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Appl. Sci. 2017, 7(12), 1274; doi:10.3390/app7121274

Fatigue Analysis of Greenhouse Structure under Wind Load and Self-Weight

Research & Business Cooperation Center, Institute for Advanced Engineering, 175-28, Goan-ro 51, beon-gil, Baegam-myeon, Yongin-si KS009, Korea
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Received: 7 November 2017 / Revised: 28 November 2017 / Accepted: 29 November 2017 / Published: 7 December 2017
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Abstract

The design strength of a greenhouse structure is generally determined by analyzing strength after applying wind load using the wind pressure coefficient according to a design guide. Until now, the stability analysis for wind load has been performed through static structural analysis. However, a greenhouse is subjected to dynamic wind loads of various amplitudes, and it is reasonable to judge stability through fatigue analysis. For fatigue analysis, a stress-normalized model was constructed based on the square of wind speed, and the value obtained by squaring wind speed was used as dynamic load time data. Life cycle was calculated under stress generated by self-weight by compensating fatigue estimation stress. Furthermore, the effect of self-weight was examined and errors of up to 21% were obtained depending on the configuration of the stress-normalized model. When self-weight and wind speed were applied simultaneously, the effect of self-weight reduced when the stress-normalized model was used at high wind speed. Therefore, it is appropriate that the fatigue analysis is based on the fatigue stress model normalized by the square of wind speed, fatigue estimation stress is corrected to the static stress due to self-weight, and the square of wind speed is used as the dynamic load. View Full-Text
Keywords: computational fluid dynamics; structural static analysis; normal mode; pressure coefficient; Venlo-peach-type greenhouse; wind speed; fatigue; life cycle computational fluid dynamics; structural static analysis; normal mode; pressure coefficient; Venlo-peach-type greenhouse; wind speed; fatigue; life cycle
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hur, D.-J.; Kwon, S. Fatigue Analysis of Greenhouse Structure under Wind Load and Self-Weight. Appl. Sci. 2017, 7, 1274.

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