發(fā)布時間：2018-08-30 10:14

【摘要】：目前,國家電網(wǎng)公司正在積極推進(jìn)“一特四大”的電網(wǎng)發(fā)展戰(zhàn)略,即以大型能源基地為依托,著力發(fā)展特高壓電網(wǎng),實現(xiàn)大型煤電、水電、核電、再生能源的集約化開發(fā),優(yōu)化全國范圍內(nèi)的資源配置。而大型抽水蓄能電站作為電力系統(tǒng)中經(jīng)濟(jì)、可靠、容量大、壽命周期長、技術(shù)成熟的儲能裝置,在電力系統(tǒng)特別是智能電網(wǎng)的穩(wěn)定安全運行起著關(guān)鍵性作用。 抽水蓄能電站為了完成其抽水—發(fā)電循環(huán),通常有兩個水庫,稱為上水庫和下水庫,而且上水庫多建在山頂,筑壩處的溝口較開闊,地質(zhì)條件一般較差。面板堆石壩具有施工機(jī)械化程度高、工期短、投資省以及對地形地質(zhì)條件的適應(yīng)能力強等優(yōu)點,因此是抽水蓄能電站優(yōu)先選擇的壩型。 在“5.12汶川地震”后,大壩的抗震安全備受關(guān)注。面板堆石壩由松散顆粒集合體填筑而成,在地震作用下,面板結(jié)構(gòu)可能發(fā)生擠壓、錯臺與脫空,堆石結(jié)構(gòu)也可能發(fā)生坍塌、震陷等破壞,從而影響面板堆石壩的抗震安全。因此大壩抗震評價即成為面板堆石壩設(shè)計的重要內(nèi)容。目前,基于性能的抗震設(shè)計在土木工程領(lǐng)域中已取得長足發(fā)展。而基于性能抗震設(shè)計的前提是準(zhǔn)確預(yù)估地震作用下的永久變形。 本文針對陜西鎮(zhèn)安抽水蓄能電站的下庫面板堆石壩,進(jìn)行了三維有限元靜、動力分析。靜、動力本構(gòu)模型分別采用鄧肯E-B模型和等效線性-粘彈性模型,采用南科院測得的堆石料動應(yīng)力與殘余應(yīng)變關(guān)系曲線,利用等效結(jié)點力法進(jìn)行了面板堆石壩的地震永久變形分析。 其次,討論了在不同的最大動剪模量以及在不同的動剪模量比衰減曲線和阻尼比增長曲線選取下壩體的動力響應(yīng),研究了這些動參數(shù)變化對地震永久變形的特征值以及分布規(guī)律的影響,得出動參數(shù)變化下地震永久變形的變化規(guī)律。
[Abstract]:At present, the State Grid Company is actively promoting the development strategy of the "one, four" power grid, that is, relying on a large energy base, focusing on the development of ultra-high voltage power grids, and realizing intensive development of large-scale coal, hydropower, nuclear and renewable energy sources. Optimize the allocation of resources nationwide. As an economical, reliable, large capacity, long life cycle and mature technology, the large pumped storage power station plays a key role in the stable and safe operation of the power system, especially the smart grid. In order to complete its pumped-generation cycle, there are usually two reservoirs, upper reservoir and lower reservoir. Moreover, the upper reservoir is built on the top of the mountain, the gully in the dam is open, and the geological conditions are generally poor. Face rockfill dam has the advantages of high construction mechanization, short construction period, low investment and strong adaptability to topographic and geological conditions, so it is the preferred dam type for pumped storage power stations. After the 5. 12 Wenchuan earthquake, the seismic safety of the dam has attracted much attention. The concrete face rockfill dam is constructed by the loose grain aggregate. Under the action of earthquake, the face slab structure may be squeezed, staggered and emptied, and the rockfill structure may collapse and collapse, thus affecting the seismic safety of the face rockfill dam. Therefore, seismic evaluation of dam becomes an important content in the design of face rockfill dam. At present, performance-based seismic design has made great progress in the field of civil engineering. The premise of performance-based seismic design is to accurately predict the permanent deformation under earthquake action. In this paper, the static and dynamic analysis of three dimensional finite element method is carried out for the concrete face rockfill dam of Zhenan pumped storage power station in Shaanxi province. The static and dynamic constitutive models are respectively based on Duncan E-B model and equivalent linearly viscoelastic model, and the curves of dynamic stress and residual strain of rockfill are used. The seismic permanent deformation of face rockfill dam is analyzed by using the equivalent node force method. Secondly, the dynamic response of the dam is discussed under the different maximum dynamic shear modulus and the different damping ratio growth curve and the attenuation curve of the dynamic shear modulus ratio. The influence of these dynamic parameters on the characteristic value and distribution of earthquake permanent deformation is studied. The variation law of earthquake permanent deformation under the change of dynamic parameters is obtained.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV641.43;TV312

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王楠;;我國抽水蓄能電站發(fā)展現(xiàn)狀與前景分析[J];電力技術(shù)經(jīng)濟(jì);2008年02期

2 林皋;;汶川大地震中大壩震害與大壩抗震安全性分析[J];大連理工大學(xué)學(xué)報;2009年05期

3 欒茂田,吳興征,陰吉英,辛軍霞;堆石料動力特性參數(shù)對面板堆石壩三維非線性地震響應(yīng)的影響[J];水力發(fā)電學(xué)報;2001年01期

4 孔憲京;周揚;鄒德高;徐斌;;高面板堆石壩面板應(yīng)力分析及抗擠壓破壞措施[J];水力發(fā)電學(xué)報;2011年06期

5 劉君;劉博;孔憲京;;地震作用下土石壩壩頂沉降估算[J];水力發(fā)電學(xué)報;2012年02期

6 遲世春,林皋,孔憲京;堆石料殘余體應(yīng)變對計算面板堆石壩永久變形的影響[J];水力發(fā)電學(xué)報;1998年01期

7 遲世春;不同地震輸入對混凝土面板堆石壩動力反應(yīng)的影響[J];世界地震工程;2002年02期

8 周建為;;抽水蓄能電站的效益分析[J];水力發(fā)電;2008年02期

9 趙劍明;劉小生;溫彥鋒;陳寧;劉啟旺;;紫坪鋪大壩汶川地震震害分析及高土石壩抗震減災(zāi)研究設(shè)想[J];水力發(fā)電;2009年05期

10 章為民;陳生水;;紫坪鋪面板堆石壩汶川地震永久變形實測結(jié)果分析[J];水力發(fā)電;2010年08期

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本文編號：2212765