1. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB, Canada T6G 1H9.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Hanyang Univ., Seoul 04763, South Korea (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB, Canada T6G 1H9.