Dr Mihail Petkovski

Lecturer in Structural Dynamics

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

Telephone: +44 (0) 114 222 5759
Fax: +44 (0) 114 222 5700

Email: m.petkovski@sheffield.ac.uk

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).

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 mac^2T, 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.

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.

Selected Publications

Sabbagh, A. B., Petkovski, M., Pilakoutas, K., & Mirghaderi, R. (2012). Development of cold-formed steel elements for earthquake resistant moment frame buildings. Thin-Walled Structures, (53), April, pp 99-108. ISSN 0263-8231. DOI 10.1016/j.tws.2012.01.004

Sabbagh, A. B., Petkovski, M., Pilakoutas, K., & Mirghaderi, R. (2011). Ductile moment-resisting frames using cold-formed steel sections: An analytical investigation. Journal of Constructional Steel Research, 67(4), April, pp 634-646. ISSN 0143-974X. DOI 10.1016/j.jcsr.2010.11.016

Petkovski, M. (2010). Effects of stress during heating on strength and stiffness of concrete at elevated temperature. Cement and Concrete Research, 40, December, pp 1744-1755. ISSN: 0008-8846. DOI 10.1016/j.cemconres.2010.08.016

Petkovski, M., & Crouch, R. (2008). Strains under transient hygro-thermal states in concrete loaded in multiaxial compression and heated to 250oC. Cement and Concrete Research, 38, April, pp 586-596. ISSN: 0008-8846. DOI 10.1016/j.cemconres.2007.10.008

Petkovski, M., Crouch, R. S., & Waldron, P. (2006). Apparatus for testing concrete under multiaxial compression at elevated temperature (mac2T). Experimental Mechanics, 46, June, pp 387-398. ISSN 0014-4851. DOI 10.1007/s11340-006-7463-8

Selected Research Grants and Funding from Industry

2009-2014: “Dynamic Performance of Large Civil Engineering Structures: An Integrated Approach to Management, Design and Assessment” funded by EPSRC. Investigators: A Pavic (Principal Investigator, PI), JMW Brownjohn, M Petkovski and P Reynolds. Value: £779,987.
2010-2013: “Microstructural changes in concrete subjected to load and elevated temperature”, funded by EPSRC: Nuclear FiRST, Investigators: R Stein, M Petkovski (project supervisor), Value: £30,000.
2009-2011: “Concrete under multiaxial stress: (1) effect of loading history on stress-strain behaviour, (2) Induced anisotropy, (3) effects of fibre reinforcement, (4) shapes of yield surfaces” funded by MoD/QinetiQ (Anglo-French programme MCM-ITP). Investigator: M Petkovski. Value: £85,000.
2007-2011: “Cold formed (thin–walled) steel elements for earthquake resistant frame buildings”, funded by Corus/Tata Steel. Investigators: AB Sabbagh and M Petkovski (project supervisor), Value: £45,000.
2008: “Review of Research on Concrete Properties under Multiaxial Stress at Elevated Temperature – mac2T and MAECENAS projects”, funded by British Energy Generation (UK) Ltd. Investigators: M Petkovski and R Crouch, Value: £23,000.
2005-2008: “Concrete under Multiaxial Extension: Influence of loading path, stress/strain history and moisture content”. MoD/QinetiQ (Anglo-French programme HTR). Investigator: M Petkovski. Value: £72,000.
2003-2005: “PCPV and PCCV Materials behaviour under Multi-Axial Loading Combined with Elevated Temperature: LITS/Creep Behaviour, effects of thermal cycling and link between LITS and damage”, funded by British Energy Generation (UK) Ltd. Investigators: M Petkovski (PI), P. Waldron and R Crouch. Value: £220,000

Teaching

MAS252: Further Civil Engineering Mathematics and Computing (with Dr Istvan Ballai)
CIV226: Civil and Structural Engineering Design
CIV6440: Design of Earthquake Resistant Structures