Research on New Flexible Bridge Pier Anti-collision Technology

Abstract

With the increase of ship traffic flow, ship size and ship tonnage have increased significantly, while the original anti-collision design of many bridges built in early China has not met the protection requirements, resulting in the increase of the risk of bridge collision by ships. Ship collision with bridges can not only cause huge economic losses, but also result in fatal accidents, leaving a huge hidden danger to the safety of bridges. In this paper, the advanced safety protection concept of ship, bridge and device triple protection is introduced, and a new flexible pier anti-collision technology is used, the additional pile isolation type flexible anti-collision device is proposed.The LS-DYNA dynamic numerical simulation software is used to analyze the dynamic behavior of the ship collision avoidance device. The results show that the anti-collision device using flexible components can store large deformation energy in the process of ship collision. Compared with the theoretical calculation of ship impact force, the ship impact force is significantly reduced after the installation of the new flexible protective device. The flexible anti-collision device proposed in this paper can provide a reliable design for bridge anti-collision.