1. Assistant Professor, Dept. of Bridge and Highways Engineering, National Univ. of Civil Engineering, 55 Giai Phong St., Hanoi 100000, Vietnam; formerly, Doctoral Student, Univ. of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816.
2. Professor, Dept. of Civil, Environmental and Construction Engineering, Univ. of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816; Visiting Professor, Bogazici Univ., Istanbul 34342, Turkey (corresponding author).