1. Research Associate, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590.
3. Engineer, O’Neal Inc., 10 Falcon Crest Dr., Greenville, SC 29607.