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Railroad bridges. --- Ponts-rails. --- Bending moment. --- Moment fléchissant.

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Strength of materials. --- Résistance des matériaux. --- Bending moment. --- Moment fléchissant. --- Strains and stresses. --- Contraintes (mécanique)

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Béton armé. --- Reinforced concrete. --- Cisaillement (mécanique) --- Shear (Mechanics) --- Moment fléchissant. --- Bending moment.

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Fluid mechanics. --- Mécanique des fluides. --- Bending moment. --- Moment fléchissant. --- Strains and stresses. --- Contraintes (mécanique) --- Mécanique des fluides. --- Moment fléchissant. --- Contraintes (mécanique)

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It is of major importance for design purposes that long-term effects coming from the sea are accurately predicted by classification societies, which must not be exceeded during the lifetime operation of a given vessel. It is encountered that Inland-Navigation Bureau Veritas rules (NR247) do not assess the seakeeping behaviour and do not predict sea loads adequately. To deal with this, a development of empirical-formulas was carried to account for inland-vessel responses when operated in stretches of water within the range of navigation of 0.6 m ≤ Hs ≤ 2 m, based on linear potential-flow theory, boundary element method and the 3D linear panel method theory. A frequency-domain linear analysis for an impossed constant speed of 10 knots is taken into account. Using the Belgian Coastal Scatter Diagram, it was found the hydrodynamic long-term response for a return period of 17 years, composed of motions, accelerations, relative elevation, shear forces and bending moments; encountered in a set of 46 inland vessels. Then, by mean of a regression process, a set of empirical equations was proposed accounting for these effects. They were validated against an additional set of 13 direct-calculation results, showing good agreement. Finally, to take into account discrepancies originated from lineartheory assumptions, proposed empirical models are corrected by taking into account nonlinear hydrodynamic effects.

Inland Navigation, Seakeeping, Bending Moment, Potential Flow, Rule-formulas, Linear Analysis, RAO, Long-term value, Statistics, Regression --- Ingénierie, informatique & technologie > Ingénierie civile