Abstract:Aiming at the difficulty of controlling the deformation of half traffic and half construction caused by the transverse splicing of steel box girder bridge in stages in the construction of G15 Jialiang Expressway Reconstruction and Expansion Project, combined with a variety of measurement methods without and with targets, the non-contact digital image correlation (DIC) technology is adopted to monitor the time-history data of dynamic deflection, the maximum deflection data and the distribution of bridge vibration deformation at different monitoring points under vehicle load. Meanwhile, the results of data analysis show the feasibility of applying DIC technology in the measurement of bridge displacement, which can evaluate the vibration characteristics for the connection of transverse segmental assembled bridges under traffic conditions, and provides an important technical reference for the construction monitoring of the subsequent reconstruction and expansion projects of the old bridges.
