1. M.A.Sc. Student, Dept. of Civil Engineering, Univ. of British Columbia, 6250 Applied Science Ln., Vancouver, BC, Canada V6T 1Z4.
2. Professor, Dept. of Civil Engineering, Univ. of British Columbia, 6250 Applied Science Ln., Vancouver, BC, Canada V6T 1Z4.
3. M.A.Sc. Student, School of Engineering, Univ. of British Columbia, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
4. Associate Professor, School of Engineering, Univ. of British Columbia, 3333 University Way, Kelowna, BC, Canada V1V 1V7 (corresponding author).