The existing heavy-haul railway concrete simply supported double-T-type beam bridges can not meet the requirements of heavy haul transport. So, a strengthening method of bonding assisted steel beams for the existing heavy-haul railway bridges was put forward. Using the theory of train-track-bridge time-varying system, the spatial dynamic analysis model of train-track-bridge system was set up. And based on the existing heavy-haul railway concrete simply supported double-T-type beam bridge and strengthening method, the dynamic response was analyzed, the dynamic response of bridges at different s...
