This paper provides guidelines for cyclic loading bending test simulation and modal analysis of a reinforced concrete I-beam. For this purpose, experimental and numerical cyclic bending test were performed. In the experimental study, the natural frequencies of the structure in the intact and damaged states were measured. The simulation of the cyclic bending test was done with Concrete Damaged Plasticity model (CDP), implemented in Abaqus finite element software. Based on the experimental results, different constitutive models for concrete were evaluated. In order to evaluate the dynamic behavior of the structure in the numerical model, the automatic calibration of the finite element model by Genetic Algorithm (GA) was used. With the calibrated numerical model, methodologies for estimating the overall damage of the structure based on its dynamic properties were proposed. The results confirm that the well-designed numerical model is able to efficiently represent the cyclic loading bending test. In addition, the proposed global damage estimates demonstrate the coherence between numerical and experimental models.

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Em primeiro lugar agradeço a Deus pela dádiva da vida e por renovar a cada momento a minha força. Sem Ele, não estaria aqui agradecendo a todos que contribuíram no desenvolvimento deste trabalho. Aos meus pais, Paulo e Sueli, por sonharem os meus sonhos. Obrigada por preencherem os meus dias com amor e carinho. Aos meus familiares pelos bons momentos. Às minhas afilhadas, Antonella, Melissa e Vitória, por despertarem os meus melhores sentimentos. Ao meu orientador, professor Ricardo Carrazedo, pela valiosa e indispensável orientação. Agradeço pela dedicação, atenção e paciência ao longo da trajetória. Aos professores Gustavo Siqueira e Maíra Silva pelas contribuições na etapa de defesa. E, aos professores Edson Leonel e Vladimir Haach, pelas sugestões na qualificação. Aos funcionários e professores do Departamento de Estruturas da EESC-USP pelo apoio em todos os momentos. Agradeço ao Dorival por todo auxílio com os programas. Ao professor e amigo, Marcelo Barros, por ter acreditado que eu era capaz de ser uma pesquisadora. Agradeço pelos anos de orientação nos projetos de iniciação científica. Aos professores da UFJF pela formação acadêmica e amizade. Às amigas da UFJF, Kamila e Thais, por serem tão incríveis. Ao Lucas Teotônio, meu irmão do coração, pelo incentivo e carinho diário. Aos amigos de longa data por tornarem a caminhada mais leve. Em especial, Carol, Gláucia,

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Strain-Hardening Cement-Based Composites (SHCCs) exhibit high toughness and durability, allowing the design of resilient structures. Despite the exceptional properties of SHCC and the current modeling techniques, the widespread use of the composite is limited. One limiting factor is developing and validating analytical models that could be used for optimizing mixes and designing structural elements. Furthermore, the composite mechanical response is complex and depends on several phenomena, such as fiber pullout, fiber orientation and distribution, size effect, fiber content, group effect, embedding length, fiber dimensions, and matrix strength. In this context, this research presents the state-of-the-art on the micro- and mesomechanisms occurring in SHCC during cracking and robust techniques to predict its tensile behavior accounting for such phenomena already proved experimentally. The study is relevant for designers and the scientific community because it presents the gaps for the research groups to develop new investigations for consolidating SHCC, which is a material to produce resilient structures.