1. Associated Researcher, Civil Engineering Graduate Program, Federal Univ. of Brasil at Rio Grande do Sul-UFRGS, R. João Abbott, 516/501, 90460-150, Porto Alegre, RS, Brasil.
2. Professor, Civil Engineering Graduate Program, Federal Univ. of Brasil at Rio Grande do Sul-UFRGS, Av. Osvaldo Aranha, 99, 3° andar, 90035-190, Porto Alegre, RS, Brasil.