1. Dept. of Civil Engineering, Federal Univ. of Bahia, Barreiras, Bahia, Brazil.
2. Dept. of Civil Engineering, Federal Univ. of Paraná, Curitiba, Paraná, Brazil; and DCC/UFPR, Centro Politécnico, Jardim das Américas, CEP: 81531-980, Curitiba, Paraná, Brazil (corresponding author).
3. Dept. of Civil Engineering, Federal Univ. of Paraná, Curitiba, Paraná, Brazil.
4. Dept. of Civil Construction Engineering, Univ. of São Paulo, São Paulo, Brazil.
5. Structures and Civil Construction Dept., Federal Univ. of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.