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A monumental bridge with a problem caused by oversights in design

A monumental bridge with a problem caused by oversights in design In January 2004, one of the lower hanger plates of the Bosporus Bridge in Istanbul, Turkey, fractured. Emergency repairs were performed on some of the plates and a bridge evaluation project was initiated to understand the cause of the problem and to devise appropriate solutions. This paper summarizes the evaluation process and the results. The scope included short- and long-term hanger force and plate strain measurements, finite element analysis, non-destructive testing (NDT), probabilistic analysis, and remaining service-life estimation. The investigation showed unusual behaviour of the bridge superstructure that is attributed to the inclined configuration of the hanger cables introducing additional stiffness and attracting additional forces from a variety of sources. The evaluation has shown that many of the hanger plates are at the critical stage of their service life. This paper describes an example of oversights in design that has left a monumental bridge in a critical condition 30 years after its construction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bridge Structures IOS Press

A monumental bridge with a problem caused by oversights in design

Bridge Structures , Volume 2 (2) – Jan 1, 2006

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Publisher
IOS Press
Copyright
Copyright © 2006 by IOS Press, Inc
ISSN
1573-2487
eISSN
1744-8999
DOI
10.1080/15732480600852088
Publisher site
See Article on Publisher Site

Abstract

In January 2004, one of the lower hanger plates of the Bosporus Bridge in Istanbul, Turkey, fractured. Emergency repairs were performed on some of the plates and a bridge evaluation project was initiated to understand the cause of the problem and to devise appropriate solutions. This paper summarizes the evaluation process and the results. The scope included short- and long-term hanger force and plate strain measurements, finite element analysis, non-destructive testing (NDT), probabilistic analysis, and remaining service-life estimation. The investigation showed unusual behaviour of the bridge superstructure that is attributed to the inclined configuration of the hanger cables introducing additional stiffness and attracting additional forces from a variety of sources. The evaluation has shown that many of the hanger plates are at the critical stage of their service life. This paper describes an example of oversights in design that has left a monumental bridge in a critical condition 30 years after its construction.

Journal

Bridge StructuresIOS Press

Published: Jan 1, 2006

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