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Fatigue Tests of New Assembly Bolt Connections for Perspective Temporary Steel Railway Bridges
The paper deals with the problems of the actual behavior, failure mechanism and load-carrying capacity of the special bolt connection developed and intended for the assembly connections of truss main girders of perspective railway temporary steel bridges. Within the framework of this problem solution, several types of structural details of assembly joints have been considered as the conceptual structural design. Based on the preliminary evaluation of advantages or disadvantages of these ones, in principle two basic structural configurations – so-called “tooth” and “splice-plate” connections have been selected for the subsequent detailed investigation. This investigation is mainly based on the experimental verification of the actual behavior, strain and failure mechanism and corresponding strength of the connection, and on its numerical modeling using FEM. This paper is focused only on the cyclic loading (fatigue) tests results of “splice-plate” connections and their evaluation, which have already been finished. Simultaneously with the fatigue tests, the static loading tests have been realized too, but these ones, as well as FEM numerical modeling, are not the subject of this paper.
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[1] M. Karmazínová and M. Štrba, “Static loading tests of new type of bolt assembly connection developed for perspective temporary steel railway bridges”, Applied Mechanics and Materials, Trans Tech Publications: Zurich, Vol. 590, 2014, pp. 331-335, doi: 10.4028/ AMM.590.331. ISSN 1660-9336.
[2] M. Karmazínová, “Fatigue tests of assembly joints of truss main girders of temporary footbridge for pedestrians and cyclists”, Applied Mechanics and Materials, Trans Tech Publications: Zurich, Vol. 405- 408, 2013, pp. 1598-1601, doi: 10.4028/ 408.1598. ISSN 1660-9336.
[3] M. Karmazínová and P. Simon, “Fatigue tests of assembly joints of truss main girders of newly developed temporary footbridges”, International Journal of Mechanics, NAUN: U.S.A., Vol. 7, 2013, Issue 4, pp. 475- 483. ISSN 1998-4448.
[4] M. Štrba, “On the problems of testing methodology used in case of the temporary steel through truss footbridge development”, International Journal of Mechanics, North Atlantic University Union: U.S.A., Issue 2, Vol. 7, 2013, pp. 73-80. ISSN 1998-4448.
[5] M. Karmazínová and J. Melcher, “Material testing and evaluation of steel mechanical properties for classification of steel grade of existing civil engineering structure”, Advanced Materials Research, Trans Tech Publications: Zürich, Vol. 651, 2013, pp. 274-279, doi: 10.4028/www. ISSN 1022-6680.
[6] J. Melcher, “Full-scale testing of steel and timber structures: Examples and experience”, In Structural Assessment – The Role of Large and Full Scale Testing, E & FN SPON, London 1997, pp. 301-308.
[7] M. Karmazínová, “Design assisted by testing – a powerful tool for the evaluation of material properties and design resistances from test results”, International Journal of Mathematical Models and Methods in Applied Sciences, Vol. 6, No. 2, 2012, pp. 376-385. ISSN 1998-0140.
[8] Eurocode 1: EN 1990 Basis of Structural Design: Annex D – Design assisted by testing (2nd Edition), CEN Brussels, 2011.
[9] Eurocode 3: EN 1993-1-1 Design of Steel Structures, Part 1-1: General Rules and Rules for Buildings, CEN Brussels, 2008.
[10] Eurocode 3: EN 1993-1-9 Design of Steel Structures, Part 1-9: Fatigue, CEN Brussels, 2012.
[11] ČSN 73 1401 Design of Steel Structures, Czech Technical Institute for Normalization, Prague, 1998.
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