Dynamic response analysis of a whole steel frame solar greenhouse under wind loads

Abstract

In recent years, whole steel frame steel greenhouses have become increasingly prevalent. With the characteristics of large flexibility and small mass, whole steel frame steel greenhouses are sensitive to wind loads. However, studies on the safety of whole steel frame steel greenhouses under wind loads are still limited. In this study, a 10 m span whole steel frame solar greenhouse was taken as the research objective. Taking the Davenport spectrum as the target spectrum, the time history of the wind speed was simulated by the harmonic superposition method. The finite element model of the greenhouse structure was established using ANSYS software. The simulated wind pressure was applied on the greenhouse structure for dynamic response analysis. The dynamic response results were compared with the static analysis results under average wind load. The results showed that the greenhouse structure mainly bears bending stress under wind load. The bending stress, axial stress and displacement of the greenhouse skeleton under average wind loads are lower than those under instantaneous wind loads. It is necessary to consider the dynamic characteristics of wind loads in the design of solar greenhouses. A wind-induced vibration coefficient is obtained, which can be used to convert the dynamic load into the equivalent static load and improve its design efficiency.

Optimal Section Design of Korean Agricultural Greenhouse Response to Climate Change Based on Monte Carlo Simulation

“…In addition, we calculated safety by the average load and reliability using the probability load. In skeletal structures such as greenhouses, the axial force (compression, tensile) and shear force are very small compared to bending stress [36,37]. Therefore, we only considered bending stress as the maximum cross-sectional force to evaluate safety and reliability.…”

Free vibrations of spatial frame structures: Analytical modelling and solution

“…Ranjbaran (2014) explores the effect of stiffening members on the vibrations of frame structures. Li et al (2022) investigate the dynamic behaviour of a solar greenhouse modelled as a three-dimensional frame structure subjected to wind loads. Lumped mass properties, often employed to represent complicated mechanical systems, simplify the problems with frame dynamics (Rezaiee-Pajand and Khajavi, 2011).…”