1. Research Fellow, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Padova, via Marzolo 9, 35131 Padova, Italy (corresponding author).
2. Lecturer, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1010, New Zealand.
3. Research Fellow, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Padova, via Marzolo 9, 35131 Padova, Italy.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1010, New Zealand.
5. Associate Professor, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Padova, via Marzolo 9, 35131 Padova, Italy.