Development of a safetyinspection methodology for river bridges

Berk, Aysu
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 necessary protective works should be implemented to increase the safety. Types of items to be inspected would be categorized as structural, geotechnical, hydraulic, and status of materials. Requirement for periodic inspections and the ways of handling these activities are discussed within the framework of aforementioned aspects with special reference to the current situation of river bridges in Turkey and current practices in USA. An algorithm, composed of sets of checklists, is proposed. In such an algorithm, rank-based prioritization of events is identified. The evaluation and interpretation are displayed with the help of a few case studies, selected among several river bridges around Ankara.


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Computer aided analysis of flow through river bridges
Yanmaz, Ali Melih (null; 2001-05-20)
The major failure mode of a bridge results mainly from hydraulic deficiencies in the design. Flow conditions through bridge openings should be investigated to observe the degree of hydraulic conformity for the given structural system. A computer program is developed to carry out hydraulic and structural computations jointly for bridges crossing rivers having irregular cross-sections with flood plains. The program has analysis and design options. In the analysis part of the program, steady state water surfac...
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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...
Citation Formats
A. Berk, “Development of a safetyinspection methodology for river bridges,” M.S. - Master of Science, Middle East Technical University, 2006.