1. Senior Engineer, Thornton Tomasetti, Inc., 40 Wall St., New York, NY 10005 (corresponding author).
2. Associate Professor, Dept. of Civil Engineering, Univ. of Mississippi, 106 Carrier Hall, Oxford, MS 38677-1848.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Massachusetts Amherst, 130 Natural Resources Rd., Amherst, MA 01003.
4. Santiago and Robertina Calatrava Family Professor and Chair, Dept. of Civil Engineering and Engineering Mechanics, Columbia Univ., 500 West 120th St., New York, NY 10027.