| Élément Dublin Core | Valeur | Langue |
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| dc.contributor.author | Borges, Luana Ferreira | - |
| dc.contributor.author | Lameiras, Rodrigo de Melo | - |
| dc.date.accessioned | 2026-03-17T14:24:49Z | - |
| dc.date.available | 2026-03-17T14:24:49Z | - |
| dc.date.issued | 2026-02 | - |
| dc.identifier.citation | BORGES, Luana Ferreira; LAMEIRAS, Rodrigo de Melo. Effects of concrete compressive strength and thickness onthenatural frequency of a prestressed concrete wind tower. Sustainability in Environment, [S. l.], v. 11, n. 1, 2026. DOI: https://doi.org/10.22158/se.v11n1p168. Disponível em: https://www.scholink.org/ojs/index.php/se/article/view/57119. Acesso em: 17 mar. 2026. | pt_BR |
| dc.identifier.uri | http://repositorio.unb.br/handle/10482/54269 | - |
| dc.language.iso | eng | pt_BR |
| dc.publisher | SCHOLINK INC. | pt_BR |
| dc.rights | Acesso Aberto | pt_BR |
| dc.title | Effects of concrete compressive strength and thickness onthenatural frequency of a prestressed concrete wind tower | pt_BR |
| dc.type | Artigo | pt_BR |
| dc.subject.keyword | Frequências naturais | pt_BR |
| dc.subject.keyword | Torres eólicas de concreto | pt_BR |
| dc.subject.keyword | Análise modal | pt_BR |
| dc.subject.keyword | Turbinas eólicas | pt_BR |
| dc.rights.license | (CC-BY) This work is licensed under a Creative Commons Attribution 4.0 International License. | pt_BR |
| dc.identifier.doi | https://doi.org/10.22158/se.v11n1p168 | pt_BR |
| dc.description.abstract1 | In wind tower design, the natural frequency must remain within a safe working range to avoid resonance. This study investigates the effects of concrete thickness and compressive strength on the first natural frequency of a 100 m prestressed concrete tower supporting a 5 MW turbine. Sixty-four models were analyzed using finite element modal analysis. The tower was modeled using 4 m Class 1 3D Bernoulli beam segments, each subdivided into ten elements, and the turbine was represented by a concentrated mass at the top. Two studies were conducted for concrete classes C30, C40, C50, and C60: one varying both base and top thickness (study 1), and another varying only the base thickness (study 2). For a given concrete class, increasing thickness resulted in a higher natural frequency, but with decreasing impact as thickness grew, indicating a tendency toward stabilization. Likewise, higher concrete strength increased the natural frequency, although the effect diminished at higher strength levels. For all geometries, the natural frequencies relative to C50 were 85.6% for C30, 93.3% for C40, and 103.9% for C60. | pt_BR |
| dc.contributor.affiliation | University of Brasília, Department of Civil and Environmental Engineering | pt_BR |
| dc.contributor.affiliation | University of Brasília, Department of Civil and Environmental Engineering | pt_BR |
| dc.description.unidade | Faculdade de Tecnologia (FT) | pt_BR |
| dc.description.unidade | Departamento de Engenharia Civil e Ambiental (FT ENC) | pt_BR |
| Collection(s) : | Artigos publicados em periódicos e afins
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