A Simplified Simulation Strategy for Barge-Bridge Collision

This chapter endeavors to establish a reliable and efficient FE modeling technique for barge-bridge collision simulations, leveraging the explicit dynamic FE analysis software LS-DYNA. Firstly, a coupled high-resolution FE model (HRM) is formulated for the Taiyangbu Bridge, simulating its response to barge side impacts. The bridge's collapse mechanisms are numerically replicated, aligning the predicted failure patterns and collapse sequences with actual accident footage. To enhance computational efficiency, a suite of simplified bridge FE models is developed, including two superstructure models (a simplified shell model and an equivalent mass model) and two substructure models employing fiber-based beam elements. These models undergo comparative numerical simulations, leading to the identification of the optimal simplified FE modeling approach for bridges through comparisons with the HRM's predictions. Then, a decoupled dynamic impact force modeling technique is introduced, replacing the intricate barge model. This approach captures the distribution of dynamic impact forces along the pier's height and perimeter. A simplified simulation strategy for barge-bridge collision analyses is proposed, integrating the optimized simplified FE modeling for bridges and the decoupled dynamic impact force modeling. Finally, the applicability of this simplified strategy is validated for head-on collision scenarios. This work offers an efficient numerical simulation method for evaluating and designing bridges’ resistance to barge impacts, thereby contributing to the safety and durability of inland waterway bridges.