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Published in:
2021 | OriginalPaper | Chapter
Three-Dimensional Study on Aerodynamic Drag Coefficients of Cable-Stayed Bridge Pylons by Finite Element Method
Authors : Van-My Nguyen, Thanh-Hoang Phan, Hoang-Nam Phan, Duc-Anh Nguyen, Minh-Nhat Ha, Dinh-Tuan Nguyen
Published in: Structural Health Monitoring and Engineering Structures
Publisher: Springer Singapore
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Abstract
This study aims to determine aerodynamic drag coefficients of cable-stayed bridge pylons with different shapes through a computational fluid dynamics (CFD) approach. The approach is based on a three-dimensional model of the turbulent wind flow around pylon using the finite element ANSYS CFX software. Numerical models of the flow around simple objects are first carried out and the results are validated with the previous work in the literature. To identify the most suitable turbulent modeling approach, numerical analyses of five turbulent models including k-epsilon, k-omega, shear stress transport, BSL Reynolds stress, and SSG Reynolds stress are performed on a single pylon. Next analyses for other examined pylons of cable-stayed bridges in Vietnam are conducted to determine their aerodynamic drag coefficients. Surface pressure acting on each pylon is also investigated. Finally, the discussion on the effects of the pylon shapes on drag coefficients and surface pressures as well as vortex flows is presented in detail.