Dynamic Responses of Bridge Piers with Aluminum Foam Anti-Collision Devices Under Vehicle Impact

摘要

In view of the vulnerability of bridge piers under the impact of vehicles, a new aluminum foam bridge pier anti-collision device was presented in this paper. Three-dimensional finite element models developed by LS-DYNA were used to simulate the process of the collision between the vehicle and pier. The dynamic responses of the bridge piers with the anti-collision device and without the anti-collision device are analysed and compared, including the collision force, pier-top displacement and energy transfer. It can be seen from the test results that when the aluminum foam anti-collision device was installed, the collision force of the vehicle was reduced by 37.5%, the maximum pier-top displacement was reduced by 10%, and 86.8% of the vehicle kinetic energy in the collision process was absorbed by the anti-collision device. This research could provide references for the future anti-collision design of bridge piers under vehicle impact.