1. Professor and Holder of the Buchanan Chair, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136(corresponding author). E-mail: briaud@tamu.edu
2. Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
3. Ph.D. Candidate, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
4. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Davis Hall, Univ. of California, Berkeley, CA 94720–1710.