Assoc. Prof. Sebastjan Bratina, PhD


Contact: +386 1 4768 598


Curriculum Vitae (CV):

Sebastjan Bratina was born in 1974. After finishing primary and secondary school in Nova Gorica, he enrolled in the Faculty of Civil and Geodetic Engineering, University of Ljubljana (UL FGG), where he graduated in 1998. During his studies he received the Zois Scholarship as an incentive for outstanding performance. As a young researcher, he continued his doctoral studies at UL FGG and completed them in 2003. For his dissertation he received a prize awarded for the best diploma, master or doctoral theses by the company Trimo, d. d., from Trebnje. In 2002, he took the position of assistant at the Chair of Concrete, Masonry and Timber Structures (KMLK) at UL FGG, and was promoted to higher education teacher in 2015. Independently or together with his colleagues, he gives lectures and seminars in six specialised courses in the field of concrete structures. He has served as Deputy Head of KMLK since 2013 and has also been member of the UL FGG Senate since 2017. Since 2015 he has been trustee of the Master Study Programme Civil Engineering at UL FGG. He has been supervisor or co-supervisor in more than 60 diploma works and two PhD theses. In the field of international cooperation, he was a visiting professor at the Technical University of Prague and at the Faculty of Civil Engineering in Rijeka, Croatia.

As part of his scientific research work, he is involved in the numerical analysis and modelling of characteristic nonlinear phenomena in reinforced concrete and prestressed structures under normal and fire conditions. These include mainly: ultimate load-bearing capacity, material softening, localization of deformations, tensile stiffness of concrete, occurrence and propagation of cracks, geometric nonlinearity, slippage at the contact between reinforcing bar (cable) and concreate sheathing, creep, shrinkage, temperature deformations, viscous creep and others. He has published more than 150 bibliographic units in his field of research. As author or co-author, he has published 25 articles in peer-reviewed journals (of that 15 articles in SCI journals), 9 scientific papers in internationals and 27 scientific papers at national scientific conferences. He had 1 invited lecture in an international conference. The relevance of his scientific work and integration into the international sphere is confirmed by more than 150 pure citations of his works in the WoS database in the last 10 years. Together with his colleagues he developed the mathematical model and the computer program NFIRA, which is intended for the analysis of the mechanical response of reinforced concrete and prestressed structures under normal and fire conditions. He has presented the theoretical background, efficiency and suitability of the developed model, among others, in the following four scientific papers published in SCI journals:

Bratina S., Čas B., Saje M., Planinc I., “Numerical modelling of behaviour of reinforced concrete columns in fire and comparison with Eurocode 2”, International Journal of Solids and Structures, 42(21-22), 5715–5733, 2005. The article has 46 pure citations in the WoS database.

Bratina S., Saje M., Planinc I., “The effects of different strain contributions on the response of RC beams in fire”, Engineering Structures, 29(3), 418–430, 2007.  The article has 36 pure citations in the WoS database.

Markovič M., Krauberger N., Saje M., Planinc I., Bratina S., “Non-linear analysis of pre-tensioned concrete planar beams”, Engineering Structures 46: 279–293, doi: 10.1016/j.engstruct.2012.08.004, 2013. The article has 9 pure citations in the WoS database.

Bajc U., Saje M., Planinc I., Bratina S., “Semi-analytical buckling analysis of reinforced concrete columns exposed to fire”, Fire Safety Journal, 71, 110–122, doi: 10.1016/j.firesaf.2014.11.018, 2015. The article has 13 pure citations in the WoS database.

The developed model was also used to simulate the response of existing and planned concrete structures in fire conditions (e.g. Šentvid tunnel, second Karavanke tunnel tube, tunnels and bridging structures on the second track Divača-Koper and others).

In 2003 he passed the professional examination for responsible design according to the Construction Act. He regularly cooperates with a large number of building designers through advice and consultations. As of this year, he is also additionally employed by Irgo Consulting, d. o. o., where he provides professional support in the field of planning, analysis and design of building structures and performs internal reviews of building projects. He is also a member of some professional and scientific associations. From 2014 to 2020 he was member of the Publishing Council of the journal Gradbeni vestnik, and in 2020 he became Editor-in-Chief of this journal. One of his main goals is the inclusion of Gradbeni vestnik in the international bibliographic database SCOPUS.