【摘要】：以中央開槽箱梁斷面斜拉橋-上海長江大橋?yàn)楣こ瘫尘?首先通過格柵紊流場節(jié)段模型測力和測壓風(fēng)洞試驗(yàn),研究了中央開槽箱梁斷面的非定常隨機(jī)抖振力頻譜特性和跨向相關(guān)特性;然后,借助于最小二乘擬合方法,提出了同時(shí)考慮來流紊流和特征紊流的中央開槽箱梁斷面的非定常隨機(jī)抖振力譜經(jīng)驗(yàn)數(shù)學(xué)模型和抖振力跨向根方相干函數(shù)經(jīng)驗(yàn)數(shù)學(xué)模型;其次在此基礎(chǔ)上,建立了開槽斷面斜拉橋的非定常隨機(jī)抖振響應(yīng)有限元頻域數(shù)值分析方法,并應(yīng)用于上海長江大橋的非定常隨機(jī)抖振響應(yīng)分析;最后,把數(shù)值分析結(jié)果與氣彈模型風(fēng)洞試驗(yàn)結(jié)果進(jìn)行了對比,以檢驗(yàn)所建立方法的可行性和可靠性。
[Abstract]:Based on the cable-stayed bridge with central slotted box girder section and Shanghai Yangtze River Bridge as the engineering background, the wind tunnel test of force and pressure is first carried out through the model of grid turbulent flow field. The spectrum characteristics of unsteady random buffeting force and the cross-correlation characteristics of the central slotted box girder section are studied. Then, by means of the least square fitting method, an empirical mathematical model of unsteady random buffeting force spectrum and an empirical mathematical model of cross-root coherent function of buffeting force are proposed for the central slotted box girder section considering both the incoming turbulent flow and the characteristic turbulence. Secondly, the finite element numerical analysis method of unsteady random buffeting response of cable-stayed bridge with slotted section in frequency domain is established and applied to the unsteady random buffeting response analysis of Shanghai Yangtze River Bridge. Finally, the results of numerical analysis are compared with the results of wind tunnel test of Aeroelastic model to verify the feasibility and reliability of the established method.
【作者單位】： 汕頭大學(xué);同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室;橋梁結(jié)構(gòu)抗風(fēng)技術(shù)交通行業(yè)重點(diǎn)實(shí)驗(yàn)室;天津市市政工程設(shè)計(jì)研究院;
【基金】：國家自然科學(xué)基金(51308330) 橋梁結(jié)構(gòu)抗風(fēng)技術(shù)交通行業(yè)重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(KLWRTBMC12-01) 科技部國家重點(diǎn)實(shí)驗(yàn)室基金資助系統(tǒng)性項(xiàng)目(SLDRCE08-A-02) 汕頭大學(xué)科研啟動項(xiàng)目(NTF12007)
【分類號】：U441.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 文水兵;朱樂東;丁泉順;;扁平雙邊肋主梁橋梁斷面抖振力及氣動導(dǎo)納頻譜特性研究[J];結(jié)構(gòu)工程師;2008年03期

相關(guān)會議論文 前1條

1 文水兵;朱樂東;丁泉順;;雙邊肋主梁斷面隨機(jī)抖振力頻譜特性研究[A];第十三屆全國結(jié)構(gòu)風(fēng)工程學(xué)術(shù)會議論文集（中冊）[C];2007年

，

本文編號：2301876