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

9th International Symposium on Steel Bridges

材料科学;运输工程

Nikolova, Martina^1 ; Georgiev, Lazar^1

Roads and Transport Structural Facilities Department, FTE, UACEG, Hr. Smirnenski blvd 1, Sofia

1046, Bulgaria^1

关键词: Deck structures;    Design standard;    Innovative solutions;    Load-bearing capacity;    Railway infrastructure;    Reinforced concrete plates;    Riveted railway bridges;    Shell element;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/419/1/012001/pdf
DOI  :  10.1088/1757-899X/419/1/012001

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

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.