Akademik Veri Yönetim Sistemi
Structure and Infrastructure Engineering, 2025 (SCI-Expanded)
The impact resistance of bridge piers under vehicle collision is of vital importance. In addition to possibility of catastrophic failures, severe damages that cause long-term closures of bridges may affect the transportation network. Considering the computational efficiency and numerous possible collision scenarios, the calculation of elastic shear demand is priority for designers. The design and assessment of monopile-supported bridge piers subjected to vehicle collision require special consideration of soil–structure interaction. In the dynamic stiffness method (DSM), each monopile segment in a soil layer is modelled as a single beam–column element, enabling efficient computation of the modal superposition–based dynamic response of monopile-supported piers. In contrast to conventional static-based approaches or dynamic studies that neglect foundation flexibility, the proposed framework efficiently represents monopile–soil interaction in layered soils and captures higher-order mode effects essential for impact response. The results indicate that the shear demand at the pier bottom consistently exceeds that in the monopile. While the stiffness of the upper soil layer moderately affects shear demand, its influence is more significant compared to that of the lower soil layer. Furthermore, the AASHTO equivalent static method substantially underestimates shear demand by up to 677% at high vehicle velocity.