1. Ph.D. Candidate, Dept. of Civil Construction Engineering, Univ. of São Paulo, Av. Prof. Almeida Prado, tr. 2, 83, São Paulo SP 05508-900, Brazil (corresponding author).
2. Associate Professor, Dept. of Civil Construction Engineering, Univ. of São Paulo, Av. Prof. Almeida Prado, tr. 2, 83, São Paulo SP 05508-900, Brazil.