Interaction between bridge abutment and piers concerning local scour

Download

12625630.pdf

Date

2020-8

Author

Akbulut, Ömer Faruk

Metadata

Show full item record

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

Item Usage Stats

260
views

297
downloads

Flowing water usually causes transportation of loose non-cohesive materials, called sediment in literature, in natural open channels such as rivers and canals with a transportable material bed. This sediment transportation is observed in two different situations; deposition and erosion. Excessive erosion leads in scouring. Scouring can be classified in three groups; general, contraction and local scour. Scouring namely removal of bed material from bridge sites causes bridge failures. Hence, estimation of scour depth around bridge piers and abutments is essential for safety and economic design in alluvial rivers. Although local scour around bridge piers and abutments has been studied separately by a large number of investigators, there is almost no research in the literature related to interaction between these two structures. Hence, in this study the aim is to investigate the interaction between bridge abutment and pier scours in detail. For this reason bridge abutments and piers of different sizes were placed at various distances from each other in a long sediment channel and tested under clear-water flow conditions with a constant flow intensity. After conducting sufficient number of tests, the related experimental data were obtained. All the important dimensionless parameters involved in the phenomenon were derived from dimensional analysis and the relationships between them were investigated. The analysis of the available data showed that the presence of pier(s) in the flow medium in addition to an abutment has a certain amount of influence on the formation of scour holes around the structures. The relations between the dimensionless scour parameters and related dimensionless independent parameters were determined graphically. A series of empirical equations were derived to estimate the scour parameters around the pier-abutment arrangements consist of one pier-one abutment and two piers-one abutment cases.

Subject Keywords

Local scour, Scour interaction, Bridge abutment, Bridge piers

URI

https://hdl.handle.net/11511/69313

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Composite reliability model for local scour around cylindrical bridge piers Yanmaz, Ali Melih (2001-06-01) Bridge scour is an extremely complex phenomenon because of the random characteristics of sediment laden flow in close proximity to piers and abutments. This occurrence leads to high uncertainties and unavoidable risk in bridge pier and abutment design. In this study, a composite reliability model is developed for the reliability assessment of bridge pier scour using static resistance - loading interference. Based on the physical interpretation of the phenomenon and a statistical analysis of the available in...
Surface Characteristics of Scouring at Bridge Elements Yanmaz, Ali Melih (2007-03-01) Infrastructural elements of bridges mounted in alluvial stream beds are susceptible to scouring. Decision-making for the type and placement practice of relevant countermeasures to be implemented against scouringaction is based on investigation of the characteristics of scour holes formed around piers and abutments. Thiswould also lead to the estimation of the safe depth of burial of footings of bridge infrastructural elements.Sets of experiments have been performed to investigate time-dependent characterist...
Design of settling basins and related problems encountered in practice Zaloğlu, Fatma Deniz; Göğüş, Mustafa; Department of Civil Engineering (2013) Settling basins are the hydraulic structures used to get sediment-free water from rivers mostly for hydropower systems. Mainly fine sediment is trapped along the settling basins and from time to time the accumulated sediment in the settling basin is flushed away. A wrong design of a settling basin creates lots of problems. In this study based on the hydraulic analysis of a settling basin, the available settling basin design procedures in the literature were reviewed. Some of the settling basins constructed ...
Temporal Variation of Scour Hole around Spill Through Bridge Abutments at Various Contraction Ratios Yildiz, Burhan; Köken, Mete; Göğüş, Mustafa (2013-09-13) This study deals with the temporal variation of scour around spill through bridge abutments at clear water conditions. Two spill through bridge abutments are connected at opposite sides of the sediment storage part of a rectangular channel which has a length of 29 m and a width of 1.5 m. Development of the scour is measured continuously at different cross sections around the abutment during experiments that lasted for 8 hours. These measurements are taken using an ultrasonic ranging system. Besides these co...
Development of a safetyinspection methodology for river bridges Berk, Aysu; Yanmaz, Ali Melih; Department of Civil Engineering (2006) River bridges get damaged or even collapse because of various reasons, such as development of adverse hydraulic conditions during severe floods, disastrous earthquakes, deficiencies in structural and geotechnical design, material deficiencies, or other unexpected external factors. Failure of service at vital lifelines, bridges, can lead to loss of several lives and properties, traffic disruption, and/or deficiencies in daily usage. Existing structures should be monitored periodically for decision-making and...

Citation Formats

Ö. F. Akbulut, “Interaction between bridge abutment and piers concerning local scour,” Ph.D. - Doctoral Program, Middle East Technical University, 2020.