Relationship of cable tension and temperature based on long-term monitoring data on the cable-stayed bridge

Based on the Jiujiang Bridge Structural Health Monitoring System, lots of data of cable tension and temperature have been acquired. The preliminary analysis of the cable tension and the corresponding temperature shows that there is a long-term growth trend for the cable tension, and exists a certain correlation between the cable tension and the temperature. Using linear fitting method, the growth trend term of the cable tension and the correlation between the cable tension and the temperature of the typical cable are analyzed rationally. By getting rid of the long-term growth trend term and the influence of temperature for the cable tension, the early warning limit of the cable tension state evaluation is determined.