1. Ph.D. Student and Master in Construction, Dept. of Civil Engineering and Architecture, Section of Construction, IST-Technical Univ. of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
2. Full Professor, Dept. of Civil Engineering and Architecture, Section of Construction, IST-Technical Univ. of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal (corresponding author).