Effect of Pier Inclination Angle on Local Scour Depth Around Bridge Pier Groups

Date

2018-10-01

Author

Bozkuş, Zafer
DINCER, A. Ersin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

200
views

0
downloads

The primary objective of this study is to investigate experimentally local scours around bridge pier groups at various inclination angles of piers and also to develop empirical local scour depth equations. In the study, two bridge pier groups are used. In each pier group, the most upstream and downstream piers are placed in an inclined manner at 10 degrees and 15 degrees. The vertical case was also employed for comparison purposes. Seventy-two experiments each lasting 6 h are conducted under uniform-flow and clear-water conditions for a range of water depths and velocities on the uniform bed material. This study confirms that inclination of cylindrical piers located at the most upstream and downstream locations of pier groups directly affects the local scour in a favourable manner, with a substantial reduction in the local scour, especially around the most upstream pier. Moreover, the flow intensity and relative flow depth are important factors that characterize the local scour. An empirical scour depth equation is developed for each pier inclination angle for design engineers. Comparisons with previous studies are made and results discussed.

Subject Keywords

Pier groups, Local scour, Inclination angle of bridge piers, Clear-water condition, CLEAR-WATER SCOUR

URI

https://hdl.handle.net/11511/33383

Journal

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING

DOI

https://doi.org/10.1007/s13369-018-3141-2

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Effects of inclination of bridge piers on scouring depth Bozkuş, Zafer (2004-08-01) For a safe design of a bridge pier footing, it is important to estimate the maximum depth of scour as accurately as possible. The aim of this experimental study is to investigate the effects of inclination of bridge piers on local scour depths around bridge piers. Single circular piers inclined toward the downstream direction were founded in a uniform bed material. Near threshold conditions were employed. The results of this study indicate that the local scour depth decreases as the inclination of the pier ...
Uncertainty of local scouring parameters around bridge piers Yanmaz, Ali Melih (2001-03-01) Reliability-based assessment of local scouring mechanism around bridge piers provides information for decision-making regarding the pier footing design. Parameter uncertainties that may arise from various sources due to the inability to precisely quantify a parameter need to be estimated in order to quantify the level of risk of pier failure during the physical life of a bridge. By examining extensive experimental data from the literature on local scour depth around various shapes of bridge pier the functio...
Clear-water scour evolution at dual bridge piers Yilmaz, Meriç; Yanmaz, Ali Melih; Köken, Mete (2017-04-01) For the efficient design of bridge pier footings, computation of time-evolution of scour depth around bridge piers is essential. In this paper, a semi-empirical model is developed to estimate the temporal variation of clear-water scour depth at a couple of identical cylindrical uniform piers in tandem arrangement. The experiments are carried out using different pier size, pier spacing, and flow intensities. The model development is based on sediment continuity approach and volumetric sediment transport rate...
Effect of spur dike length on the horseshoe vortex system and the bed shear stress distribution Köken, Mete; Göğüş, Mustafa (2015-03-04) Turbulent flow structures forming around isolated spur dikes in a horizontal channel are investigated in this study. In the analysis detached eddy simulation is used under fully turbulent incoming flow conditions at a channel Reynolds number of 45,000. Changes in the structure of the horseshoe vortex system, bed shear stress and pressure standard deviation on the bed are investigated for three different spur dike lengths. In all of the cases the main horseshoe vortex undergoes bimodal oscillations, which le...
Effect of dynamic soil-bridge interaction modeling assumptions on the calculated seismic response of integral bridges Erhan, Semih; Dicleli, Murat (2014-11-01) In this study, the effect of soil-structure modeling assumptions and simplifications on the seismic analyses results of integral bridges (lBs) is investigated. For this purpose, five structural models of lBs are built in decreasing levels of complexity starting from a nonlinear structural model including close numerical simulation of the behavior of the foundation and backfill soil and gradually simplifying the model to a level where the effect of backfill and foundation soil is totally excluded. Nonlinear ...

Citation Formats

Z. Bozkuş and A. E. DINCER, “Effect of Pier Inclination Angle on Local Scour Depth Around Bridge Pier Groups,” ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, pp. 5413–5421, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33383.