本文選題：南京長(zhǎng)江大橋 + 鋼桁梁　； 參考：《鐵道標(biāo)準(zhǔn)設(shè)計(jì)》2017年01期

【摘要】：通過(guò)剖析3跨連續(xù)梁遠(yuǎn)端支座位移產(chǎn)生緣由并結(jié)合南京長(zhǎng)江大橋測(cè)試結(jié)果,給出計(jì)算三跨及多跨連續(xù)梁結(jié)構(gòu)遠(yuǎn)端支座位移結(jié)構(gòu)校驗(yàn)系數(shù)的相對(duì)位移法。通過(guò)南京長(zhǎng)江大橋正橋4號(hào)墩鉸軸滑板支座和7號(hào)墩輥軸支座的實(shí)測(cè)位移量對(duì)比分析可知:在相同自重或列車荷載作用下,鉸軸滑板支座產(chǎn)生的水平摩阻力較輥軸支座大;鐵路客車產(chǎn)生的支座水平推力不足以克服鉸軸滑板支座的最大靜摩阻力,支座基本不動(dòng);當(dāng)橋上列車荷載產(chǎn)生的支座水平力足以克服鉸軸滑板支座的最大靜摩阻力時(shí),鉸軸滑板支座產(chǎn)生移動(dòng),但因其水平摩阻力大于輥軸支座,所以其位移量小于輥軸支座,兩者位移量隨橋上列車荷載的增加而增加,但兩者差值基本保持穩(wěn)定。
[Abstract]:Based on the analysis of the causes of the displacement of the distal support of the 3-span continuous beam and the test results of the Nanjing Yangtze River Bridge, the relative displacement method for calculating the checking coefficients of the displacement of the distal support of the three-span and multi-span continuous beam structures is presented. Through the comparison and analysis of the measured displacement between the pivot slide bearing of No. 4 pier of Nanjing Yangtze River Bridge and the roller shaft support of No. 7 pier, it can be seen that under the action of the same deadweight or train load, the horizontal frictional resistance of the hinged slide bearing is greater than that of the roller bearing; The horizontal thrust generated by railway passenger cars is not enough to overcome the maximum static and frictional resistance of the hinged slide bearing, and the support is basically stationary; when the horizontal force of the bearing caused by the train load on the bridge is sufficient to overcome the maximum static and frictional resistance of the hinged slide bearing, But the horizontal friction resistance is larger than the roller bearing, so the displacement is smaller than the roller bearing. The displacement increases with the increase of the train load on the bridge, but the difference between the two is basically stable.
【作者單位】： 上海鐵路局工務(wù)處;
【分類號(hào)】：U443.36

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本文編號(hào)：2018320