Earthquake Response Of Arched Bridge In The Hydrodynamic Effect And The Analysis On The Ship-bridge Impect

Recently, following the rapid development of national traffic refrastr-ucture, river crossing bridges are built continuously, many of them are adopt the parten of RC arched bridge. If the navigable stage is too high, part of main arch ring is inundated in the water. YunNan province is the ragion where earthquake are frequently occurred, it make great sense to analyse the seismic response of such kind of bridge, and if the ship is offset direction, it may hit the main arch ring. Under this background, this paper focused on the RC tank type arch bridge of GeLan beach hydroelectric station on LiXian river, inundated channel S214 line of complex line K4+852, analyzed the ship-bridge impact considering the hydrodynamic effect, the follow works have done in the paper:1. Models considering and without considering the hydrodynamic effect are established, and analyzed the seismic history response,3 kinds of seismic input methods are concluded, along the bridge, cross the bridge and along(1.0) +cross(1.0)+vertical(0.5). Compared the displacement, axial force, and moment of the key position on the main arch ring, seismic response rules of the calculation model are summarized. Contributions on the hydrodynamic effect to seismic response of arch bridge are concluded.2. Adopting the impact history force of 3000t inland river ship bridge to the along and cross direction impact, dynamic response of main arch ring are concluded:the displacement is not obvious, most of the main arch ring is in compression, the compression stress is much less than the design strength of C50, in the extent of elastic work.