1. Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Univ. of Palermo, 90128 Palermo, Italy.
2. Researcher, Center for Territory, Environment and Construction, Dept. of Civil Engineering, Univ. of Minho, 4800-058 Guimarães, Portugal.
3. Assistant Professor, Center for Territory, Environment and Construction, Dept. of Civil Engineering, Univ. of Minho, 4800-058 Guimarães, Portugal.
4. Associate Professor, Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Area Infrastrutture Viarie, Univ. of Palermo, 90128 Palermo, Italy (corresponding author).