摘要
为研究极端风雪灾害下日光温室结构的加固对策,利用ANSYS有限元分析软件,考虑材料非线性、几何大变形以及结构非线性条件,建立日光温室单榀骨架模型.分别模拟风荷载、雪荷载、风主导风雪荷载、雪主导风雪荷载4种荷载工况下日光温室结构失稳破坏的全过程,得到了其失稳模式与结构荷载位移关系曲线,并根据失稳模式提出相应临时加固办法.结果表明:临时加固对日光温室抗风雪灾害能力提升明显,加固后日光温室结构对风荷载承载能力提升154%~300%,对雪荷载承载能力提升11%~129%,对风主导风雪荷载承载能力提升245%~273%,对雪主导风雪荷载承载能力提升203%~264%.
To investigate the reinforcement measures of solar greenhouse structure under extreme wind and snow disasters,the single frame model of solar greenhouse was established by ANSYS finite element analysis software with consideration of material nonlinearity,large geometric deformation and structural nonlinearity conditions.The whole processes of instability and failure for the solar greenhouse structure under four load conditions of wind,snow,wind-led blizzard and snow-led blizzard were respectively simulated.According to the instability mode and load-displacement relationship curve of the structure,the temporary reinforcement methods were proposed.The results show that the wind and snow resistance of the solar greenhouse is significantly improved after temporary reinforcement.The wind load bearing capacity is increased by 154%-300%,and the snow load bearing capacity is increased by 11%-129%.The wind-led blizzard bearing capacity is increased by 245%-273%,and the snow-led blizzard bearing capacity is increased by 203%-264%.
作者
杨升华
刘雪迎
蒋秀根
YANG Shenghua;LIU Xueying;JIANG Xiugen(College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China)
出处
《江苏大学学报（自然科学版）》
CAS
北大核心
2022年第1期45-53,共9页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(11672362)。
关键词
日光温室
风雪灾害
临时加固
失稳模式
承载能力
solar greenhouse
wind and snow disaster
temporary reinforcement
instability mode
bearing capacity
