Vulnerability Analysis of Structural Systems under Extreme Flood Events

Vulnerability analyses of coastal or inland bridges in terms flood actions and structural fluid flow characteristics are carried out. In particular, a numerical model based on two-phase is implemented for the multiphase system, whereas three-dimensional formulation shell/volume finite elements adopted structure. The governing equations can simulate interaction between fluids structures, by using Arbitrary Lagrangian–Eulerian (ALE) strategy. results hydrodynamic forces, bridge displacements dynamic amplification factors (DAFs) show that existing formulas, available literature design codes, do not accurately predict maximum effects. For investigated cases, DAFs may vary from 1 to 4.5. worst scenarios observed upload vertical direction. Finally, performance protection fairing system investigated. such devices able efficiently reduce effects wave load applied hydraulic forces structure deformability, with 40% more accuracy than unprotected configuration.