1. Assistant Professor, Faculty of Civil and Geodetic Engineering, Univ. of Ljubljana, Jamova cesta 2, Ljubljana SI-1000, Slovenia (corresponding author).
2. Emeritus Professor, Faculty of Engineering and Built Environment, Univ. of Newcastle, Univ. Dr., Callaghan, New South Wales 2308, Australia.
3. Professional Officer, Faculty of Engineering and Built Environment, Univ. of Newcastle, Univ. Dr., Callaghan, New South Wales 2308, Australia.
4. Associate Professor, Faculty of Civil and Geodetic Engineering, Univ. of Ljubljana, Jamova cesta 2, Ljubljana SI-1000, Slovenia.