Theoretical and experimental evaluation of the superstructure dynamic response in case of hanger failure
https://doi.org/10.52170/1815-9265_2023_67_68
Abstract
At present in the world practice of bridge construction, various combined systems are widely used with steel elements exclusively subjected to tensile forces. The analysis of operating experience shows, there is a risk of failure of the flexible element. Such a minor accidental impact on a particular element can lead to considerable or total failure of the structure, which naturally accompanied by catastrophic economic and social consequences. Therefore, bridges analysis in case of a sudden failure of a flexible element is of great practical importance.
The publication deals with single failure of a flexible element in a tied arch. This article shows the experimental verification of dynamic response of bridge superstructure model in the case of single failure of a flexible element, presents two basic theoretical methods of structural analysis in the case of element failure – a simplified static analysis (with dynamic load factor) and the direct dynamic analysis method, gives the comparison of theoretical and experimental data.
It shown, that quasi-static analysis, recommended by domestic and foreign standards, does not permit exactly the superstructure stress-strain state over time and evaluate the possibility of the whole structure progressive collapse.
About the Authors
P. O. Kurchanov
Emperor Alexander Ι St. Petersburg State Transport University
Russian Federation
Russian Federation
Pavel O. Kurchanov – Postgraduate of the Bridges Department
Saint-Petersburg
D. A. Yaroshutin
Bridges Competence Center
Russian Federation
Russian Federation
Dmitriy A. Yaroshutin – the General Director
Saint-Petersburg
D. A. Shestovitskiy
Emperor Alexander Ι St. Petersburg State Transport University
Russian Federation
Russian Federation
Dmitriy A. Shestovitskiy – Associate Professor of the Bridges Department, , Candidate of Engineering
Saint-Petersburg
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Review
For citations:
Kurchanov P.O., Yaroshutin D.A., Shestovitskiy D.A. Theoretical and experimental evaluation of the superstructure dynamic response in case of hanger failure. Bulletin of Siberian State University of Transport. 2023;(4):68-75. (In Russ.) https://doi.org/10.52170/1815-9265_2023_67_68
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