【摘要】：當(dāng)大跨度橋梁面臨顫振威脅時(shí),合理有效的被動(dòng)氣動(dòng)控制方法是避免其在服役期內(nèi)發(fā)生風(fēng)毀的最好保障.研究了適用于閉口箱梁等3種大跨度橋梁常用主梁的多種被動(dòng)氣動(dòng)顫振控制方法.結(jié)果表明,中央開槽適合于提高氣動(dòng)穩(wěn)定性能較好的閉口箱梁的顫振性能,風(fēng)嘴則能顯著提升氣動(dòng)外形鈍化的開口邊主梁的顫振臨界風(fēng)速,而中央穩(wěn)定板幾乎適合于各種主梁形式.此外,對(duì)檢查車軌道等附屬裝置進(jìn)行局部調(diào)位也可以起到良好的顫振控制效果,而多種控制方法的合理組合可以進(jìn)一步發(fā)揮其控制作用.氣動(dòng)控制措施的效果與其設(shè)置參數(shù)緊密相關(guān),針對(duì)各種控制方法的合理參數(shù)設(shè)置進(jìn)行了研究和優(yōu)化.
[Abstract]:When the long-span bridge is threatened by flutter, a reasonable and effective passive pneumatic control method is the best guarantee to avoid wind damage during the service period. A variety of passive pneumatic flutter control methods for three kinds of long-span bridges, such as closed box girder, are studied. The results show that the central slotting is suitable for improving the flutter performance of the closed box girder with good pneumatic stability, while the nozzle can significantly increase the flutter critical wind speed of the open side main beam with passivated pneumatic shape. The central stabilizer plate is almost suitable for all kinds of main beam forms. In addition, the local adjustment of vehicle tracks and other ancillary devices can also play a good flutter control effect, and the reasonable combination of various control methods can further play its control role. The effect of pneumatic control measures is closely related to its setting parameters. The reasonable parameter settings of various control methods are studied and optimized.
【作者單位】： 同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51078276) 國家重點(diǎn)實(shí)驗(yàn)室自主課題(SLDRCE10-B-05) 國家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2013CB036300)
【分類號(hào)】：U441.3

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