既有250 km/h高速铁路32 m简支箱梁提速至300 km/h适应性分析  

Adaptability Analysis of 32 m Simply Supported Box Girder of Existing 250 km/h High Speed Railway to Speed Up to 300 km/h

作　　者：赵健业 胡所亭[1] 王巍 ZHAO Jianye;HU Suoting;WANG Wei(China Academy of Railway Sciences,Beijing 100081,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院,北京100081 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2022年第7期74-76,共3页Railway Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划(K2021G019);国家万人计划科研项目(2021WR001)。

摘　　要：基于我国250 km/h高速铁路桥梁现状,研究既有250 km/h高速铁路32 m简支箱梁提速至300 km/h的适应性。结果表明:既有250 km/h高速铁路32 m简支箱梁车桥耦合动力响应分析、梁体竖向自振频率、竖向刚度、动力性能能够满足提速至300 km/h的要求。动车组列车以300 km/h及以下速度通过时,梁体跨中竖向振动加速度满足TB 10621—2014《高速铁路设计规范》中的限值要求,梁体竖向振动加速度能够满足提速至300 km/h的要求。Based on the current situation of 250 km/h high speed railway bridges in China,the adaptability of 32 m simply supported box girder of existing 250 km/h high speed railway to speed up to 300 km/h was studied. The results show that the coupling dynamic response analysis,vertical natural vibration frequency,vertical stiffness and dynamic performance of the 32 m simply supported box girder of the existing 250 km/h high speed railway can meet the requirements of speeding up to 300 km/h. When the EMU train passes at the speed of 300 km/h and below,the vertical vibration acceleration of the beam mid-span meets the limit requirements specified in TB 10621—2014 Code for Design of High Speed Railway,and the vertical vibration acceleration of the beam can meet the requirements of speeding up to300 km/h.

关 键 词：高速铁路桥梁 试验研究 提速适应性 竖向自振频率 竖向刚度 竖向振动加速度 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]