1. Doctoral Candidate, Dept. of Civil and Environmental Engineering, Colorado State Univ., Campus Delivery 1372, Fort Collins, CO 80523-1372 (corresponding author)..
2. Professor and Drummond Chair in Civil Engineering, Dept. of Civil, Construction, and Environmental Engineering, The University of Alabama, Box 870205, Tuscaloosa, AL 35487-0205. E-mail: jwvandelindt@eng.ua.edu