高速铁路大跨度钢桥梁端伸缩装置设计研究  

Research on Bridge Expansion Joint of HSR Long Span Steel Bridges

作　　者：郭辉 蒋金洲 高芒芒 刘晓光 赵会东 苏朋飞 朱颖 何东升[4] GUO Hui;JIANG Jinzhou;GAO Mangmang;LIU Xiaoguang;ZHAO Huidong;SU Pengfei;ZHU Ying;HE Dongsheng(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High-speed Railway,Beijing 100081,China;China Railway Economic and Planning Research Institute,Beijing 100038,China;China Railway Major Bridge Reconnaissance&Design Institute Co.Ltd.,Wuhan 430050,China)

机构地区：[1]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 [2]高速铁路轨道技术国家重点实验室,北京100081 [3]中国铁路经济规划研究院有限公司,北京100038 [4]中铁大桥勘测设计院集团有限公司,武汉430050

出　　处：《铁道建筑》2020年第10期1-7,共7页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(N2018G033);中国铁道科学研究院基金(2018YJ036)。

摘　　要：高速铁路大跨度钢桥的梁端纵向伸缩量大且变位复杂,需设置钢轨伸缩调节器与梁端伸缩装置。为保证梁端区域行车安全平稳,开展了梁端伸缩装置总体方案和结构构造设计研究,提出了基于性能的梁-轨一体化伸缩装置设计方法,对梁端伸缩装置各项性能进行了分析验证。研究结果表明:在梁端设计总伸缩量±900 mm及以下范围,下承式和上承式梁端伸缩装置均能满足结构整体刚度要求,上承式梁端伸缩装置因支承梁高度受限,需增大支承梁截面宽度,同时增加支承梁数量;下承式梁端伸缩装置设计应考虑与钢轨伸缩调节器的协同,伸缩区扣件建议选择纵向阻力较小且相对稳定的轨撑式扣件;以甬舟铁路西堠门大桥为例,基于弦测法和车桥耦合振动分析结果表明,±900 mm上承式梁端伸缩装置可以满足梁端行车安全和平稳的性能要求。The rail expansion joint(REJ)and bridge expansion joint(BEJ)shall be installed at the girder end of high speed railway(HSR)long span steel bridge due to the large expansion amount in the longitudinal direction and the complexity of displacement.To guarantee the running safety and comfort of running train on the girder end,the overall design and detailed structure of bridge expansion joint were studied and the performance-based design method was proposed.The performance of bridge expansion joint was analyzed and verified.Results show that both of the through and deck type BEJ can satisfy the requirements of overall stiffness at the scale of total expansion of±900 mm.The deck type BEJ shall increase the width and the number of supporting beam.As for the through type BEJ,the coordination of BEJ and REJ shall be considered,and the fastener with lower resistance shall be selected.Taking Xihoumen Bridge of Ningbo-Zhoushan Railway as an example,the running safety and stability of running train on the girder end can be satisfied for the deck-type BEJ according to the analysis based on the chord measuring method and bridge-vehicle coupled vibration.

关 键 词：高速铁路 梁-轨一体化设计 车桥耦合振动 梁端伸缩装置 支承梁 轨撑式扣件 活动钢枕 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]