1. Civil Engineer, Estradas de Portugal, S. A., Praça da Portagem, 2809-013 Almada, Portugal.
2. Full Professor, Civil Engineering, Architecture and Georesources Dept., Instituto Superior Técnico/ICIST, Technical Univ. of Lisbon, Ave. Rovisco Pais, 1049-001 Lisboa, Portugal.
3. Associate Professor, Civil Engineering, Architecture and Georesources Dept., Instituto Superior Técnico/ICIST, Technical Univ. of Lisbon, Ave. Rovisco Pais, 1049-001 Lisboa, Portugal (corresponding author).