engleski

Inspection of railway bridge over the river Sloboština next to Okučani

The Railway Bridges (north and south) over the river Sloboština near to Okučani is part of double-track line Zagreb – Slavonski Brod. This article presents statical and dynamical testing of the Railway Bridges which were reconstructed and strengthened for the purpose of categorization. Categorization which includes inspection of the construction according to now day’s loads, the old railway bridges (north from 1889, south from 1947 year) were strengthened against a side impact. In article will be represented south Railway Bridge. Statical load consisted of two electrical locomotives type of HZ 1141 with mass of approximately 82 tons, which were connected. Statical testing was carried out through total of 7 phases of loading and load releases, to cause maximum internal forces in main bearing elements of construction. During the static load displacements were measured at 18 measuring points by surveying method of levelling on all significant points of the bridge. Strains were measured at 5 measuring points. Dynamic testing of the bridge was carried out to determine dynamic parameters of the structure (natural frequencies, dynamic increment of the structure, relative dumping).

static; dynamic; inspection; bridge; strain; deflection

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