Concrete and Earthquake Engineering Research Group

Department of Civil & Structural Engineering

Dr Mihail Petkovski

Lecturer

Contact

m.petkovski@sheffield.ac.uk

Department of Civil and Structural Engineering
Sir Frederick Mappin Building
Mappin Street,
Sheffield,
S1 3JD

Profile

After graduating from Sts Cyril and Methodius University in 1982, Mihail Petkovski worked for 11 years in the Institute for Earthquake Engineering and Engineering Seismology (IZZIS) in Macedonia, as a research associate (1982-1990) and lecturer (1990-1993). He worked on research projects involving (i) quasi-static tests of steel structure assemblies, (ii) in-situ dynamic testing of full scale structures and (iii) shaking table testing of reduced scale models of concrete and masonry buildings and prototypes of structures for high-voltage networks and equipment for nuclear power plants. During this period Mihail obtained an MSc degree in Earthquake Engineering.

Mihail joined The University of Sheffield in 1993 as a PhD Student. In 1997 he was employed by as a research associate in the Department of Civil and Structural Engineering. In the period between 1997 and 2001 he developed mac2T, Sheffield’s unique facility for multiaxial compression of concrete at elevated temperature. Mihail designed and commissioned the hardware and wrote the software for data acquisition and control of the rig. In the last 10 years mac2T was used for over 300 complex multi-stage experiments, in a succession of research projects funded by EPSRC, EU, UK government and Industry (Nuclear Electric/British Energy, MOD/QinetiQ). In 2007 Mihail was appointed Lecturer in Structural Dynamics in the Department of Civil and Structural Engineering at The University of Sheffield.

Recent activities and achievements

Mihail’s research interests are:

Experimental continuum mechanics of pressure sensitive materials:

  • concrete at elevated temperature: effects of heat-load regimes on mechanical properties and changes in the microstructure of concrete, with a focus on LITS (load induced thermal strain);
  • concrete and rock under multiaxial compression: relationship between development of damage in the material and the macroscopically observed stress-strain behaviour (of test specimens).

Earthquake engineering of multi-storey buildings:

  • structural systems for improved seismic behaviour of buildings: connections and plastic hinge regions in steel and concrete frames;
  • systems for control of the seismic response of frames: passive friction/yield connections and semi-active control.

Qualifications

PhD, University of Sheffield
MSc, Earthquake Engineering, Sts. Cyril and Methodius University, Macedonia
MEng, Civil and Structural Engineering, Sts. Cyril and Methodius University, Macedonia

Publication(s)

Sabbagh AB, Petkovski M, Pilakoutas K, Mirghaderi R (2013). Cyclic behaviour of bolted cold-formed steel moment connections: FE modelling including slip. Journal of Constructional Steel Research, 80 (Paper No. 2222 (in USB key)), pp. 100-108, Abstract: In this paper a Finite Element (FE) procedure is described for simulating hysteretic moment?rotation behaviour and failure deformations of bolted cold-formed steel (CFS) moment connections. One of the main challenges in modelling the response of bolted connections is the presence of bolt slip. A...
(2013). Experimental detection of damage evolution in concrete under multiaxial compression. Journal of Engineering Mechanics, 139 (5), pp. 612-628, Abstract: The nonlinear inelastic stress-strain relationship of concrete is a result of changes to the fabric of the material caused by several damage mechanisms. Existing experimental research on concrete provides very little information on the evolution of these mechanisms. Instead, most experimental...
(2013). Pore space and brittle damage evolution in concrete. Engineering Fracture Mechanics, 110 (25), pp. 378-395.
Stein RC, Petkovski M, Engelberg DL, Leonard F, Withers PJ (2013). Characterizing the effects of elevated temperature on the air void pore structure of advanced gas-cooled reactor pressure vessel concrete using x-ray computed tomography. In EPJ Web of Conferences (pp. 1-7), Abstract: X-ray computed tomography (X-ray CT) has been applied to nondestructively characterise changes in the microstructure of a concrete used in the pressure vessel structure of Advanced Gas-cooled Reactors (AGR) in the UK. Concrete specimens were conditioned at temperatures of 105 °C and 250 °C, to...
(2013). Strain rate and moisture effects on sand response. In 1st UK Defence Seminar on the High Strain Rate Properties of Soils and Granular Media , Abstract: As part of the UK MoD Force Protection Engineering programme, research has been conducted looking into the fundamental driving forces behind large scale physics. This has involved conducting both quasi-static (Mac2T) and dynamic (Split Hopkinson Pressure Bar) on sands of varying moisture contents...
(2013). Friction-based semi-active control of multi-storey frames. In Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures.
(2013). Briefing: UK Ministry of Defence force protection engineering programme. Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics, 166 (EM3), pp. 119-123. (Full Text)., Abstract: The Defence Science and Technology Laboratory sponsored, QinetiQ-led Force Protection Engineering Research Programme has two main strands, applied and underpinning research. The underpinning strand is led by Blastech Ltd. One focus of this research is into the response of geomaterials to threat...
(2012). Development of cold-formed steel elements for earthquake resistant moment frame buildings. Thin-Walled Structures, 53 (3), pp. 99-108, Abstract: The development of thin-walled cold-formed steel (CFS) sections as energy dissipative elements for seismic moment-resisting multi-storey frame buildings is presented through FE analysis and experimental work. Studies on different structural levels are undertaken. At the element level, increasing...

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