1. Kleinfelder/SEA Consultants, 215 First St., Suite 320, Cambridge, MA 02142; formerly, Ph.D. Student, Civil & Environmental Engineering Dept., 400 Snell Engineering Center, Northeastern Univ., Boston, MA 02115.
2. Assistant Professor, Civil & Environmental Engineering Dept., 400 Snell Engineering Center, Northeastern Univ., Boston, MA 02115 (corresponding author).