摘要
为了确定悬索桥吊拉组合体系加固结构中斜拉索的合理张拉力,根据已有理论提出一种基于监测数据的悬索桥加固技术。以某悬索桥加固为背景,对该悬索桥的主缆温度位移、荷载位移以及桥塔荷载位移进行监测,基于监测数据建立斜拉索索力预测模型,采用该模型得出斜拉索的合理张拉力。该悬索桥加固完成后,通过斜拉索索力实测表明:基于监测数据的悬索桥加固技术具有较高的可靠性,该技术能够较准确地反映既有悬索桥的实际受力状态。
In order to determine the rational tensioning force for stay cables in a strengthening structure of combined cable-stayed and suspension system, a suspension bridge strengthening technique based on monitoring data was proposed in accordance with the existing theories. The strengthening of an actual suspension bridge was taken as the study background. The displace- ment of the main cables induced by temperature, the displacement of the main cables induced by loads and the displacement of the towers induced by loads were monitored, the predicting model of cable forces was set up based on the monitoring data to work out the rational tensioning force for the stay cableS. After the completion of the suspension bridge strengthening, the cable forces of the stay cables were measured. The results of the measurement indicate that the strengthening technique for suspension bridges based on the monitoring data has high reliability, which can, to a certain extent, accurately reveal the actual force condition of an existing suspension bridge.
出处
《世界桥梁》
北大核心
2013年第2期84-89,共6页
World Bridges
关键词
悬索桥
加固
吊拉组合体系
监测数据
斜拉索
张拉力
suspension bridge
strengthening
combined cable-stayed and suspension sys- tem
monitoring data
stay cable
tensioning force
