發(fā)布時(shí)間：2018-05-24 10:26

  本文選題：輸電線(xiàn) + 風(fēng)荷載　； 參考：《中國(guó)電機(jī)工程學(xué)報(bào)》2014年36期

【摘要】：中國(guó)時(shí)有輸電線(xiàn)路的風(fēng)災(zāi)破壞事故發(fā)生。作為一種典型的風(fēng)振敏感結(jié)構(gòu),作用于桿塔結(jié)構(gòu)上的輸電線(xiàn)風(fēng)荷載往往是線(xiàn)路設(shè)計(jì)中的控制荷載。從結(jié)構(gòu)風(fēng)工程原理出發(fā),對(duì)中英美三國(guó)典型線(xiàn)路風(fēng)荷載規(guī)范的理論基礎(chǔ)、計(jì)算方法及取值原則做深入解析和比較,全面考察基本風(fēng)速、風(fēng)剖面、紊流度、空間相關(guān)性、隨機(jī)脈動(dòng)效應(yīng)、檔距及高度等因素對(duì)輸電線(xiàn)風(fēng)荷載計(jì)算的影響,逐步揭示了規(guī)范荷載差異的實(shí)質(zhì)原因及分布規(guī)律。結(jié)合工程實(shí)例的計(jì)算比較,提出了在中國(guó)規(guī)范中優(yōu)化平均風(fēng)荷載計(jì)算參數(shù),合理考慮風(fēng)荷載空間相關(guān)性和紊流特性等主要脈動(dòng)風(fēng)動(dòng)力效應(yīng)因素的建議,為提高線(xiàn)路抗風(fēng)設(shè)計(jì)的可靠性以及規(guī)范修訂提供了一些客觀(guān)參考。
[Abstract]:In China, there are wind disasters and damage accidents of transmission lines from time to time. As a typical wind-induced vibro-sensitive structure, the wind load of transmission line acting on the tower structure is often the control load in the design of the transmission line. Based on the principle of structural wind engineering, the theoretical basis, calculation method and value principle of wind load code for typical lines in China and the United States are analyzed and compared in depth, and the basic wind speed, wind profile, turbulence, spatial correlation are comprehensively investigated. The influence of random pulsation effect, spacing and height on wind load calculation of transmission line has gradually revealed the essential reason and distribution law of the difference of code load. Based on the calculation and comparison of engineering examples, this paper puts forward some suggestions for optimizing the calculation parameters of mean wind load in Chinese code, considering reasonably the spatial correlation of wind load and turbulence characteristics, and other main factors of pulsating wind dynamic effect. It provides some objective reference for improving the reliability of wind resistance design and revising the code.
【作者單位】： 武漢理工大學(xué)土木工程系;中南電力設(shè)計(jì)院;武漢大學(xué)風(fēng)工程研究中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51478373)~~
【分類(lèi)號(hào)】：TU312.1

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本文編號(hào)：1928720