1. Associate Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, 4044 Jonsson Engineering Center, 110 Eighth St., Troy, NY 12180-3590 (corresponding author).
2. Associate Professor and Director of Center for Extreme Load Effects on Structures, Dept. of Civil and Environmental Engineering, Virginia Polytechnic Institute and State Univ., 200 Patton Hall, Mail Stop 0105, Blacksburg, VA 24061.
3. Professor, Dept. of Civil, Structural, and Environmental Engineering, 230 Ketter Hall, State Univ. of New York at Buffalo, Buffalo, NY 14260-4300.
4. Professor, Dept. of Civil, Structural, and Environmental Engineering, 132 Ketter Hall, State Univ. of New York at Buffalo, Buffalo, NY 14260-4300.
5. Principal, Kircher and Associates, 1121 San Antonio Rd., Suite D-202, Palo Alto, CA 94303-4311.