两种日光温室钢骨架结构安全性能分析

发布时间：2018-01-16 05:07

本文关键词：两种日光温室钢骨架结构安全性能分析　出处：《甘肃农业大学学报》2016年06期 　论文类型：期刊论文

【摘要】：【目的】对两种传统日光温室骨架结构(钢拱架结构和钢桁架结构骨架)的安全性进行力学分析.【方法】以甘肃省酒泉市的气象条件为例,利用建筑结构计算理论及ANSYS计算软件,两种温室骨架均采用Q235钢,钢拱架拱杆为壁厚3.25mm的DN25镀锌钢管;钢桁架上弦杆为壁厚3.25mm的DN25镀锌钢管,下弦杆为φ12圆钢,腹杆为φ10圆钢;温室结构跨度8m,脊高4m,骨架间距1.0m;前屋面形式为二折式,即前半部分为弧长约为5m的拱形结构,后半部分为长度约为3m的直杆,采光前屋面角66°,直杆与水平面夹角15°,后屋面仰角45°.【结果】在荷载作用的两种工况下(工况1:恒载+使用活荷载+屋面集中活荷载+雪载;工况2:恒载+使用活荷载+屋面集中活荷载+风载),钢拱架结构应力薄弱部位的实际最大应力均超过了材料的强度设计应力值215 MPa,骨架多处部位受力不安全,故该钢拱架存在安全隐患;钢桁架结构骨架所有截面处的应力均小于材料的强度设计应力值,受力安全,该结构安全可用.【结论】钢桁架结构的日光温室,适合大面积推广应用.
[Abstract]:[objective] to analyze the safety of two traditional solar greenhouse skeleton structures (steel arch structure and steel truss frame). [methods] taking the meteorological conditions of Jiuquan City, Gansu Province as an example. Based on the theory of structural calculation and ANSYS software, Q235 steel is used in the two kinds of greenhouse skeleton, and the arch bar of steel arch frame is DN25 galvanized steel pipe with a wall thickness of 3.25mm. The upper chord of the steel truss is DN25 galvanized steel pipe with a wall thickness of 3.25mm, the lower chord is 蠁 12 round steel, and the web bar is 蠁 10 round steel. The structure span of greenhouse is 8 m, ridge height is 4 m, skeleton spacing is 1.0 m; The front roof is a two-fold structure, that is, the front part is an arched structure with an arc length of about 5m, the rear part is a straight rod with a length of about 3m, the roof angle is 66 掳and the angle between the straight rod and the horizontal plane is 15 掳. The elevation angle of the rear roof is 45 掳. [results] under two working conditions of load (working condition 1: dead load: live load concentrated snow load on roof; Working condition 2: dead load use live load roof concentrated live load wind load, the actual maximum stress of the steel arch structure stress weak part is more than the material strength design stress value 215 MPa. Many parts of the skeleton are not safe, so the steel arch frame has safety hidden trouble. The stress at all sections of the steel truss frame is less than the strength design stress of the material, and the structure is safe to use. [conclusion] the solar greenhouse of the steel truss structure is suitable for extensive application.
【作者单位】：甘肃农业大学园艺学院;
【基金】：农业部公益性行业(农业)专项(201203002)
【分类号】：TU391
【正文快照】： 日光温室是由中国农业科技工作者与农民群众共同创造的、具有中国特色的农业设施[1],其结构简易、投入少,在中国北方地区的严寒季节不用其他加热设施,仅依靠太阳能就能实现喜温性、甚至耐热性作物的生产[2],是世界一大奇迹.目前,全国日光温室已达到69.66万hm2以上,其中甘肃省

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