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.
Highlights
In recent years, the greenhouse structures used in horticulture facilities have become larger and lighter
Fluid dynamics are in good agreement, with a correlation coefficient of a fluid dynamics analysis analysis is conducted for the actual model, and the pressure coefficient for wind load is compared is conducted for the actual model, the in pressure coefficient for wind load is is compared with the with the EN1991-1-4 standard, as and shown
The prediction of the life of prediction of thestructures life of greenhouse structures must consider the effect self-weight, and it is reasonable greenhouse must consider the effect of self-weight, and it is of reasonable to compensate static to compensate load the analysis of fatigue estimation generated load in thestatic analysis ofin fatigue estimation stress generated bystress dynamic load. by dynamic load
Summary
The greenhouse structures used in horticulture facilities have become larger and lighter. In this study, the existing fatigue analysis method is applied and analyzed model or the dynamic characteristics of wind load as a method of evaluating the maximum stress [13,14,15,16]. Only compared the degree of the experiment and analysis of wind pressure the maximum stressThey of the frame at the maximum wind speed through static structural analysis of a coefficients and evaluated the appropriateness applying the resultload to theordesign of wind load, simple model. These studies were conducted forofonly one dynamic one static load.
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