本文關(guān)鍵詞：臺風作用下網(wǎng)殼結(jié)構(gòu)動力失效研究　出處：《浙江大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 臺風 網(wǎng)殼結(jié)構(gòu) 數(shù)值模擬 諧波合成 時程分析 動力失效

【摘要】：大跨空間結(jié)構(gòu)多用于體育場館、交通建筑、會展中心等大型公共建筑,這類結(jié)構(gòu)的重要性不言而喻,一旦破壞或失效會給社會生產(chǎn)和人民生命安全帶來重大損失,同時也會造成較壞的社會影響。我國每年都會遭受臺風襲擊,大跨度結(jié)構(gòu)在風振作用下破壞的案例時有發(fā)生。因此研究大跨度結(jié)構(gòu)在臺風作用下的動力失效具有重要意義。本文基于Yan Meng臺風模型,確定了影響臺風風場的關(guān)鍵參數(shù),根據(jù)1949-2014年間西北太平洋熱帶氣旋實測數(shù)據(jù),用模擬圓法分析了臺風關(guān)鍵參數(shù)的最優(yōu)概率模型。依據(jù)臺風關(guān)鍵參數(shù)的最優(yōu)概率模型,用隨機抽樣法隨機抽取了10000組臺風,與實測熱帶氣旋極值風速進行擬合,得到臺風平均風剖面指數(shù)。用FLUENT軟件數(shù)值模擬了常規(guī)風場和臺風風場下球面網(wǎng)殼和頂部開口網(wǎng)殼表面風壓特性。表明球面網(wǎng)殼在常規(guī)風場和臺風風場下風壓規(guī)律相似,但臺風風場下網(wǎng)殼表面的風壓系數(shù)要大于常規(guī)風場下的風壓系數(shù)。矢跨比為1/8時,兩類風場屋蓋表面風壓以負壓為主,負壓最大值出現(xiàn)在橫風向邊緣附近,在垂直風運動方向,網(wǎng)殼邊緣的風壓系數(shù)要大于中間區(qū)域的風壓系數(shù)。分別依據(jù)Davenport譜和Von Karman譜,采用諧波合成法,用MATLAB模擬了球面網(wǎng)殼結(jié)構(gòu)在常規(guī)風場和臺風風場下表面各點的風速時程,并與目標譜進行了對比,驗證了常規(guī)風場和臺風風場各自風速譜的正確性。對比了常規(guī)風場和臺風風場下網(wǎng)殼結(jié)構(gòu)和弦支網(wǎng)殼結(jié)構(gòu)的動力效應(yīng),得出相對于常規(guī)風場,臺風風場作用下網(wǎng)殼和弦支網(wǎng)殼結(jié)構(gòu)的位移響應(yīng)和均方差更大,且在臺風作用下,弦支網(wǎng)殼結(jié)構(gòu)的最大位移出現(xiàn)在與內(nèi)環(huán)撐桿連接的上部網(wǎng)殼節(jié)點處。以最大位移和塑性桿件比例為指標提出了臺風作用下網(wǎng)殼結(jié)構(gòu)動力失效判定準則；以節(jié)點最大位移、塑性桿件比例和索是否松弛為指標提出了臺風作用下弦支網(wǎng)殼結(jié)構(gòu)動力失效判定準則。并通過算例驗證了該判定準則的適用性。
[Abstract]:Large span space structures are used in large public buildings such as stadiums, traffic buildings, convention and exhibition centers, etc. The importance of such structures is self-evident. Once the damage or failure will bring great loss to social production and people's life and safety, it will also cause a bad social impact. China will be hit by typhoons every year. There are some cases of long-span structures damaged under wind-induced vibration. Therefore, it is important to study the dynamic failure of long-span structures under typhoon. This paper is based on Yan Meng typhoon model. The key parameters affecting typhoon wind field are determined, and the measured data of tropical cyclones in the Northwest Pacific Ocean from 1949 to 2014 are analyzed. According to the optimal probability model of typhoon key parameters, 10000 groups of typhoons were randomly selected by random sampling method. Fitting with the measured extreme wind speed of tropical cyclone. The mean wind profile index of typhoon is obtained. The surface pressure characteristics of spherical latticed shell and open top latticed shell under conventional wind field and typhoon wind field are numerically simulated by FLUENT software. It is shown that spherical reticulated shell is in conventional wind field and typhoon wind field. The law of downwind pressure is similar. However, the wind pressure coefficient of the reticulated shell surface under typhoon wind field is larger than that under the conventional wind field. When the rise-span ratio is 1/8, the negative pressure on the roof surface of the two kinds of wind field is mainly negative pressure, and the maximum negative pressure appears near the edge of the cross wind direction. In the vertical direction of wind motion, the wind pressure coefficient at the edge of the reticulated shell is larger than that in the middle region. According to the Davenport spectrum and the Von Karman spectrum, the harmonic synthesis method is adopted. The wind time history of spherical reticulated shell structure under conventional wind field and typhoon wind field is simulated by MATLAB and compared with the target spectrum. The validity of wind speed spectrum of conventional wind field and typhoon wind field is verified. The dynamic effects of reticulated shell structure and chord branch latticed shell structure under conventional wind field and typhoon wind field are compared and compared with conventional wind field. The displacement response and mean square deviation of the latticed shell and chord branch latticed shell structure under typhoon wind field are larger than those of typhoon. The maximum displacement of chord supported latticed shell structure appears at the upper reticulated shell node connected with inner ring bracing rod. The criterion for determining dynamic failure of latticed shell structure under typhoon action is proposed based on the maximum displacement and plastic member ratio. A criterion for determining the dynamic failure of chord latticed shell structures under typhoon action is presented based on the maximum displacement of nodes, the proportion of plastic members and the relaxation of cables. The applicability of the criterion is verified by an example.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU399

