高速铁路大跨度混凝土拱桥变形控制限值

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英文篇名：Deformation Control Limits for Long-Span Concrete Arch Bridge of High-Speed Railway 作者：郑晓龙 ; 徐昕宇 ; 陈克坚 ; 游励晖 英文作者：ZHENG Xiaolong;XU Xinyu;CHEN Kejian;YOU Lihui;China Railway Eryuan Engineering Group Co., Ltd.; 关键词：高速铁路 ; 大跨拱桥 ; 车桥耦合振动 ; 温度 ; 徐变 ; 变形控制 ; 长波不平顺 英文关键词：High-speed railway;;Long-span arch bridge;;Vehicle-bridge coupling vibration;;Temperature;;Creep;;Deformation control;;Long wave irregularity 中文刊名：ZGTK 英文刊名：China Railway Science 机构：中铁二院工程集团有限责任公司; 出版日期：2019-05-15 出版单位：中国铁道科学 年：2019 期：v.40;No.166 基金：国家重点研发计划项目(2017YFB1201204) 语种：中文; 页：ZGTK201903010 页数：5 CN：03 ISSN：11-2480/U 分类号：62-66

摘要

以某大跨度上承式混凝土拱桥为研究对象,通过车桥耦合分析方法,分析温度和徐变共同作用下的车桥系统动力响应,研究桥梁变形的控制指标和限值。结果表明:在温度和原始徐变共同作用下,车辆动力响应均能满足规范要求;在温度和不同倍数徐变共同作用下,随着徐变变形增大,脱轨系数、轮轴横向力和横向加速度变化极小,轮重减载率有一定变化,但幅度较小,均对温度和徐变引起的长波不平顺不敏感;温度和徐变对车体竖向加速度的影响显著,随着徐变变形增大,车体竖向加速度明显增大,车辆竖向加速度可作为高速铁路拱桥变形控制限值的主要评判指标。
        A long-span deck-type concrete arch bridge was taken as the research object. By means of vehicle-bridge coupling analysis method, the dynamic responses of vehicle-bridge system under the combined action of temperature and creep were analyzed. Furthermore, the control index and limit value of bridge deformation were investigated. Results show that under the combined action of temperature and original creep, the dynamic responses of vehicles can meet the requirements of codes. Under the combined action of temperature and creeps with different multiples, with the increase of creep deformation, the derailment coefficient, wheel-axle lateral force and lateral acceleration change very little, while the reduction rate of wheel load has a certain change but the amplitude is small. All of them are insensitive to the long wave irregularities caused by temperature and creep. The effects of temperature and creep on the vertical acceleration of carbody are significant. With the increase of creep deformation, the vertical acceleration of carbody increases obviously. The vertical acceleration of carbody can be used as the main evaluation index of deformation control limits for high-speed railway arch bridge.

引文

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