2015 №01 (05) DOI of Article
2015 №01 (07)

The Paton Welding Journal 2015 #01
TPWJ, 2015, #1, 35-42 pages

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 1, 2015 (January)
Pages                      35-42
V.V. Knysh1, S.A. Solovej1, A.A. Grishanov1, G.O. Linnik2 And M.G. Malgin3
1E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
2Ukrzaliznytsya. 5 Tverskaya Str., 03680, Kiev, Ukraine. E-mail: cpi@lotus.uz.gov.ua
3MIDAS Information Technology Co., Seul, Korea. E-mail: malgin@midasit.com
Proposed is a new structure of fastening of slabs of ballast-free bridge deck to T-girders of railway bridges, which provides for change of thread studs to welded ones. Arc-contact welding allows for stud positioning directly over vertical wall of T-girder that does not result to angular deformation of girder upper flange typical in application of thread studs. Aim of present work was evaluation of possibility of application of welded studs for fastening of slabs of ballast-free bridge deck in construction and repair of railway bridges. For that, fatigue tests of welded joints of stud to upper flange of girder from the most wide-spread steels St3sp (killed) and 09G2S were carried out at different ranges of loading, which are realized in stud preliminary tightened with 6 tf force during rolling stock movement. It is determined that cyclic life of such joints exceeds 5x106 cycles of stress alternation at loading range DP Г 3 tf. Numerical simulation showed that application of oak board and rubber band as spacing layer between slab of ballast-free bridge deck provides for cyclic life of welded stud not less than 5x106 cycles of stress alternation, since loading range exceeds DP = 3 tf. However, application of fast hardening nonshrinking mixtures (cast-in-place concrete) as spacing layer allows reducing range of loading to DP = 1 tf, that guarantees welded stud life not less than 5x106 cycles of stress alternation. 13 Ref., 2 Tables, 16 Figures.
Keywords: welded joint, welded stud, slab of balast-free bridge deck, fatigue resistance, fatigue test
Received:                20.11.14
Published:               28.02.15
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