农机化研究2024，Vol.46Issue(3)：154-160,7.
桁架拱塑料大棚骨架平面内竖向荷载受力性能试验
Experimental on Mechanical Performance of Truss Arch Plastic Greenhouse Skeleton Subjected to Vertical Load
摘要
Abstract
Truss arch plastic greenhouses are widely used in north cold region of China with a large amount.Due to heav-y snow loads and rough manufacture,greenhouse collapsed frequently in north cold region of China in winter which brought serious economic loss and even threaten personnel security.In consideration of this circumstance,the skeleton of greenhouse made of qualified steel was tested by vertical load.Taking rise of skeleton,distance of upper chord joint and height of truss arch as factors,the orthogonal experimental method was applied to design four truss arch plastic green-house skeletons with three factors and two levels.Moreover,the test device was designed.All skeleton models and test de-vice were manufactured and the test points were installed.Test phenomena,ultimate load and displacement data of skele-ton were obtained under vertical loading.The ultimate load data was analyzed and it shows that the factors affecting the ultimate carrying capacity of skeleton is:rise of skeleton ranks first,and distance of upper chord joint ranks second and height of truss arch is the least.3D linear finite element models of truss arch plastic greenhouse skeleton were established by using finite element software ABAQUS.The model was verified correct by comparison of the test and the calculated load-displacement at mid span and l/4.It shows that the elastic stage of the model can be used to analyze the properties of skeleton in service.All these work provide basis and cases for the following mechanical performance of truss arch plas-tic greenhouse during service state and the deep nonlinear buckling stability analysis using finite element method.关键词
桁架拱塑料大棚骨架/竖向荷载/受力性能/有限元分析Key words
truss arch plastic greenhouse skeleton/vertical load/mechanical performance/ABAQUS分类
农业科技引用本文复制引用
史旖旎,解恒燕,郑鑫,陈斌..桁架拱塑料大棚骨架平面内竖向荷载受力性能试验[J].农机化研究,2024,46(3):154-160,7.基金项目
黑龙江省自然科学基金联合引导项目(LH2019E072) （LH2019E072）
黑龙江八一农垦大学三横三纵支持计划项目(TDJH202005) （TDJH202005）
黑龙江八一农垦大学三纵基础(自然)项目(ZRCPY202223) （自然）
