Research on Expansion Joint Displacement Monitoring Technology of Wuhan Tianxingzhou Yangtse Bridge

The bridge structure displacement is an important factor of its structure safety.The excessive structure displacement will not only cause the overrun of strain, also affect the bridge normal use.The structure displacement change can reflect the structure internal problems.The Wuhan Tianxingzhou Yangtze Highway-Railway Bridge of dual-use is set as a research object, it monitors the displacement expansion joint by using grating displacement sensor, and judges the safety of structure with beam displacement test data.