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CONFERENCE PROCEEDINGS
5th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2017 , 2017.y., pp. 29-36


OBSERVATION REGARDING THE BEHAVIOUR OF EXISTING STEEL TRUSS GIRDER BRIDGES WITHLARGE SPANS
 
DOI: 10.14415/konferencijaGFS2017.002
UDC: 624.3
CC-BY-SA 4.0 license
Author : Toduţi, Luiza; Badea, Ioan; Petzek, Edward; Băncilă, Radu
 
 Summary:
 At the end of the 19th and the beginning of the 20th century many of steel truss girder bridges – for large spans, were conceived as semi parabolic truss girders. Some of these structures are still in operation on the railway network, or isolated as highway bridges. The live loads increased in time; for the railway bridges in present the UIC 71 convoy and for highway bridges the EC 1 loads are required. The ratio between the dead load (which remained the same) and the live load (which increased), can lead to some interesting observations, regarding the stresses in some bridge elements. This situation can be observed in many existing bridges situated in South – Est of Europe.
 
 Keywords:
 parabolic truss girder, counter diagonals