1. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Delaware, 301 Dupont Hall, Newark, DE 19716 (corresponding author).
2. Professor and Chair, Dept. of Civil and Environmental Engineering, Univ. of Delaware, 301 Dupont Hall, Newark, DE 19716.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Delaware, 301 Dupont Hall, Newark, DE 19716.