PRACTICAL NUMERICAL SIMULATION OF LOCAL SCOUR AROUND A BRIDGE PIER

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  • 橋脚まわりの局所洗掘推定のための実用的数値シミュレーションの開発
  • キョウキャク マワリ ノ キョクショ センクツ スイテイ ノ タメ ノ ジツヨ

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Abstract

In order to evaluate the impact of bridge piers in a river on their downstream channel and hydraulic works, it is necessary to develop some effective numerical methods for estimating local scour as the supplement of the hydraulic model experiment. This study is intended to construct a three-dimensional numerical simulation model for the local scour around a bridge pier by improving Fukuoka's three-dimensional model in the computation of water flow and considering appropriately the non-equilibrium sediment transport in the calculation of bed variation. It is shown that the numerical simulation model can obtain, with adequate accuracy, solutions that are in good agreement with the experimental results of the local scour from the large-scale hydraulic model.

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