Zenonas Kamaitis - Influence of functionally obsolete bridges on the efficiency of road network. Part II: case studies (Vol VIII, No 2)

Vilnius Gediminas Technical UniversityRiga Technical UniversityTallinn University of TechnologyBaltic Road Association

 

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2015 Impact Factor: 0.519 ©2015 Thomson Reuters, 2015 Journal Citation Report®

ISSN 1822-427X print
ISSN 1822-4288 online
 

 

 
 

"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2013, Vol VIII, No 2, p. 75-82


Zenonas Kamaitis
Influence of functionally obsolete bridges on the efficiency of road network. Part II: case studies
DOI: 10.3846/bjrbe.2013.10
 
This study is the first practical step in Lithuania to identify the characteristics causing the bridges to be functionally obsolete. A bridge of which current deck geometric characteristics, safety barriers or railings, underclearances, and roadway approach alignment are deficient and not consistent with current design standards (or traffic demands) can be considered as functionally obsolete. In Part I of this paper the criteria of functionally obsolete bridges, deficiency categories and assessment of deficient structures are presented. The Part II reports experience in city bridge stock of 83 structures for a short period of 25 years on this subject. Surveying revealed that 58.5% of bridge stock shows minor or obvious signs of functional aging. Evaluation and rating of city bridge stock was undertaken. Illustrative examples of functionally obsolete bridges are presented. Recommendations for improvement of the geometrical characteristics of bridges in existing Lithuanian design codes are envisaged.
 
Keywords:  urban bridges, functional obsolescence, bridge widths, underclearances, safety features, approach roadway, condition rating.

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