and acceleration values, and the results were compared with those calculated using traditional dynamic loading mathematical models (“only-force models”); and with recommended limits for excessive vibrations related to the traditional design codes, aiming to study the human comfort of the structure. The results found throughout this investigation point out to relevant quantitative reductions regarding the floor dynamic response, when the biodynamic systems were considered in the dynamic analysis, when compared with the results provided by the “only-force” mathematical models, demonstrating the importance of the people-structure dynamic interaction effect for human comfort assessments.