【參考文獻】

相關(guān)期刊論文 前10條

1 黃鵬;夏波文;顧明;;臺風“浣熊”影響下近地風特性及低矮房屋屋面風壓實測研究[J];土木工程學(xué)報;2015年S1期

2 劉樹堂;;弦支穹頂結(jié)構(gòu)參數(shù)優(yōu)化設(shè)計研究[J];深圳大學(xué)學(xué)報(理工版);2013年06期

3 楊波;林祥;劉青明;封勇;;“桑美”超強臺風風暴潮增水特征分析[J];河海大學(xué)學(xué)報(自然科學(xué)版);2013年04期

4 劉慧娟;楊綠峰;羅永峰;;基于雙控法弦支穹頂伺服施工過程非線性分析[J];華中科技大學(xué)學(xué)報(自然科學(xué)版);2012年03期

5 羅堯治;蔡朋程;孫斌;童若飛;沈雁彬;王洽親;;國家體育場大跨度屋蓋結(jié)構(gòu)風場實測研究[J];振動與沖擊;2012年03期

6 陳東;王修信;徐趙東;;雙層球面網(wǎng)殼動力失效分析及地震損失評估[J];地震工程與工程振動;2012年01期

7 樓文娟;蔣瑩;薛曉勇;陳文龍;沈國輝;;臺風風場作用下體育場罩棚風壓分布風洞試驗研究[J];建筑結(jié)構(gòu)學(xué)報;2012年01期

8 傅余萍;劉玉樹;張駿;;大跨度屋蓋圍護結(jié)構(gòu)的施工措施探討——對某體育館屋面破壞的施工構(gòu)造分析[J];工程建設(shè)與設(shè)計;2010年11期

9 賈曉;路川藤;盧堅;周正萍;;中國沿海臺風的統(tǒng)計特征及臺風浪的數(shù)值模擬[J];水道港口;2010年05期

10 石開榮;郭正興;羅斌;;橢圓形弦支穹頂結(jié)構(gòu)的預(yù)應(yīng)力確定方法研究[J];土木工程學(xué)報;2010年09期

相關(guān)會議論文 前4條

1 邵德民;端義宏;張維;;上海地區(qū)大風風速剖面特性的觀測和分析[A];第十一屆全國結(jié)構(gòu)風工程學(xué)術(shù)會議論文集[C];2004年

2 陳伏彬;李秋勝;李正農(nóng);吳玖榮;傅繼陽;郅倫海;;廣州國際會展中心鋼屋蓋現(xiàn)場實測研究[A];第十三屆全國結(jié)構(gòu)風工程學(xué)術(shù)會議論文集（上冊）[C];2007年

3 方平治;趙兵科;邵德民;顧明;;“圣帕”臺風登陸前后的近地風場特征[A];第十四屆全國結(jié)構(gòu)風工程學(xué)術(shù)會議論文集（上冊）[C];2009年

4 沈世釗;武岳;;大跨空間結(jié)構(gòu)抗風研究現(xiàn)狀與展望[A];中國結(jié)構(gòu)風工程研究30周年紀念大會論文集[C];2010年

相關(guān)碩士學(xué)位論文 前3條

1 王璐璐;臺風作用下跨海斜拉橋的失效機理[D];浙江大學(xué);2014年

2 李瑞龍;基于改進的臺風關(guān)鍵參數(shù)的臺風極值風速預(yù)測[D];哈爾濱工業(yè)大學(xué);2007年

3 孫景亞;大跨度屋蓋結(jié)構(gòu)風振動力響應(yīng)分析[D];重慶大學(xué);2007年

，

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