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)

(2015). An experimental investigation of laser scabbling of concrete. Construction and Building Materials, 89 (7), pp. 76-89. (Full Text).
(2015). Finite element modelling of split-Hopkinson pressure bar experiments on sand. (Full Text)., Abstract: Finite element modelling of confined split Hopkinson pressure bar (SHPB) tests on dry quartz sand have been carried out using LS-DYNA to assess the suitability of models *MAT_SOIL_AND_FOAM and *MAT_MOHR_COULOMB for simulating high-pressure transient events in soils. Both models were defined using...
(2014). Shake Table Tests on Deficient RC Buildings Strengthened Using Post? Tensioned Metal Straps. In Ilki A, Fardis MN (Ed.), Seismic Evaluation and Rehabilitation of Structures (Vol. 26, pp. 187-202), Abstract: In order to decide how badly an individual structure needs seismic upgrading or to prioritise the rehabilitation of a population of structures, a seismic evaluation or assessment of the as-built structure is necessary. Such an evaluation may be ...
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.

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