基于监测数据的悬索桥加固技术及其应用  

Strengthening Technique for Suspension Bridge Based on Monitoring Data and Its Application

作　　者：战昂[1] 周江[1] 牛宏[1] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《世界桥梁》2013年第2期84-89,共6页World Bridges

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.

关 键 词：悬索桥 加固 吊拉组合体系 监测数据 斜拉索 张拉力 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U445.72[交通运输工程—道路与铁道工程]