Abstract: In response to the situation that precast segmental reinforced concrete (PSRC) piers are threatened by barge collision, a numerical simulation analysis of the dynamic behavior of PSRC piers under barge impact was carried out using the explicit dynamics software ANSYS/LS-DYNA. Based on the impact test of rigid body-PSRC pier, barge bow-rigid pendulum hammer and bow-RC piers, by comparing the simulated and experimental damage modes and dynamic responses of the pier and the bow, the reliability of the numerical simulation method was verified. High-fidelity finite element models of the prototype PSRC pier and the barge were established, and the numerical simulation analysis of the barge impacting PSRC piers was performed. The damage mode and dynamic response of PSRC and cast-in-place monolithic reinforced concrete (CMRC) piers under barge impact were compared, and the influence of impact angle, number of segments, initial prestress and shear keys on the barge-impact resistance of PSRC piers was discussed. The results show that in the scenarios discussed, both the CMRC and the PSRC piers experience an identical impact load. The CMRC pier suffers flexural damage, while there is only minor concrete damage at the impact region of the PSRC pier. Due to the energy dissipation provided by the frictional sliding at the segment joints and the flexural stiffness increase of the pier provided by the prestressed steel strands, the lateral deformation of the PSRC pier is significantly smaller than that of the CMRC pier, demonstrating that the PSRC pier has superior barge impact-resistant performance. The barge impact-resistant performance of PSRC piers is gradually enhanced with the increase in initial prestress and the reduction in the number of segments, while the impact angle and shear keys have a relatively minor influence.