1. Assistant Professor, Dept. of Civil Engineering, Univ. of Celal Bayar, Manisa 45140, Turkey; formerly, Visiting Scholar, Dept. of Civil and Materials Engineering, Univ. of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607 (corresponding author).
2. Professor, Dept. of Civil and Materials Engineering, Univ. of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607.