1. Member, ASCE
2. Grad. Student, Dept. of Civ. Engrg., Johns Hopkins Univ., 207 Latrobe Hall, 3400 N. Charles St., Baltimore, MD 21218. E-mail: jmain@jhu.edu
3. Prof. and Chair, Dept. of Civ. Engrg., Johns Hopkins Univ., 207 Latrobe Hall, 3400 N. Charles St., Baltimore, MD 21218. E-mail: nick@jhu.edu