Journal of Applied Science and Engineering

Published by Tamkang University Press


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Long Nguyen-Ngoc1, Tu Anh Do This email address is being protected from spambots. You need JavaScript enabled to view it.1, Thuan Huu Nguyen1, Tien Duy Nguyen1, Anh Tuan Tran1, Nam Xuan Ho1, and Dinh Hai Nguyen2

1Department of Bridge Engineering and Underground Infrastructure, University of Transport and Communications, No. 3 Cau Giay Street, Dong Da District, Hanoi, Vietnam
2Department of Construction Materials, University of Transport and Communications, No. 3 Cau Giay Street, Dong Da District, Hanoi, Vietnam


Received: July 29, 2022
Accepted: November 28, 2022
Publication Date: February 17, 2023

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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In this study, a Smoothed Particle Hydrodynamics (SPH) model for fluid-solid interaction is developed considering the effect of water flow transient impact, water pressure and velocity around a bridge pier. Two common types of bridge pier shape consisting of rectangular and circular piers are analyzed. The SPH predicted water pressure values and those calculated using the Computational Fluid Dynamics (CFD) method and the AASHTO LRFD bridge design specifications. The results show that the pier shape has a significant influence on the resultant water flow pressure acting on the pier. The values computed using the numerical methods (SPH and CFD) are similar but both smaller than that computed according to the AASHTO code when the fluid velocity is greater than 4 m/s acting on the rectangular pier. The obtained results can be used to examine the water flow velocity and pressure around bridge piers, and to evaluate the risk of soil scouring at the pier locations. The methodology proposed in this research can improve the accuracy of computed impact force values in bridge design.

Keywords: Smoothed Particle Hydrodynamics; flow impact load; fluid pressure; bridge pier; pier-flow interaction


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