1. Former Graduate Student, Dept. of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616.
2. Professor, Dept. of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616 (corresponding author).
3. Research Assistant, Dept. of Civil Engineering, Istanbul Technical Univ., Maslak, Istanbul 34469, Turkey; formerly, Visiting Research Scholar, Dept. of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616.