下?lián)舯┝髯饔孟螺旊婅F塔荷載取值及承載性能分析
發(fā)布時(shí)間：2018-06-17 23:01
本文選題：下?lián)舯┝?/strong> + 風(fēng)速剖面��； 參考：《中國電機(jī)工程學(xué)報(bào)》2014年24期
【摘要】：下?lián)舯┝鲿?huì)給輸電線路造成巨大危害,已引發(fā)生多起倒塔事故�；贏SCE關(guān)于高強(qiáng)度風(fēng)區(qū)域輸電線路設(shè)計(jì)的相關(guān)規(guī)定,綜合考慮下?lián)舯┝鞒叨忍卣骱洼旊娋�路經(jīng)濟(jì)性設(shè)計(jì)原則,提出了下?lián)舯┝髯饔孟螺旊娋�路的設(shè)計(jì)荷載取值建議。采用Vicroy風(fēng)速剖面模型,計(jì)算得到了內(nèi)陸和沿海地區(qū)典型輸電鐵塔在下?lián)舯┝髯饔孟碌娘L(fēng)荷載。建立了輸電鐵塔空間有限元分析模型,通過結(jié)構(gòu)受力分析,確定了輸電鐵塔在下?lián)舯┝髯饔孟碌氖芰μ卣骱推茐哪Ｊ健＝Y(jié)果表明:下?lián)舯┝髯饔孟?輸電鐵塔桿件應(yīng)力主要由45°大風(fēng)控制。對于設(shè)計(jì)風(fēng)速較低的內(nèi)陸地區(qū),盡管鐵塔結(jié)構(gòu)高度不在下?lián)舯┝髯罡唢L(fēng)速區(qū)域,下?lián)舯┝黠L(fēng)荷載明顯高于常規(guī)風(fēng),塔腿橫隔面以上主材會(huì)首先發(fā)生破壞;對于設(shè)計(jì)風(fēng)速較高的沿海地區(qū),下?lián)舯┝黠L(fēng)荷載低于常規(guī)風(fēng),下?lián)舯┝髟阼F塔設(shè)計(jì)中不起控制作用。
[Abstract]:The downburst will cause great harm to the transmission line, which has caused many tower accidents. Based on the relevant provisions of ASCE on the design of transmission lines in high intensity wind regions and considering the scale characteristics of downburst flow and the economic design principles of transmission lines, suggestions on the design load values of transmission lines under the action of downburst currents are put forward. The wind load of typical transmission towers in inland and coastal areas under the action of downburst current is calculated by using the wind profile model of Vicroy. The spatial finite element analysis model of transmission tower is established, and the stress characteristics and failure mode of transmission tower under the action of downburst current are determined through structural stress analysis. The results show that the stress of transmission tower member is controlled by 45 擄wind. For the inland area with lower design wind speed, although the height of the tower structure is not in the maximum wind speed area, the downburst wind load is obviously higher than that of the conventional wind, and the main material above the cross plane of the tower leg will be destroyed first. For coastal areas with high design wind speed, the downburst wind load is lower than that of conventional wind, and the downburst flow does not play a controlling role in the design of iron tower.
【作者單位】： 中國電力科學(xué)研究院;江蘇省電力公司電力科學(xué)研究院;
【分類號】：TM753
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1 王亮;輸電塔結(jié)構(gòu)風(fēng)致倒塔分析[D];武漢理工大學(xué);2011年
，本文編號：2032828
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