[1]Structural Engineering Department (ESTR), State University of Rio de Janeiro (UERJ), Rio de Janeiro 20550-900, Brazil;
[2]Civil Engineering Post-graduate Programme (PGECIV), State University of Rio de Janeiro (UERJ), Rio de Janeiro 20550-900,Brazil;
[3]Civil Engineering Department, University of Coimbra, Coimbra 3030-788, Portugal;