Affiliation: | [1]Department of Environmental and Civil Engineering, University of Brasilia, Brasilia/DF 70910-900, Brazil; [2]School of Civil Engeneering, Federal University of Goi6s, Goidnia/GO 74605-22, Brazil; [3]Department of Technical Support and Control, Furnas Centrals Eldtricas, Aparecida de Goidnia/GO 74001-970, Brazil |