Título:	Estudo analítico-numérico e experimental de problemas de interação dinâmica fluido-estrutura com aplicação a barragens e eclusas de concreto
Outros títulos:	Analytic-numerical and experimental study of dynamic fluidstructure interaction problems with application to concrete dams and locks
Autor(es):	França Júnior, Davidson de Oliveira
E-mail do autor:	davidsonutfpr@gmail.com davidson.francajunior@gmail.com
Orientador(es):	Pedroso, Lineu José
Assunto:	Barragens Eclusas Barragens de concreto Contraforte
Data de publicação:	4-out-2022
Data de defesa:	2-ago-2022
Referência:	FRANÇA JÚNIOR, Davidson de Oliveira. Estudo analítico-numérico e experimental de problemas de interação dinâmica fluido-estrutura com aplicação a barragens e eclusas de concreto. 2022. xxx, 262 f., il. Tese (Doutorado em Estruturas e Construção Civil) — Universidade de Brasília, Brasília, 2022.
Abstract:	Concrete gravity dams and locks are structures, almost always large in size, which have a wide variety of uses, according to the needs of each region where they are implemented. In the engineering of these structures, it is essential to guarantee minimum safety conditions, once their rupture can generate real catastrophes both economically and socially and environmentally. As a result, this paper addresses an analytical-numerical and experimental study of dynamic fluid-structure interaction problems, with application to concrete gravity dams and locks. At first, a simplified analytical methodology, called the Prescribed Pressure Field Artifice (PPFA), was made to determine the decoupled and fluid-structure coupled natural frequencies associated with the additional mass dominant modes in an incompressible regime. The PPFA covers structures with constant or linearly varying inertia, and makes it possible to obtain the frequencies associated with impulsive hydrodynamic pressures for different vibration modes in a dam-reservoir and lock-reservoir coupled problem. The results obtained by PPAF were compared with the Finite Element Method (FEM), using ANSYS® software, with the Pseudo-dynamic Method, with the Modified Transfer Matrix Method (MTMM) and with literature results. The comparative studies were applied to several dam and lock geometries. The responses were satisfactory and showed percentage differences of less than 5% in the incompressible regime. In the compressible regime the percentage differences were larger (around 10 to 20%). The PPAF was also applied in determining frequencies at Pina Flat Dam, Tsuruda Dam and Koyna Dam. A parametric study evaluating the influence of parameters related to the geometric dimensions of the reservoir coupled with dams and locks was presented. Furthermore, in the analysis of lock-reservoir interaction, a study was done to investigate the natural frequencies and vibration modes associated with free surface sloshing waves with application to Tucuruí lock. Finally, to complement the study of sloshing, the work includes an experimental approach. A harmonic vibrating table was built and used to study the free surface sloshing effects in a reservoir with rigid boundaries. In this perspective, the Motion Capture by Video Technique (MCVT) was used to acquire the experimental results. The comparative studies on natural frequencies and convective (sloshing) pressures obtained analytically, numerically and experimentally showed maximum percentage differences of 7.32%. Therefore, this work contributes to several aspects related to fluid-structure interaction in dams and locks.
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Civil e Ambiental (FT ENC)
Informações adicionais:	Tese (doutorado) — Universidade de Brasília, Programa de Pós-Graduação em Estruturas e Construção Civil, Faculdade de Tecnologia, 2022.
Programa de pós-graduação:	Programa de Pós-Graduação em Estruturas e Construção Civil
Licença:	A concessão da licença deste item refere-se ao termo de autorização impresso assinado pelo autor com as seguintes condições: Na qualidade de titular dos direitos de autor da publicação, autorizo a Universidade de Brasília e o IBICT a disponibilizar por meio dos sites www.bce.unb.br, www.ibict.br, http://hercules.vtls.com/cgi-bin/ndltd/chameleon?lng=pt&skin=ndltd sem ressarcimento dos direitos autorais, de acordo com a Lei nº 9610/98, o texto integral da obra disponibilizada, conforme permissões assinaladas, para fins de leitura, impressão e/ou download, a título de divulgação da produção científica brasileira, a partir desta data.
Agência financiadora:	Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
Aparece nas coleções:	Teses, dissertações e produtos pós-doutorado

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