Evaluation of scouring reliability at bridge abutments

Serious scouring may take place around bridge abutments during floods, which can lead to considerable damage or structural collapse. Design of abutment footings must, therefore, rely on the estimation of maximum possible depth of scour through the bridge opening. Deterministic scour-prediction equations are based on simplified assumptions and they do not account for randomness of the scouring variables, which leads to an unavoidable risk in footing design. This study is concerned with the development of a new reliability model for scouring around bridge abutments using the resistance-loading methodology. The validity of the proposed model is tested using the Advanced First Order Second Moment (AFOSM) and the Monte Carlo simulations. In an example, it is shown that the results of the proposed model are in good agreement with these simulations. It is also observed that the execution of this model is less time-consuming than the latter approaches. A sensitivity analysis is carried out to examine the effects of coefficients of variation and probability distributions.


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...
Effects of collars on local scour around semi-circularend bridge abutments
Daşkın, Süeyla; Göğüş, Mustafa; Department of Civil Engineering (2011)
During severe floods, bed material around bridge piers and abutments are scoured by the flow and as a result, bridges are subject to damages. These damages are mostly unrepairable and can result in loss of lives and property. In this thesis study, abutment scour under clear-water condition was investigated and collars were tested as scour countermeasures around the abutments. The experimental study was carried out in a rectangular channel with an almost uniform cohesionless bed material of d50=1.50 mm for a...
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Kalaycı, Ahmet Serhat; Topkaya, Cem; Department of Civil Engineering (2005)
In highway bridge construction, composite curved girder bridges are becoming more popular recently. Reduced construction time, long span coverage, economics and aesthetics make them more popular than the other structural systems. Although there exist some methods for the analysis of such systems, each have shortcomings. The use of Finite Element Method (FEM) among these methods is limited except in the academic environments. The use of commercial FEM software packages in the analysis of such systems is cumb...
Assessment of tunnel induced deformation field through 3-dimensional numerical models (Necatibey subway station, Ankara, Turkey)
Aktürk, Özgür; Doyuran, Vedat; Department of Geological Engineering (2010)
In heavily settled areas, deformations induced by the tunnel excavation may cause serious damage to nearby structures. In this study it is aimed to model ground deformations induced by main tunnels and connection tunnels excavations as well as groundwater drainage. Therefore, it is necessary to study effective means of controlling tunnel induced deformations. The main parameters affecting the failure and deformation state of the soil around a circular underground opening are the physical characteristics of ...
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 ...
Citation Formats
A. M. Yanmaz, “Evaluation of scouring reliability at bridge abutments,” 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37131.