1. Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
2. Escuela Técnica Superior de Edificación, Universidad Politécnica de Madrid, Av. Juan de Herrera 6, 28040 Madrid, Spain
3. Construct-Departamento de Engenharia Civil, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal