华东型连栋塑料温室的拱顶曲线研究  

Investigation of the vault curve of East-China type multi-span greenhouse

作　　者：陈志银[1] 沈明卫[1] 

机构地区：[1]浙江大学农业生物环境工程研究所,杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2005年第4期465-470,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：浙江省自然科学基金资助项目(M303436).

摘　　要：在综合分析原有雪载荷计算方法的基础上,应用微分的思想探索更能反映拱顶特性的雪荷载估算方法.并在此基础上,以最大抗雪载能力为目标,优化了华东型连栋塑料温室的拱顶切线角.对东西走向和南北走向的华东型连栋塑料温室采用曲线积分的方法,在考虑相互遮荫的情况下,模拟计算了在冬至日正午时各种拱项切角双圆弧屋面的采光性能.结果表明:当拱项切线角为15°～20°时,拱顶具有最佳的抗积雪性能,而拱顶的采光性能随拱顶切角的变化不明显.Based on synthesis and analysis of traditional snow-load calculation method, an improvement was proposed with an aim of reflecting snow-load of the vault curve characteristics more exactly. Optimization of the vault tangential angle of East-China multi-span greenhouse was attained, which was accomplished by applying the principle of maximum snow-load bearing capacity. Meanwhile, taking the mutual shading effect of the neighboring spans into account, the direct solar radiation of arc vault of both east-west and south-north oriented multi-span greenhouse at noon on the day of winter solstice was calculated using the curvilinear integral method. Our result showed that greenhouse would have maximum snow-load bearing capacity when its vault tangential angle was in the range of 15°-20°, whereas the solar radiation collection ability of greenhouse was not significantly affected by variation in tangential angle of the vault.

关 键 词：连栋塑料温室 雪载荷 采光性能 

分 类 号：S26[农业科学—农业水土工程] TU311.2[农业科学—农业工程]