Citation

Nasim M, Setunge S, Zhou S, Mohseni H. Struct. Infrastruct. Eng. 2019; 15(2): 219-229.

Copyright

(Copyright © 2019, Informa - Taylor and Francis Group)

DOI

10.1080/15732479.2018.1545792

PMID

unavailable

Abstract

This study simulates the flood effect on piers using a finite volume method in the ANSYS-FLUENT package. The pier is modelled as a non-structural column with a rectangular and a circular cross-section. To simplify the methodology, the pier, as well as the bed and side walls, is assumed to have non-slip boundaries for the fluid domain. A crucial feature of this investigation is the consideration of the effect of water while it is flowing around an object like a bridge pier and the distribution of pressure along the pier height. A numerical model is proposed to explore the influence of variation of velocity on the hydrodynamic force and pressure distribution exerted on piers. A significant finding is that the shape of the pier cross-section has a significant effect on the fluid pressure exerted on bridge piers under flood loading. It is noted that the AS5100 method is appropriate for a conservative estimation of the pressure on rectangular piers, whereas the technique will have a risky safety margin for bridge piers with a circular cross-section and need to be used with caution.

Language: en

Keywords

bridge piers; computational fluid dynamics; finite volume methods; flood hazard; Flood loading; hydraulics; hydrodynamics; shape effect