1. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801.
2. Dean of The Fu Foundation School of Engineering and Applied Science and Morris A. and Alma Schapiro Professor of Civil Engineering and Engineering Mechanics, Earth, and Environmental Engineering and Computer Science, Columbia Univ., 510 Southwest Mudd Building, 500 West 120th St., New York, NY 10027.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2340 G.G. Brown Building, Ann Arbor, MI 48109 (corresponding author).
4. Infrastructure Project Director, ConConcreto S.A, Carrera 43A 18Sur-135 Piso 4, Medellin, Colombia.