1. Professor, Dept. of Civil and Environmental Engineering, Univ. of Utah, 122 South Central Campus Dr., Ste. 104 CME, Salt Lake City, UT 84112 (corresponding author). E-mail: chris@civil.utah.edu
2. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Utah, 122 South Central Campus Dr., Ste. 104 CME, Salt Lake City, UT 84112. E-mail: osuke@hotmail.com
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Utah, 122 South Central Campus Dr., Ste. 104 CME, Salt Lake City, UT 84112. E-mail: reaveley@civil.utah.edu