This paper presents a numerical framework for simulating impacts of bore-like flows on bridge structures using the meshless Smoothed Particle Hydrodynamics (SPH) method. Tsunami-like waves are of significant engineering interest, as there is growing concern about the safety of civil structures due to the increasing intensity and frequency of catastrophic events. To address the loads caused by such events, numerical simulations provide simplified yet reliable and cost-effective alternatives to expensive experimental studies. In this study, we investigate the response of a two-dimensional model of a bridge deck subjected to an energetic dam-break flow within the open-source DualSPHysics solver. The validation of our approach involves comparing numerical data on pressures, forces, and water levels with benchmark experimental test results. Despite modeling the bridge deck as a rigid structure, the meshless DualSPHysics method yields accurate results that closely match the physical measurements, suggesting that the fidelity of fluid phase reproduction, achieved by the SPH method, outweighs the need for rigorous assumptions about the structure's elasticity when estimating general loads. Overall, our findings highlight the accuracy of the SPH method in simulating violent free-surface flows, emphasizing its relevance in assessing the impact of bore-like flows on bridge structures. The close agreement between the numerical results and experimental data further supports the use of numerical simulations as a valuable tool for studying and mitigating potential structural hazards. [ABSTRACT FROM AUTHOR]