南京长江大桥铰轴滑板支座和辊轴支座使用性能研究

发布时间：2018-06-14 17:18

本文选题：南京长江大桥 + 钢桁梁　；参考：《铁道标准设计》2017年01期

【摘要】：通过剖析3跨连续梁远端支座位移产生缘由并结合南京长江大桥测试结果,给出计算三跨及多跨连续梁结构远端支座位移结构校验系数的相对位移法。通过南京长江大桥正桥4号墩铰轴滑板支座和7号墩辊轴支座的实测位移量对比分析可知:在相同自重或列车荷载作用下,铰轴滑板支座产生的水平摩阻力较辊轴支座大;铁路客车产生的支座水平推力不足以克服铰轴滑板支座的最大静摩阻力,支座基本不动;当桥上列车荷载产生的支座水平力足以克服铰轴滑板支座的最大静摩阻力时,铰轴滑板支座产生移动,但因其水平摩阻力大于辊轴支座,所以其位移量小于辊轴支座,两者位移量随桥上列车荷载的增加而增加,但两者差值基本保持稳定。
[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.
【作者单位】：上海铁路局工务处;
【分类号】：U443.36

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