更高速度条件下铁路简支箱梁关键参数研究

发布时间：2018-06-14 20:13

本文选题：高速铁路 + 简支箱梁　；参考：《铁道标准设计》2015年11期

【摘要】：针对梁体基频、竖向刚度等参数,概述我国高速铁路桥梁参数的研究思路及成果、参数设计及运营现状,采用车桥竖向相互作用程序分析铁路简支箱梁动力响应规律。结果表明,梁体基频为设计参数的控制因素,梁体实测梁体基频高于设计值和规范限值,梁体刚度存在一定的储备;时速350 km的高速铁路简支箱梁可适应更高速度420 km/h的运营要求;420 km/h速度等级高速铁路简支箱梁关键参数可参考350 km/h速度等级相关参数;40 m跨度车桥动力响应明显降低,梁体基频等动力参数不再控制梁体设计,建议开展高速铁路更大跨度简支箱梁应用研究。
[Abstract]:Aiming at the parameters of beam foundation frequency and vertical stiffness, this paper summarizes the research ideas and achievements of bridge parameters, parameter design and operation status of high-speed railway in China. The dynamic response law of simply supported box girder is analyzed by means of vehicle-bridge vertical interaction program. The results show that the fundamental frequency of the beam body is the control factor of the design parameters, the measured fundamental frequency of the beam body is higher than the design value and the limit value of the code, and the stiffness of the beam body has a certain reserve. The simply supported box girder of 350km / h can meet the operational requirements of the higher speed of 420 km/h. The key parameters of the simply supported box girder of the high-speed railway can refer to the relevant parameters of the 350 km/h speed grade and the dynamic response of the 40m span vehicle-bridge is obviously reduced. The design of beam body is no longer controlled by dynamic parameters such as foundation frequency of beam body, so it is suggested to carry out the research on the application of long-span simply supported box girder in high-speed railway.
【作者单位】：中国铁道科学研究院铁道建筑研究所;高速铁路轨道技术国家重点实验室;
【基金】：中国铁路总公司科技研究开发计划项目(2013B001-A-2) 铁道科学技术研究发展中心科研项目(J2014G009)
【分类号】：U448.13

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