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Contents of the issue

2022 №02 (07) DOI of Article
2022 №02 (01)

The Paton Welding Journal 2022 #02
The Paton Welding Journal, 2022, #2, 48-53 pages

Calculated estimation of load-carrying capacity of the main span beams of the E.O. Paton bridge across the Dnipro in Kyiv by nondestructive testing results

O.O. Makhnenko, O.V. Makhnenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The paper deals with of the features of the design and loading parameters of the main longitudinal beams of the E.O. Paton Bridge across the Dnipro. It is shown that by the results of examinations, the welded joints are in a satisfactory condition, no inadmissible defects or fatigue cracks were detected in them, but rather considerable local corrosion damage appeared as a result of water flowing through the beam structures. The constructed finite element model of the main span beam was used to perform a calculated estimation of its loading and of the change of load-carrying capacity in the presence of local corrosion defects in the zone of the web and lower flange joint. Results of numerical modeling showed that the presence of these defects does not cause any significant increase of stresses in the span beam. Analysis of load-carrying capacity revealed that although the welded structure of the main span beams of the bridge has a rather high static strength margin under the action of normative distributed loading, presence of local corrosion defects of material discontinuity of rather large size considerably lowers the fatigue resistance of welded joints with detected defects that is dangerous in terms of span structure reliability and, therefore, requires immediate performance of repair operations.
Keywords: bridge welded structure, main span beam, load-carrying capacity, corrosion defect, normative load, stressed state, numerical methods

Received: 11.10.2021
Accepted: 31.03.2022


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