高速铁路大跨度斜拉桥运营监测应用  

Application of Operation Monitoring for High-speed Railway Largespan Cable-stayed Bridge

作　　者：成文彬 CHENG Wenbin(China Railway Guangzhou Group Co.Ltd,Guangzhou,Guangdong 510088,China)

机构地区：[1]中国铁路广州局集团有限公司,广州510088

出　　处：《铁道工程学报》2024年第12期83-87,共5页Journal of Railway Engineering Society

摘　　要：研究目的:广汕高铁增江特大桥主桥采用(48+84+260+84+48)m双塔混凝土斜拉桥,是世界首座采用节段预制拼装工艺建设的高铁斜拉桥。为掌握节段预制拼装大跨度斜拉桥的长期运营性能,该桥建立了符合其结构特点的健康监测系统,对各项静动力参数开展长期监测,并与理论计算分析作对比,力求把握结构特性,准确分析评价结构运营状态。研究结论:(1)该桥当前的环境参数均在适宜范围以内,对结构无不利影响;(2)结构静应变、支座位移和主梁挠度均表现出受温度影响明显的特征和规律,具有较强的相关性,从各项实测指标来看,结构静态指标正常;(3)通过捕捉列车过车的响应对结构动态特性指标进行验证,结合车桥分析结果,该桥的刚度和运营舒适性较好,桥梁整体性能良好;(4)本研究成果可为同类型桥梁开展运营监测提供参考。Research purposes:The Zengjiang Bridge of Guangzhou-Shanwei High-speed Railway is the world's first high-speed railway bridge constructed using segmental prefabrication and assembly method.In order to master the longterm operational performance of the bridge,a health monitoring system that conforms to its structural characteristics was established,to monitor the static and dynamic parameters for a long time,and the results were compared with theoretical calculation and analysis,so as to grasp the structural characteristics and accurately analyze and evaluate the operation status of the structure.Research conclusions:(1)The current environmental parameters for this bridge are within suitable ranges and have no adverse effects on the structure.(2)The static strain,bearing displacement,and deflection of the structure exhibit clear characteristics and patterns that influenced by temperature,showing strong correlations.From the measured indicators,the static indicators of the structure are normal.(3)By capturing the response of the bridge when high speed train passing,the dynamic characteristics of the structure are verified.Combined with vehicle-bridge analysis results,the bridge demonstrates good stiffness and operational comfort,indicating overall good performance.(4)The research result can provide a reference for operational monitoring of similar types of bridges.

关 键 词：高速铁路 斜拉桥 静力特性 动力特性 

分 类 号：U24[交通运输工程—道路与铁道工程]