哈尔滨工程大学学报2022，Vol.43Issue(7)：950-957,8.DOI:10.11990/jheu.202107081
大跨悬索桥塔梁纵向位移控制阻尼器病害分析
Analysis of the damper diseases for controlling the longitudinal displacement between the tower and main girder of a long-span suspension bridge
摘要
Abstract
Taking a suspension bridge across Yangtze River as an engineering background，the disease mechanism and treatment measures of longitudinal damper of this bridge were analyzed in detail based on field observation and monitoring data. Firstly，the paper describes the disease of the dampers in detail，e. g.，bolt fracture，pin slip-out and ear plate fracture. Afterwards，the cause of the damper disease is analyzed based on the measured transverse and vertical relative displacements between the tower and main girder. On that basis，the improvement design and replacement of the new dampers are carried out. Finally，according to the longitudinal relative displacement between the tower and main girder recorded by the bridge health monitoring system，the movement condition of the main girder before and after the damper is compared and analyzed. Results show that the maximum transverse and vertical relative displacements between the tower and main girder can reach 25 mm and 60 mm. The large relative displacement between the tower and main girder makes the stress on the two side ears of the longitudinal damper un-balanced，which leads to the diseases such as pin slip-out and ear plate failure of the damper. Improvement of damper includes structural measures and strength measures，mainly including optimization of baffle，ear plate and pin shaft，etc. The improved and optimized damper is in good service condition.关键词
大跨度悬索桥/塔梁相对位移/纵向阻尼器/粘滞流体阻尼器/病害机理/改进优化/实测验证/维护Key words
long-span suspension bridge/relative displacement between the tower and main girder/longitudinal damper/viscous fluid damper/disease mechanism/improvement optimization/measurement verification/maintenance分类
交通工程引用本文复制引用
宗海,庞振浩,茅建校,王浩..大跨悬索桥塔梁纵向位移控制阻尼器病害分析[J].哈尔滨工程大学学报,2022,43(7):950-957,8.基金项目
国家自然科学基金项目(51978155,52108274). （51978155,52108274）
