1. Assistant Professor, Dept. of Civil and Environmental Engineering, 301 DuPont Hall, Univ. of Delaware, Newark, DE 19716 (corresponding author). E-mail: cmeehan@udel.edu
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616. E-mail: rwboulanger@ucdavis.edu
3. Univ. Distinguished Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 200 Patton Hall, Blacksburg, VA 24061. E-mail: jmd@vt.edu