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Seismic-Vehicular Impact Design of RC Bridge Piers
Bridge piers designed according to the seismic specifications are likely to be subjected to the accidental vehicular collisions during its service life cycle, while the correlations between the seismic capacity and impact resistance of bridge pier are rarely studied, as well as the practical damage evaluation approach. Aiming to fill this gap, firstly, four double-pier RC bridges, adhering to Chinese seismic design standards and accounting for varying seismic hazard levels, are designed. The corresponding FE models of those designed bridges are established. Utilizing validated material models and numerical algorithms, a total of 108 vehicle-pier collision scenarios are systematically simulated. These scenarios encompassed a range of vehicles, including lightweight pickup trucks, medium-sized Ford 800 trucks, and heavy tractor-trailers, with varying payloads from 3 to 30 tons and collision velocities of 40–120 km/h. Through the analysis of pier deformation and vehicular impact forces, it observed that bridge piers designed with enhanced seismic capacity exhibited lower damage levels, sustaining higher impact speeds from heavy trucks and enduring consecutive cargo impacts. Furthermore, it identified five typical failure modes for seismic-designed bridge piers under vehicular collisions, such as localized pier damage and overall bridge structure collapse. To provide a more comprehensive damage evaluation, a novel explicit damage index that considers factors of pier diameter and shear-span ratio is introduced. This index can be used to assess the damage levels of vehicle-impacted piers and the entire bridge structure, and the corresponding damage evaluation diagrams are given.
Seismic-Vehicular Impact Design of RC Bridge Piers
Bridge piers designed according to the seismic specifications are likely to be subjected to the accidental vehicular collisions during its service life cycle, while the correlations between the seismic capacity and impact resistance of bridge pier are rarely studied, as well as the practical damage evaluation approach. Aiming to fill this gap, firstly, four double-pier RC bridges, adhering to Chinese seismic design standards and accounting for varying seismic hazard levels, are designed. The corresponding FE models of those designed bridges are established. Utilizing validated material models and numerical algorithms, a total of 108 vehicle-pier collision scenarios are systematically simulated. These scenarios encompassed a range of vehicles, including lightweight pickup trucks, medium-sized Ford 800 trucks, and heavy tractor-trailers, with varying payloads from 3 to 30 tons and collision velocities of 40–120 km/h. Through the analysis of pier deformation and vehicular impact forces, it observed that bridge piers designed with enhanced seismic capacity exhibited lower damage levels, sustaining higher impact speeds from heavy trucks and enduring consecutive cargo impacts. Furthermore, it identified five typical failure modes for seismic-designed bridge piers under vehicular collisions, such as localized pier damage and overall bridge structure collapse. To provide a more comprehensive damage evaluation, a novel explicit damage index that considers factors of pier diameter and shear-span ratio is introduced. This index can be used to assess the damage levels of vehicle-impacted piers and the entire bridge structure, and the corresponding damage evaluation diagrams are given.
Seismic-Vehicular Impact Design of RC Bridge Piers
Springer Tracts in Civil Engineering
Wu, Hao (author) / Cheng, Yuehua (author) / Ma, Liangliang (author)
2024-08-20
29 pages
Article/Chapter (Book)
Electronic Resource
English
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