1. Dept. of Civil and Materials Engineering (M/C 246), Univ. of Illinois at Chicago, Engineering Research Facility, 842 W. Taylor St., Chicago, IL 60607-7023 (corresponding author).
2. Associate Professor, Dept. of Civil and Materials Engineering (M/C 246), Univ. of Illinois at Chicago, Engineering Research Facility, 842 W. Taylor St., Chicago, IL 60607-7023.
3. Professor, Dept. of Civil Engineering, Indian Institute of Science, Bangalore 560012, India.