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Authors
Advisor(s)
Abstract(s)
O principal objetivo do presente trabalho consiste na caracterização do comportamento dinâmico de um edifício de betão armado, por intermédio de avaliação numérica e experimental, procedendo à análise e comparação de resultados.
O estudo começa com a exposição dos fundamentos da dinâmica de estruturas: estudo das formulações no domínio do tempo e da frequência relacionado com sistemas de um grau de liberdade e sistemas com vários graus de liberdade.
Abordam-se os principais conceitos sobre os ensaios de vibração, apresentando e explicando os principais tipos (dando especial destaque aos ensaios de vibração ambiental), os equipamentos utilizados, o seu planeamento e as metodologias envolvidas no pré-processamento e processamento da informação experimental.
São descritos os fundamentos da identificação modal, apresentando um dos métodos mais conhecido e adequado para caracterizar o comportamento dinâmico de uma estrutura com três graus de liberdade, a partir de séries temporais de aceleração geradas experimentalmente.
Atendendo que um dos objetivos do trabalho é a obtenção do modelo de cálculo estrutural a partir do modelo BIM (Building Information Modeling), é feita uma apresentação sobre o estado do conhecimento desta metodologia, assim: é descrito o conceito BIM, a ideologia pretendida na sua adoção, a sua interoperabilidade, bem como a sua aplicabilidade prática relativamente a um caso de aplicação de carácter académico.
Por último, apresenta-se um estudo de caso referente à caracterização do comportamento dinâmico de um edifício de betão armado com seis pisos. Começa-se com a descrição do edifício e apresenta-se o modelo desenvolvido através da plataforma BIM, nomeadamente a ferramenta Revit no qual integra o modelo geométrico e analítico. Abordam-se as metodologias de intercâmbio de informações entre o aplicativo de modelação e o programa de cálculo estrutural SAP2000. Os resultados obtidos a partir do modelo numérico são comparados com os resultados obtidos experimentalmente através da realização do ensaio de vibração ambiental.
The main objective of the present work is to characterize the dynamic behavior of a reinforced concrete building, through numerical and experimental evaluation by analyzing and comparing the results. The study begins with the exposition of the fundamentals of the dynamics of structures: the formulations in the time domain and in the frequency domain related to a single degree of freedom system and multi degree of freedom system, and then, is shown a study of the state-space formutation related to the both system. The main concepts about vibration testing are discussed, presenting and explaining the main types (emphasizing the environmental vibration tests), the equipment used, their planning and the methodologies involved in the pre-processing and processing of experimental information. The fundamentals of modal identification are described, presenting one of the best known and appropriate methods to characterize the dynamic behavior of a structure with multi degree of freedom from experimentally generated time series of acceleration. Finally, a case study concerning the characterization of the dynamic behavior of a four-story reinforced concrete building is presented. Considering that one of the objectives of the work is to obtain the structural calculation model from BIM model (Building Information Modeling), it is described the BIM concept, the ideology intended in its adoption, its interoperability as well as its practical applicability in relation to a case of academic application. Finally, a case study concerning the characterization of the dynamic behavior of a four-story reinforced concrete building is presented. Firstly, the model is developed through the BIM platform, namely the Revit tool in which integrates the geometric and analytical model. The methodologies of information exchange between this modeling application and the structural calculation program SAP2000 are discussed. The results obtained from the numerical model are compared with the results obtained experimentally by performing the environmental vibration test.
The main objective of the present work is to characterize the dynamic behavior of a reinforced concrete building, through numerical and experimental evaluation by analyzing and comparing the results. The study begins with the exposition of the fundamentals of the dynamics of structures: the formulations in the time domain and in the frequency domain related to a single degree of freedom system and multi degree of freedom system, and then, is shown a study of the state-space formutation related to the both system. The main concepts about vibration testing are discussed, presenting and explaining the main types (emphasizing the environmental vibration tests), the equipment used, their planning and the methodologies involved in the pre-processing and processing of experimental information. The fundamentals of modal identification are described, presenting one of the best known and appropriate methods to characterize the dynamic behavior of a structure with multi degree of freedom from experimentally generated time series of acceleration. Finally, a case study concerning the characterization of the dynamic behavior of a four-story reinforced concrete building is presented. Considering that one of the objectives of the work is to obtain the structural calculation model from BIM model (Building Information Modeling), it is described the BIM concept, the ideology intended in its adoption, its interoperability as well as its practical applicability in relation to a case of academic application. Finally, a case study concerning the characterization of the dynamic behavior of a four-story reinforced concrete building is presented. Firstly, the model is developed through the BIM platform, namely the Revit tool in which integrates the geometric and analytical model. The methodologies of information exchange between this modeling application and the structural calculation program SAP2000 are discussed. The results obtained from the numerical model are compared with the results obtained experimentally by performing the environmental vibration test.
Description
Dissertação de natureza científica para obtenção do grau de mestre em Engenharia Civil, na Área de Especialização de Estruturas
Keywords
Comportamento dinâmico Dynamic behaviour Ensaios de vibração ambiental Ambient vibrations tests Modelagem de informações de construção Building information modeling Frequências naturais Natural frequencies Modos de vibração Mode shapes Modelo Revit Revit model Modelo numérico Numerical model Análise estrutural Structural analysis
Pedagogical Context
Citation
CARDOSO, Nailson Augusto Freire - Caracterização numérica e experimental do comportamento dinâmico de um edifício de betão armado. Lisboa: Instituto Superior de Engenharia de Lisboa, 2018. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa