Problems and innovative solutions considering "open type" bridge deck structures in old steel riveted railway bridges

There are 331 steel bridges with total length 11201,70m in exploitation in the railway infrastructure of the Republic of Bulgaria. Significant part of those bridges is with "open type" deck including longitudinal and cross beams. The stress state of a standard bridge deck of an old steel r...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 419; no. 1; pp. 12001 - 12006
Main Authors Nikolova, Martina, Georgiev, Lazar
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2018
Subjects
Bearing capacity
Bridge decks
Bridge loads
Bridges
Design standards
Exploitation
Load bearing elements
Railway bridges
Reinforced concrete
Reinforcing steels
Steel bridges
Truss bridges
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Summary:There are 331 steel bridges with total length 11201,70m in exploitation in the railway infrastructure of the Republic of Bulgaria. Significant part of those bridges is with "open type" deck including longitudinal and cross beams. The stress state of a standard bridge deck of an old steel riveted truss bridge along Sofia - Varna railway line at km 17 + 536 (representing wide class of bridges in exploitation) is analysed in this paper in accordance with the prescriptions of the Eurocode design standard. Results, obtained from different FEM (with Frame and Shell elements) indicate that the load bearing capacity of longitudinal and cross beams is significantly insufficient, which is due to increased loads and some specificity of the construction details. On the other hand there is an overage of load bearing capacity for the elements of the main truss and the effect of an innovative concept for replacement of the existing "open type" deck with new reinforced concrete plate is investigated and analyzed.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/419/1/012001