结合伸缩缝工况和疲劳寿命估算方法的高速公路桥梁伸缩缝性能优化设计  

Performance Optimization Design of the Expansion Joint of Expressway Bridge Based on the Working Condition of Expansion Joint and Fatigue Life Estimation Method

作　　者：袁海龙 YUAN Hai-long(Langfang Traffic Highway Engineering Co.Ltd.2nd Company,Langfang 065000,China)

机构地区：[1]廊坊市交通公路工程有限公司二公司,河北廊坊065000

出　　处：《工程建设与设计》2025年第4期64-66,共3页Construction & Design for Engineering

摘　　要：介绍了高速公路桥梁伸缩缝及其破坏原因,探讨了基于不同伸缩缝工况的桥梁伸缩缝疲劳寿命估算方法设计,以廊涿高速公路为研究对象,分析文中提出的伸缩缝疲劳寿命估算方法的有效性。结果表明,通过提高锚固区混凝土强度和调整设计参数,能显著延长伸缩缝的使用寿命。This paper introduces the freeway bridge expansion joints and their failure causes,and discusses the design of fatigue life estimation method based on different expansion joint working conditions,and analyzed the effectiveness of the proposed fatigue life estimation method on the Langfang-Zhuozhou expressway as the research object.The results show that the service life of the expansion joint can be extended significantly by improving the concrete strength and adjusting the design parameters.

关 键 词：伸缩缝 桥梁 寿命估算 高速公路 荷载 受力特性 

分 类 号：U443.31[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]