Numerical analysis of static and dynamic characteristics of large-span pipe-framed plastic greenhouses

Wang, Cong; Xu, Zhanyang; Jiang, Yingchun

doi:10.1016/j.biosystemseng.2023.06.013

Cited by 2 publications

(1 citation statement)

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“…Moriyama et al observed that the maximum permissible snow load on a greenhouse frame diminishes as ridge heights increase [17]. Wang et al concluded that the ultimate load-bearing capacity of an LASF decreases as the span increases, based on the simulation results [18]. They also determined that there is a positive correlation between ultimate bearing capacity and the section modulus and size of the frame.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Structural Performance in a Single-Tube Frame for 12 m-Span Chinese Solar Greenhouses Subjected to Snow Loads

Li,

Wei,

Zhao

et al. 2024

Agronomy

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To address the structural concerns of a 12.0 m-span landing assembled single-tube frame (LASF) for Chinese solar greenhouses subjected to snow loads, the internal forces and deformations of LASF and its reinforced counterpart (RLASF) were numerically simulated to determine the ultimate bearing capacities (Lu) and the failure loads (Lf). During the simulations, steel tubes were modeled as beam188 elements and cables as link180 elements. The frame constraints and the connections were assumed to be fixed supports and rigid, respectively. The loads were determined according to the Chinese standard (GB51183-2016). Simulations revealed that the LASF and RLASF primarily withstand bending moments and are prone to strength failures under snow loads. Both exhibited lower Lu and Lf under non-uniform snow loads than under uniform snow loads. The results also indicated that crop loads could deteriorate the structural safety of the LASF and RLASF. Lu and Lf were found to be proportional to the section modulus of the tubes. The effects of wind loads and initial geometry imperfections on Lf of the LASF and RLASF can be neglected. Furthermore, the RLASF exhibited higher Lf compared to the LASF. Steel usage of the RLASF could be further reduced by replacing circular tubes with rectangular tubes, making the RLASF a feasible option for constructing Chinese solar greenhouses.

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Section: Introductionmentioning

confidence: 99%