Numerical Simulation of Multi-Span Greenhouse Structures
Greenhouses had to be designed to sustain permanent maintenance and crop loads as well as the site-specific climatic conditions, with wind being the most damaging. However, both the structure and foundation are regularly empirically calculated, which could lead to structural inadequacies or cost ine...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/10/11/499 |
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| author | María S. Fernández-García Pablo Vidal-López Desirée Rodríguez-Robles José R. Villar-García Rafael Agujetas |
| author_facet | María S. Fernández-García Pablo Vidal-López Desirée Rodríguez-Robles José R. Villar-García Rafael Agujetas |
| author_sort | María S. Fernández-García |
| collection | DOAJ |
| description | Greenhouses had to be designed to sustain permanent maintenance and crop loads as well as the site-specific climatic conditions, with wind being the most damaging. However, both the structure and foundation are regularly empirically calculated, which could lead to structural inadequacies or cost ineffectiveness. Thus, in this paper, the structural assessment of a multi-tunnel greenhouse was carried out. Firstly, wind loads were assessed through computational fluid dynamics (CFD). Then, the buckling failure mode when either the European Standard (EN) or the CFD wind loads were contemplated was assessed by a finite element method (FEM). Conversely to the EN 13031-1, CFD wind loads generated a suction in the 0–55° region of the first tunnel and a 60% reduction of the external pressure coefficients in the third tunnel was not detected. Moreover, the first-order buckling eigenvalues were reduced (32–57%), which resulted in the need for a different calculation method (i.e., elastoplastic analysis), and global buckling modes similar to local buckling shape were detected. Finally, the foundation was studied by the FEM and a matrix method based on the Wrinkler model. The stresses and deformations arising from the proposed matrix method were conservative compared to those obtained by the FEM. |
| first_indexed | 2024-03-10T15:20:28Z |
| format | Article |
| id | doaj.art-252a13f9c7a341aa9150edf2388f64ee |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-10T15:20:28Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-252a13f9c7a341aa9150edf2388f64ee2023-11-20T18:28:08ZengMDPI AGAgriculture2077-04722020-10-01101149910.3390/agriculture10110499Numerical Simulation of Multi-Span Greenhouse StructuresMaría S. Fernández-García0Pablo Vidal-López1Desirée Rodríguez-Robles2José R. Villar-García3Rafael Agujetas4Department of Forest and Agricultural Engineering, School of Agricultural Engineering, University of Extremadura, Av. Adolfo Suarez s/n, 06071 Badajoz, SpainDepartment of Forest and Agricultural Engineering, School of Agricultural Engineering, University of Extremadura, Av. Adolfo Suarez s/n, 06071 Badajoz, SpainDepartment of Forest and Agricultural Engineering, School of Agricultural Engineering, University of Extremadura, Av. Adolfo Suarez s/n, 06071 Badajoz, SpainDepartment of Forest and Agricultural Engineering, Universitary Center of Plasencia, University of Extremadura, Av. Virgen del Puerto 2, 10600 Plasencia, SpainDepartment of Mechanical, Energy and Materials Engineering, School of Industrial Engineering, University of Extremadura, Avda. de Elvas s/n, 06006 Badajoz, SpainGreenhouses had to be designed to sustain permanent maintenance and crop loads as well as the site-specific climatic conditions, with wind being the most damaging. However, both the structure and foundation are regularly empirically calculated, which could lead to structural inadequacies or cost ineffectiveness. Thus, in this paper, the structural assessment of a multi-tunnel greenhouse was carried out. Firstly, wind loads were assessed through computational fluid dynamics (CFD). Then, the buckling failure mode when either the European Standard (EN) or the CFD wind loads were contemplated was assessed by a finite element method (FEM). Conversely to the EN 13031-1, CFD wind loads generated a suction in the 0–55° region of the first tunnel and a 60% reduction of the external pressure coefficients in the third tunnel was not detected. Moreover, the first-order buckling eigenvalues were reduced (32–57%), which resulted in the need for a different calculation method (i.e., elastoplastic analysis), and global buckling modes similar to local buckling shape were detected. Finally, the foundation was studied by the FEM and a matrix method based on the Wrinkler model. The stresses and deformations arising from the proposed matrix method were conservative compared to those obtained by the FEM.https://www.mdpi.com/2077-0472/10/11/499windcomputational fluid dynamicsbucklingfinite element methodmatrix modelstructure and foundation |
| spellingShingle | María S. Fernández-García Pablo Vidal-López Desirée Rodríguez-Robles José R. Villar-García Rafael Agujetas Numerical Simulation of Multi-Span Greenhouse Structures Agriculture wind computational fluid dynamics buckling finite element method matrix model structure and foundation |
| title | Numerical Simulation of Multi-Span Greenhouse Structures |
| title_full | Numerical Simulation of Multi-Span Greenhouse Structures |
| title_fullStr | Numerical Simulation of Multi-Span Greenhouse Structures |
| title_full_unstemmed | Numerical Simulation of Multi-Span Greenhouse Structures |
| title_short | Numerical Simulation of Multi-Span Greenhouse Structures |
| title_sort | numerical simulation of multi span greenhouse structures |
| topic | wind computational fluid dynamics buckling finite element method matrix model structure and foundation |
| url | https://www.mdpi.com/2077-0472/10/11/499 |
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