Lectures

Design and construction of Railway Road Bridge in Novi Sad

Aleksandar Bojović, TEO at DEL ING d.o.o.
Novak Novaković, Structural Engineer at DEL ING d.o.o.

The construction of the Railway Road Bridge across the Danube in Novi Sad, Serbia is in progress. The bridge is situated on the way of the major international electrified railroad No 2 Belgrade-Budapest and designed for to railway tracks (160 km/h), two road lanes and two footpaths, with the total width of 31,5 m. The bridge structure consists of four structures: two approach composite structures at the banks and two steel tied network arches over the river. The spans are 27,0+177,0+3,0+219,0+48,0 m, totally 474,0 m length. The height of arch structures is 34,0 m and 42,0 m respectively. The arches and ties as well as the girders of the approach spans are steel boxes. The decks of the arch bridges are the composite reinforced concrete slabs thickness of 300mm. The structures of the approach spans are three girder structures, with the reinforced concrete slab between the external girders and over the central girder. The arch structures are assembled on the banks and launched as a whole over bank on platforms and skids and over the river on the barges, to the final position on piers. The launching itself is very complex and unique in the analysis and in realization way. The bridge is designed according to requirements of German Guidelines Ril 804:2003, series of DIN-Fachbericht 101 to 104:2009 and actual editions of European norms series EN 1991, 1992, 1993, 1994 and 1998. The bridge is the biggest railway road bridge on Danube. The arch structure of 219 m span is the biggest tied arch network bridge in the world. The Contractor for the construction is the Spanish company Azvi.

Studies on eco-friendly concrete incorporating waste as artificial aggregate

M.Sc. Slobodan Šupić - Teaching Assistant at Faculty of Technical Sciences, University of Novi Sad

The purpose of this research is to create coarse artificial aggregate by alkali activation of fly ash for its use in cement concrete instead of natural aggregate. In this phase of study, the influence of the methods of production of coarse AAFA aggregate on its own characteristics and on basic properties of cement concrete has been investigated.  The objective of using domestic waste material as agglomerated by-product (aggregate) is to avoid using excessive amount of raw materials for various construction purposes. So far Serbia has dominantly used river aggregate for the production of concrete. It has caused problems with hydro-geological profiles of the riverbeds and consequently influenced research activities related to finding new sources of aggregates. On the other hand, approximately 7 million tons of fly ash is annually produced in thermal power plants in Serbia and only 3% is used in the cement industry. Until now about 300 million tons of the fly ash is disposed in landfills, occupying large area and generating environmental issues. One of the ways to reduce the fly ash disposal is production of artificial aggregate by alkali activation.  The artificial aggregates production is not only a good alternative for the natural aggregates preservation; it also provides an ecologically sustainable solution regarding waste management. It provides a benefits increase for industry branches that produce waste materials as they can turn them into a valuable resource.

 

Lecturer CV is available here.

Numerical simulations of the structural behavior under fire conditions

M.Sc. Igor Džolev - Teaching Assistant at the Faculty of Technical Sciences, University of Novi Sad

In addition to prescriptive and testing methods, current technical development allows the assessment of thermal and structural response to fire by calculation. Numerical codes considered for the analyses need to be able to incorporate realistic behavior of materials at elevated temperatures and nonlinear calculation procedures. Specialized software for fire analysis, based on Finite Element Method (FEM), such as SAFIR, VULCAN and OPENSEES are being developed at the universities worldwide. Also, some powerful general purpose commercial software, such as ANSYS and ABAQUS have also been validated by the performed test results. A rapidly growing hardware potential in the past decades has opened possibilities for numerical simulations of complex nonlinear systems to be widely accepted by both research facilities and developing industry.

 

Lecturer CV is available here.

With romanticism and persistence to great successes

Srđan Erceg, GM & Founder at HUGE Media

He started his career as a journalist in the Sports Journal in 1995, immediately after finishing high school. Working in daily newspapers in time before the Internet, he gained experience, which later shaped his approach to work in all other spheres of work. After journalism, he continued his career in the field of marketing at the Direct Media agency, where he moved from an assistant through executives, managers, analysts, and participated in laying the foundations of the information system. He is founder and co-owner of one of the leading digital marketing agencies in the region - Huge Media. He finds extreme pleasure in his second job - TV commentators for MotoGP and Formula 1 at the Sport Club channel.