International Journal of Agricultural Engineering

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Estimation of Wind Load on a Greenhouse and Evaluation of its Structural Stability


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1 Irrigation and Drainage Engineering Division, Central Institute of Agricultural Engineering, Bhopal (M.P.), India
     

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Among all the loads that act on the greenhouse, wind load is the major one. In India, the basic wind speed varies from 33 to 55 m/s. Along with wind speed, wind load also depend on the geometry, height to width ratio, effective frontal area etc. So greenhouse design should be customized as per the localized wind load. 'One size fits all approach' in greenhouse design may leads to failure of the structure or being expensive. Unfortunately the standard for greenhouse design is lagging far behind in India. In this experiment, wind load for the double arch type naturally ventilated greenhouse was estimated as per IS code 875 (part 3) and IS 14462: 1997. The design wind pressure estimated to be 772 N/m2 and wind load on the roof of the greenhouse is 222 kN (Suction) and 185 kN (Pressure). A model of the greenhouse is developed by means simulation with Finite Element Method using ANSYS 15.0 to test its stability at the calculated wind load. The truss and columns are studied with deflections and failure zones diagrams and possible failures were found out to redesign the elements.

Keywords

Wind Load, Structural Stability, FEM, Pressure Co-Efficient, Truss.
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  • Anonymous (2011). Greenhouse a reference manual, NCPAH, Ministry of Agriculture, Govt. of India.

  • ANSYS, Inc. (2009). ANSYS Strcutural Analysis guide. ANSYS 15.0.

  • CEN (1995). EN 1991-1-4:2005-Eurocode-1: Actions on structures - Part 1-1-4: General actions - Wind actions 1-1-4. Comite Europeen de Normalisation, Brussels.

  • CEN (2001). EN-13031-1 Final Draft: Greenhouses: Design and construction Part 1: Commercial production greenhouses. Comite Europeen de Normalisation, Brussels.

  • CEN (2003). EN 1991-1-4:2005-Eurocode-1: Actions on structures-Part 1-1-4: General actions - Wind actions 1-1-4. Comite Europeen de Normalisation, Brussels.

  • IS 875: part 3 (1987). Code of practice for design load (other than earthquake) for buildings and structures.

  • IS 14462: 1997. Recommendation for layout design and construction of greenhouse structure.

  • Hoxey, R.P. and Richardson, G.M. (1984). Measurements of wind loads on full-scale film plastic clad greenhouses. J. Wind Eng. Ind. Aerodyn., 16 : 57-83 (1984).

  • Singh, B. and Sirohi, N.P.S (2008). Protected cultivation of vegetable in India: problems and future prospects. Acta Hort., 710 : 339-342.

  • Tiwari, K.N.(2010). Research Achievements-PFDC IIT Kharagpur, Department of Agricultural and Food Engineering, IIT Kharagpur.

  • Von Elsner B., Briassoulis D., Waaijenberg D., Mistriotis A., Zabeltitz von Chr., Gratraud J., Russo G. and SuayCortes, R. (2000). Review of structural and functional characteristics of greenhouses in European Union countries: Part I, Design Requirements. J. Agric. Engg. Res., 75 : 1-16.

  • Von Elsner, B., Briassoulis, D., Waaijenberg, D., Mistriotis, A., Zabeltitz von Chr., Gratraud J., Russo G. and SuayCortes R. (2000). Review of structural and functional characteristics of greenhouses in European Union countries: Part II, Design Requirements. J. Agric. Engg. Res., 75 : 111-126.


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  • Estimation of Wind Load on a Greenhouse and Evaluation of its Structural Stability

Abstract Views: 254  |  PDF Views: 0

Authors

Ajit K. Nayak
Irrigation and Drainage Engineering Division, Central Institute of Agricultural Engineering, Bhopal (M.P.), India
K. V. Ramana Rao
Irrigation and Drainage Engineering Division, Central Institute of Agricultural Engineering, Bhopal (M.P.), India

Abstract


Among all the loads that act on the greenhouse, wind load is the major one. In India, the basic wind speed varies from 33 to 55 m/s. Along with wind speed, wind load also depend on the geometry, height to width ratio, effective frontal area etc. So greenhouse design should be customized as per the localized wind load. 'One size fits all approach' in greenhouse design may leads to failure of the structure or being expensive. Unfortunately the standard for greenhouse design is lagging far behind in India. In this experiment, wind load for the double arch type naturally ventilated greenhouse was estimated as per IS code 875 (part 3) and IS 14462: 1997. The design wind pressure estimated to be 772 N/m2 and wind load on the roof of the greenhouse is 222 kN (Suction) and 185 kN (Pressure). A model of the greenhouse is developed by means simulation with Finite Element Method using ANSYS 15.0 to test its stability at the calculated wind load. The truss and columns are studied with deflections and failure zones diagrams and possible failures were found out to redesign the elements.

Keywords


Wind Load, Structural Stability, FEM, Pressure Co-Efficient, Truss.

References