1. Associate Professor, Civil & Environmental Engineering Dept., The George Washington Univ., 801 22nd St., Washington, D.C. 20052 (corresponding author).
2. Design Engineer, e-Construct, 2111 South 67th St., Suite 200, Omaha, NE 68106.
3. Leslie D. Martin Professor, Dept. of Civil Engineering, Univ. of Nebraska–Lincoln, Lincoln, NE.
4. Consultant, Baker Engineering and Risk Consultants, Inc., San Antonio, TX.