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大跨度铁路箱型混合梁斜拉桥钢轨伸缩调节器的设置研究

发表时间:2015-07-31  浏览量:1310  下载量:512
全部作者: 张莹,马坤全
作者单位: 中铁上海设计院集团有限公司;同济大学土木工程学院
摘 要: 基于梁轨相互作用原理,以某新建大跨度铁路箱型混合梁斜拉桥为工程背景,建立“塔-索-梁-轨”空间有限元计算模型,对桥上钢轨伸缩调节器的合理设置进行了分析研究。首先介绍了计算采用的模型和设计参数,然后分析了钢轨伸缩调节器对钢轨纵向附加力和位移的影响,最后得出结论:跨中设置钢轨伸缩调节器对钢轨附加力影响很小,实际工程中不应考虑在主桥一端设置伸缩调节器的方案;两端设置伸缩调节器可有效降低钢轨纵向附加力和梁轨纵向相对位移。
关 键 词: 铁路运输;钢轨伸缩调节器;梁轨相互作用;纵向附加力
Title: Rail expansion joint settings on long-span railway box hybrid girder cable-stayed bridge
Author: ZHANG Ying, MA Kunquan
Organization: China Railway Shanghai Design Institute Group Co. Ltd.; College of Civil Engineering, Tongji University
Abstract: Based on the principle of interaction between beam and rail and by taking a new long-span railway box hybrid girder cable-stayed bridge as the engineering background, the space finite element calculation model of tower-cable-beam-rail is established for researching the reasonable settings of rail expansion joint. Firstly, the model and related parameters are introduced. Then, the influence of rail expansion joint on additional longitudinal force and displacement is analyzed. Finally, we conclude that setting rail expansion joint at mid-span has little impact on additional longitudinal force. Setting rail expansion joint at one end of the bridge should not be considered in the practical engineering. Setting rail expansion joint at both ends of the bridge can effectively reduce rail additional longitudinal forces and the relative longitudinal displacement between rail and beam.
Key words: railway transport; rail expansion joint; rail-bridge interaction; additional longitudinal force
发表期数: 2015年7月第14期
引用格式: 张莹,马坤全. 大跨度铁路箱型混合梁斜拉桥钢轨伸缩调节器的设置研究[J]. 中国科技论文在线精品论文,2015,8(14):1516-1523.
 
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