1. Assistant Professor, Dept. of Civil Engineering, School of Engineering, Univ. of Minho, DEC Campus de Azurém, 4800-058 Guimarães, Portugal (corresponding author).
2. Full Professor, Dept. of Civil Engineering, School of Engineering, Univ. of Minho, DEC Campus de Azurém, 4800-058 Guimarães, Portugal.
3. Assistant Professor, Dept. of Information Systems, School of Engineering, Univ. of Minho, DSI Campus de Azurém, 4800-058 Guimarães, Portugal.
4. Full Professor, Faculty of Engineering, Dept. of Civil Engineering, Univ. of Porto, Rua Dr. Roberto Frias, s/n 4200-465 Porto, Portugal.