大东线黄沙河桥无缝化改造受力性能研究  

Research on the Mechanical Performance of Seamless Transformation of Huangsha River Bridge on Dadong Line

作　　者：李文涛 焦晓磊 马洪福 张一民 王甫友 LI Wen-tao;JIAO Xiao-lei;MA Hong-fu;ZHANG Yi-min;WANG Fu-you(Shijiazhuang Institute of Railway Technology,Shijiazhang 050047,China;Tianjin Highway Development Service Center,Tianjin 300182,China;Tianjin Transportation Research Institute,Tianjin 300074,China)

机构地区：[1]石家庄铁路职业技术学院,石家庄市050047 [2]天津市公路事业发展服务中心,天津市300182 [3]天津市交通科学研究院,天津市300074

出　　处：《公路》2025年第4期177-182,共6页Highway

基　　金：国家自然科学基金,项目编号52308132。

摘　　要：伸缩装置是桥梁工程养护过程中修复和更换最为频繁的易损构件。伸缩装置一旦破损将引起桥面和梁板结构的破坏,产生不利于纵梁结构承载力和耐久性的次内力,影响结构耐久性和行车安全性。以大东线黄沙河桥为依托,针对该桥伸缩缝存在严重病害的现状,提出了桥面铺装连续化改造和桥台处延伸桥面板无缝化改造两种无缝化改造方案,选取温度和汽车荷载作为影响因素,分析了在其作用下大东线黄沙河桥经过无缝化改造后的受力性能。The expansion device is the most frequently repaired and replaced vulnerable component in the maintenance process of bridge engineering.Once being damaged,it will cause damage to the bridge deck and beam-slab structure,resulting in secondary internal forces that are not conducive to the bearing capacity and durability of the longitudinal beam structure,affecting the structural durability and driving safety.In the paper,relying on the Huangsha River Bridge on the Dadong Line,in view of the severe damages of the expansion joints,two seamless transformation schemes which are continuous transformation of bridge deck pavement and the continuous transformation of the extended bridge deck at the abutment are proposed.The temperature and vehicle load are selected as the influencing factors,the mechanical performance of the Huangsha River Bridge on the Dadong Line after seamless transformation is analyzed.

关 键 词：桥梁工程 伸缩缝 延伸桥面板 无缝化改造 受力性能 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]