Probabilistic impact fragility analysis of bridges under Barge collision and local scour

•Probabilistic impact fragility was proposed to characterize bridge failure under barge collision and local scour hazards.•Experimentally verified nonlinear material models through scaled pier-foundation model testing were used in the numerical finite-element simulation of barge-bridge collision.•Scour significantly increased the probability of major damage and collapse at high barge-bridge impact velocities.