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Impact Force Models for Bridge Under Barge Collisions
The impact force model plays a pivotal role in the design of impact-resistant bridge piers and the rapid evaluation of bridge dynamic behavior under barge collisions. In this chapter, the focus is on this critical model. Firstly, the refined FE models and corresponding material model parameters for barges and piers are validated through impact tests on scaled replicas of Jumbo Hopper barge bows and flexible impactor lateral collision tests on RC columns. Then, the validated numerical algorithm and material models are employed to reproduce a prototype barge-bridge collision test, evaluating the barge bow crushing process, depth, as well as the temporal profiles of barge impact force and pier displacement. Subsequently, to capture the intricate dynamics of barge-bridge interactions, numerical simulations of a total of 54 prototype barge impact scenarios are conducted, accounting for factors such as barge's strain rate, surrounding water, soil-pile interaction, inertial effects of the superstructure, and nonlinear deformations of both the barge and bridge. These simulations vary the impact velocity and mass of barges traversing inland waterways to assess their dynamic behaviors. Finally, based on the FE analysis results, two analytical impact force models are formulated: a triangular distribution and a multiple linear distribution. These models are further validated through an additional nine randomly generated impact cases. The proposed impact force models offer a direct means for rapidly assessing the barge impact resistance of bridge piers, without the need for complex barge modeling.
Impact Force Models for Bridge Under Barge Collisions
The impact force model plays a pivotal role in the design of impact-resistant bridge piers and the rapid evaluation of bridge dynamic behavior under barge collisions. In this chapter, the focus is on this critical model. Firstly, the refined FE models and corresponding material model parameters for barges and piers are validated through impact tests on scaled replicas of Jumbo Hopper barge bows and flexible impactor lateral collision tests on RC columns. Then, the validated numerical algorithm and material models are employed to reproduce a prototype barge-bridge collision test, evaluating the barge bow crushing process, depth, as well as the temporal profiles of barge impact force and pier displacement. Subsequently, to capture the intricate dynamics of barge-bridge interactions, numerical simulations of a total of 54 prototype barge impact scenarios are conducted, accounting for factors such as barge's strain rate, surrounding water, soil-pile interaction, inertial effects of the superstructure, and nonlinear deformations of both the barge and bridge. These simulations vary the impact velocity and mass of barges traversing inland waterways to assess their dynamic behaviors. Finally, based on the FE analysis results, two analytical impact force models are formulated: a triangular distribution and a multiple linear distribution. These models are further validated through an additional nine randomly generated impact cases. The proposed impact force models offer a direct means for rapidly assessing the barge impact resistance of bridge piers, without the need for complex barge modeling.
Impact Force Models for Bridge Under Barge Collisions
Springer Tracts in Civil Engineering
Wu, Hao (author) / Cheng, Yuehua (author) / Ma, Liangliang (author)
2024-08-20
32 pages
Article/Chapter (Book)
Electronic Resource
English
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