Title: Evaluation of dynamic impact of flow with bridge pier using smoothed particle hydrodynamics method

Authors: Tu Anh Do; Thuan Huu Nguyen; Hai Manh Nguyen; Nhiem Duc Tran; Long Ngoc Nguyen

Addresses: Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam ' Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam ' Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam ' Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam ' Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam

Abstract: This paper presents a numerical model for the hydrodynamic impact of water flow with a bridge pier placed on a group of piles using the smoothed particle hydrodynamics (SPH) method. A new boundary processing technique using a combination of ghost particles and dynamic boundary particles is implemented in the SPH simulations of this study. The numerical probes are uniformly distributed over the vertical surface of the structure in order to obtain detailed measurements of the flow pressure on the structure over time. Using the SPH simulations, the velocity field of the unstable flow surrounding the piles and the equivalent hydrodynamic force acting on the pile cap are determined. The vulnerable impact locations on the structure surface are also predicted from the time-pressure histories. Additionally, the predicted hydrodynamic pressure values are compared with those proposed by AASHTO (2012) for bridge design considerations.

Keywords: smoothed particle hydrodynamics; SPH; flow impact load; pile/pier-flow interaction; bridge pile cap.

DOI: 10.1504/PCFD.2020.111401

Progress in Computational Fluid Dynamics, An International Journal, 2020 Vol.20 No.6, pp.332 - 348

Received: 22 Aug 2019
Accepted: 17 Feb 2020
Published online: 25 Nov 2020 *

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