大跨度悬索桥温度效应监测与理论分析

Temperature Effect Monitoring and Theoretical Analysis of Long Span Suspension Bridge

依托重庆万州驸马长江大桥结构健康监测系统,介绍了连通管及压力变送器在大跨度悬索桥挠度监测中的应用情况,研究基于温度效应的大跨度悬索桥长期监测和评估,结果表明钢箱梁竖向变形和梁端纵向位移随环境温度发生较大变形,温度效应显著。此外,建立有限元模型进行大跨度悬索桥温度效应的理论分析,温度效应现场监测值与理论分析结果基本吻合,验证了连通管和压力变送器系统用于监测大跨度悬索桥温度效应的可靠性。

Based on structural health monitoring system of Chongqing Wanzhou Fuma Yangtze River Bridge,in this paper the application of connected pipe and pressure transmitter deflection monitoring system in the long span suspension bridge are introduced,and the long-term monitoring and evaluation of long-span suspension bridges based on temperature effect are studied.The results show that steel box girder vertical deformation and longitudinal displacement are greatly deformed with the ambient temperature,and temperature effect is significant.In addition,the finite element model is established to analyze the temperature effect of the long-span suspension bridge.Field monitoring value is basically consistent with the theoretical analysis results.The reliability of the connected pipe and pressure transmitter system for monitoring the temperature effect of the long-span suspension bridge is verified.