摘要
1966年葡萄牙4月25日大桥建成后交通量持续增加以至于出现很多病害,1996年葡萄牙工程师历时三年对大桥进行了扩建,在不中断交通的情况下将原4车道公路桥扩建为6车道和双线铁路的公铁两用桥,原2根主缆上方各增设了1根辅助主缆,还更换了下层桁架和拓宽公路桥面,并安装结构健康监测系统。扩建工程虽造价高昂,20多年以来运营效果表明:新旧结构间的共同工作性能良好,病害很少,结构健康监测系统也可实时监测外部作用与桥梁结构响应,为大桥运营维护提供参考。该桥的扩建措施突破了悬索桥主缆不能更换的传统思路,至今仍是首创,可为今后在役悬索桥的维护改造提供了新思路。
After the completion of the 25 de Abril Bridge in Portugal in 1966,the traffic volume continued to increase,resulting in many diseases.In 1996,Portuguese engineers began to renovate and retrofit the bridge for three years without interrupting traffic,where the existing 4-lane roadway bridge was retrofitted into a highway railway dual bridge of 6-lane and double track railways,two auxiliary main cables were added above the original two main cables respectively,the lower deck steel trusses were replaced,the roadway deck was widened,and the structural health monitoring system was installed.Although the cost of the retrofitting project is high,the operation effect over the past 20 years shows that the joint working performance between the old and new structures is good,and there are few diseases.The structural health monitoring system can monitor the imposed action and the structural response in real time,providing reference for the operation and maintenance of the bridge.The retrofitting and widening measures of the bridge break through the traditional idea that the main cable cannot be replaced,which is still the first of its kind,and provide brand new ideas for the maintenance and retrofitting of bridges of in-service suspension bridge in the future.
作者
白洪涛
叶华文
黄若森
尹开川
黄永福
李杰
BAI Hongtao;YE Huawen;HUANG Ruosen;YIN Kaichuan;HUANG Yongfu;LI Jie(Yunnan Institute of transportation planning and design,Kunming 650011,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期2088-2094,共7页
Building Structure
基金
云南省交通运输厅科技创新及示范项目(云交科教便(2020)126号)
关键词
葡萄牙4月25日大桥
悬索桥扩建
主缆增设
结构健康检测系统
运营维护
25 de Abril Bridge
retrofitting of suspension bridge
addition of main cable
structural health monitoring system
operation and maintenance
