高墩水平温差对连续刚构桥上无缝线路的影响

发布时间：2018-04-03 02:20

本文选题：铁路桥　切入点：高墩　出处：《铁道标准设计》2014年11期

【摘要】：为研究高墩水平温差对桥上无缝线路的影响,选取某高墩大跨连续刚构桥工程实例,基于梁轨相互作用原理,建立线桥墩一体化有限元模型,分析在水平纵向和横向温差作用下高墩大跨桥上无缝线路受力变形情况。结果表明:高墩纵向温差对连续刚构桥上无缝线路纵向受力影响较大,随着桥墩纵向温差的增大,桥上无缝线路受力逐渐增大;桥墩横向温差影响桥上无缝线路平顺性,当桥墩横向温差超过一定的限值时,连续刚构桥上无缝线路会出现长波不平顺超限;总结以上分析结果,建议在连续刚构桥上无缝线路设计检算中考虑高墩在水平温差作用下对桥上无缝线路的影响。
[Abstract]:In order to study the influence of the horizontal temperature difference of high piers on the jointless track on the bridge, an example of a large span continuous rigid frame bridge with high pier is selected. Based on the principle of beam-rail interaction, an integrated finite element model of line pier is established.The stress and deformation of jointless track on long span bridge with high piers under the action of horizontal longitudinal and transverse temperature difference are analyzed.The results show that the longitudinal temperature difference of high piers has a great influence on the longitudinal stress of CWR on continuous rigid frame bridge. With the increase of longitudinal temperature difference of piers, the stress of CWR on the bridge increases gradually, and the lateral temperature difference of piers affects the ride comfort of CWR on the continuous rigid frame bridge.When the transverse temperature difference of piers exceeds a certain limit, there will be long wave irregularity over the CWR on continuous rigid frame bridges.It is suggested that the influence of high piers on the CWR on the bridge under the action of horizontal temperature difference should be considered in the design and calculation of CWR on continuous rigid frame bridge.
【作者单位】：中铁第五勘察设计院集团有限公司;西南交通大学高速铁路线路工程教育部重点实验室;
【分类号】：U448.23;U213.9

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