Modelagem de sistemas biodinâmicos para avaliação do comportamento estrutural dinâmico de pisos mistos (aço-concreto) de edifícios submetidos a atividades humanas rítmicas

• Autor(a) principal: Campista, Fernanda Fernandes
• Data de Publicação: 2019
• 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/1/11471
• topic: Civil Engineering; Mixed construction; Structural analysis (engineering); Buildings; Steel-concrete composite floors; Biodynamic models; Structural dynamics; Experimental tests; Human comfort analysis; Numerical modelling; Engenharia civil; Construção mista; Análise estrutural (Engenharia); Edifícios; Pisos mistos (aço-concreto); Sistemas biodinâmicos; Dinâmica estrutural; Testes experimentais; Análise de conforto humano; Modelagem numérica; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL

The main objective of this research work is to investigate the dynamic structural response of building floors, when subjected to rhythmic human activities (aerobics), based on experimental tests and numerical modelling. The focus of this investigation is to assess the human comfort of floors, simulating the individuals based on the use of biodynamic systems. This research work considers the effect of the dynamic interaction individuals-structure, based on the use of biodynamic models corresponding to mass-spring-damping systems, with one degree of freedom (SDOF), in order to represent the people s dynamic behaviour. The dynamic characteristics of the biodynamic systems (mass, stiffness and damping) were determined based on experimental tests, and also based on the mathematical resolution of a classical optimization problem using Genetic Algorithms (GA). After that, traditional dynamic loading mathematical models ( force only models) are considered in the dynamic analysis to results comparisons. The analysed structural model is related to a steel-concrete composite floor with dimensions of 40m x 40m and total area of 1600m². The structure represents a typical interior floor of a commercial building used for aerobics. The composite floor is supported by steel columns and is currently submitted to aerobic rhythmic loads. The system is made from composite beams and a 100mm thick concrete slab and the columns height is equal to 4m. The numerical modelling of the structure was performed based on the use of the ANSYS computational program and utilizing the Finite Element Method (FEM) simulations. Thus, the dynamic response of the investigated composite floors was evaluated in terms of RMS of the peak accelerations, RMS and VDV values, based on current human comfort criteria. The results found along this investigation have indicated significant reductions of the peak accelerations values, when the biodynamic systems were considered in comparison with the results provided by the force only models.