Head of the project: Ing. Čavajdová Kristína

Research team: prof. Ing. Vičan Josef, CSc., doc. Ing. Odrobiňák Jaroslav, PhD.

Duration: September 2021 – August 2022

The optimisation of the design method for verification of slender steel beam – columns is still current issue not only from the scientific point of view, but also for design practice field. Therefore, the main project objective is comparison of suitability of established design approaches, according to the European standards, on the basis of parametric numerical analyzes result. The experiment described below consists of pinned – fixed beam – column of rolled cross-section subjected to axial compressive force and bending moments which arises due to the eccentricity of compressive force. By verifying beam-column resistance using the geometrically and materially nonlinear analysis with imperfections included (GMNIA) and comparing results to the values obtained from the experiments of the beam-column resistances, it is possible to accurate recommendations for the use of different types of design procedures under currently applicable European standards.

Head of the project: Ing. Bartuš Jakub

Research team: doc. Ing. Odrobiňák Jaroslav, PhD.

Duration: September 2021 – August 2022

Series of laboratory experiments are proposed. The main purpose is to investigate the bending resistance and the shear flow distribution at steel-concrete interface of the composite castellated beams with asymmetric steel cross-section. Four specimens would be tested. Every specimen would consist of concrete slab and steel beam with web openings. The cross-section of steel element would be welded from two T parts, comprised of different hot-rolled cross-sections halves. The bonding between concrete and steel part would be provided by the shear connectors - headed studs. Load would be applied gradually in the form of 4-point flexure test procedure. The deformation parameters would be measured with strain gauges. For results validation, the finite numerical model would be performed. The results from the experiment and the finite element analysis would be compared. Outcomes from the experiment would be presented in the form of paper in impacted scientific journal and at conference, as well.

Head of the project: prof. Ing. Vičan Josef, CSc.

Research team: doc. Ing. Ďurčanská Daniela, CSc., Ing. Gocál Jozef, PhD., doc. Ing. Koteš Peter, PhD., Ing. Vavruš Martin, PhD.

Duration: April  2021 – March 2024

Current standard methods of reliability theory verify the reliability of structures in terms of limit states caused by permanent and variable resp. accidental loads on structures. Defects and damages of structures due to environmental loads in the form of material degradation during the design structural lifetime are taken into account indirectly or not at all. The absence of the methodology results from insufficiently verified models of material degradation. Therefore, the durability of bridge structures is ensured by the choice of suitable materials, the design of proven structural details, increasing the thickness of cross-sections, increasing the covering layer of reinforcement, as well as eliminating environmental effects by the proper protection of materials and structures. The project research intention is to prepare and develop a concept for the design of cross-sections and elements of steel and reinforced concrete bridge structures regarding to their durability and residual lifetime. Attention will be paid to the allowing for of environmental loads and fatigue cracks in the design of bridge structural elements with outputs in the form of corrosion models of structural and reinforcing steel and proposals for the rehabilitation of damaged structures.

Head of the project: Ing. Prokop Jozef, PhD.

Research team: doc. Ing. Odrobiňák Jaroslav, PhD., Ing. Farbák Matúš

Duration: September 2021 – August 2022

Experimental-numerical analysis of the behaviour of selected details and elements of steel bridges with implemented failures and imperfections with a focus on the possibility of extending the remaining life-time of the bridge, or the possibility of further reuse of elements or entire parts of the superstructure.