Análise do comportamento estrutural de blocos de concreto armado sobre estacas como fundação para aerogerador onshore
The growth of the wind energy industry in Brazil has demanded projects of big size foundations, which in most cases are pile caps. These structural elements spend close to 300 cubic meters of concrete and 20 tons of steel in its construction. In this context, a deepest structural analysis about t...
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| Formato: | Dissertação |
| Idioma: | por |
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/25832 |
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| Resumo: | The growth of the wind energy industry in Brazil has demanded projects of big size
foundations, which in most cases are pile caps. These structural elements spend close
to 300 cubic meters of concrete and 20 tons of steel in its construction. In this context,
a deepest structural analysis about this kind of wind turbine foundations should
contribute to improvement of projects in this sector, that are of great relevance for the
development of the Brazilian energy matrix. In that way, this work proposes to analyze
the structural behavior of reinforced concrete pile caps, as onshore wind turbine
foundations, using numerical models. In order to do, eight finite elements models were
constructed, with the aid of the ANSYS V17 and SAP2000 V17 softwares. It was
adopted as variables: the finite element type used for modeling the pile cap and piles
(solid or shell); the soil representation (spring or semi-infinite space); and, the
consideration or not of the soil under the pile cap base. All the materials constitutive
models were considered as with linear elastic behavior. The interest results were: pile´s
reaction; division of loading between soil and piles; pile cap´s displacement; radial
normal stress and bending moments in the pile cap; and, the increase of vertical
stresses in the soil. The models designed in solid elements and plate elements
demonstrated good compatibility between the found values. In some models, the
numerical analysis showed results against the structural safety of the foundation when
the soil under the pile cap is not considered. |
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