Mestrado em Engenharia Civil

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http://repositorio.ufes.br/handle/10/17614

Nível: Mestrado Acadêmico
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Navegando Mestrado em Engenharia Civil por Assunto "Aço de alta resistência"

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    Modelagem numérica de pilares mistos de aço e concreto parcialmente revestidos com concreto e aço de alta resistência
    (Universidade Federal do Espírito Santo, 2022-11-29) Salgado, Naycou Giovani de Paula; Calenzani, Adenilcia Fernanda Groberio; https://orcid.org/0000000209369950; http://lattes.cnpq.br/9959808218883879; https://orcid.org/0000-0003-3772-1437; http://lattes.cnpq.br/1976049527332998; Azevedo, Macksuel Soares de; https://orcid.org/0000000330113420; http://lattes.cnpq.br/6726295161401220; Rodrigues, Monique Cordeiro; https://orcid.org/0000-0003-3876-4893; http://lattes.cnpq.br/9392939752668118
    The construction industry undergoes constant changes to keep up with the evolution of structural systems. This can be noticed by the incessant industrialization of the structural elements used in construction, that is, the transition from handmade models to elements designed, prefabricated, and transported from industry to construction site. In this context, the use of partially encased composite columns with high strength concrete has increased visibility in projects given their precision and constructive speed. Related to this evolution, this research aimed to perform a numerical simulation of partially encased composite columns made of high strength steel and concrete, to evaluate the resistant capacity and rigidity of the system. So, numerical models were proposed to simulate in the most realistic way possible the mechanical behavior of these columns when submitted to pure compression. Numerical modeling was performed in the ANSYS® software by the Finite Element Method (FEM). To simulate the plastic behavior of the materials, the von Mises failure criteria for steel and DruckerPrager (DP) were selected for concrete, in the latter, crushing and relieving concrete stresses were characterized by exponential HSD2 parameters. The numerical results of load versus shortening and load versus axial deformation were compared with experimental results from the literature and the proposed numerical model proved to be adequate. A wide parametric analysis was performed with the objective of evaluating the influence of physical parameters, such as, column length (L), steel yield strength (fy) and characteristics compressive strength of concrete (fck). The results of the parameterization were compared with the predictions of ABNT NBR 8800:2008. It was concluded that the compressive strength of partially encased composite columns high strength steel and concrete can be accurately estimated by the equations of ABNT NBR 8800:2008.