NUMERICAL SIMULATION OF COLLISION RESISTANCE OF PREFABRICATED HYBRID FIBER REINFORCED CONCRETE BRIDGE PIERS
This paper studies the dynamic behavior and anti-collision performance of prefabricated hybrid fiber re-inforced concrete (HFRC) bridge pier under vehicle collision. A vehicle-pier model is established in ABAQUS,and a modified concrete damage plasticity model is adopted to consider the influence of fibers on the mechanical proper-ties of concrete. Based on the explicit dynamics analysis method,the dynamic response of prefabricated bridge piers under vehicle impact is simulated. A comparative analysis is conducted on the differences in deformation,material damage,and prestress changes between HFRC and ordinary reinforced concrete bridge piers. The results show that compared with ordinary concrete bridge pier,HFRC bridge pier has smaller overall displacement,residual deforma-tion,material damage at the collision point,and stress changes in prestressed reinforcement under vehicle collision,indicating better impact resistance and overall stability.
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