高墩大跨桥梁桥墩升温对桥上无缝线路的影响研究

发布时间：2018-07-09 11:02

  本文选题：高墩大跨桥梁 + 桥墩升温　； 参考：《铁道标准设计》2014年09期

【摘要】：高墩大跨桥梁桥墩整体在太阳辐射下升温,会使桥墩顶部产生竖向位移。对桥墩升温产生竖向位移对无缝线路的影响这一问题,使用有限元软件建立线-桥-墩一体化模型,分析高墩升温条件下桥上无缝线路的受力及变形。计算结果表明:桥墩的升温对桥墩受力影响较小,桥墩温度变化引起的线路竖向不平顺主要是长波不平顺。建议高墩大跨桥梁不考虑桥墩整体温度变化对线路受力的影响,但要对桥墩变形引起的竖向不平顺进行检算,以满足规范对桥上无缝线路验收的需要。
[Abstract]:The whole piers of long span bridges with high piers are heated by solar radiation, which will cause vertical displacement at the top of the piers. In order to solve the problem of the influence of vertical displacement on the CWR caused by the temperature rise of the piers, the finite element software is used to establish the integrated model of line-bridge-pier, and to analyze the stress and deformation of the CWR on the bridge under the condition of high pier heating. The results show that the temperature rise of the piers has little effect on the stress of the piers, and the vertical irregularity caused by the temperature change of the piers is mainly the long-wave irregularity. It is suggested that long span bridges with high piers should not take into account the influence of the temperature variation of piers on the load of the bridge, but the vertical irregularity caused by the deformation of the piers should be checked to meet the requirements of the code for acceptance of the jointless track on the bridge.
【作者单位】： 西南交通大学高速铁路线路工程教育部重点实验室;西南交通大学土木工程学院;
【分类号】：U448.13;U213.9
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本文编号：2109147