1. Associate Professor, Dept. of Civil Engineering, Univ. of Minho, Azurém, 4800-058 Guimarães, Portugal.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Minho, Azurém, 4800-058 Guimarães, Portugal.
3. Full Professor, Dept. of Construction Engineering, Technical Univ. of Catalonia, c/Gran Capitán s/n, mod. C1, 08034 Barcelona, Spain.
4. Full Professor, Faculty of Civil Engineering, Univ. of Colima, km 9, Colima-Coquimatlán way, 28400, Mexico; formerly, PhD Student, Dept. of Civil Engineering, Univ. of Minho, Azurém, 4800-058 Guimarães, Portugal.