1. Assistant Professor, Dept. of Civil Engineering, Dept. of Civil and Environmental Engineering and Architecture, Univ. of Parma, via Usberti 181/A, 43100 Parma, Italy.
2. Ph.D. Researcher, Faculty of Civil Engineering and Geosciences, Dept. of Structural Engineering, Delft Univ. of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands.
3. Professor, Faculty of Civil Engineering and Geosciences, Dept. of Structural Engineering, Delft Univ. of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands (corresponding author).