1. Research Associate, Dept. of Civil Engineering, Univ. of British Columbia, 6250 Applied Science Ln., Vancouver BC, Canada V6T 1Z4. E-mail: laurel.richl@uma.aecom.com
2. Professor, Dept. of Civil Engineering, Univ. of British Columbia, 6250 Applied Science Ln., Vancouver BC, Canada V6T 1Z4. E-mail: tsayed@civil.ubc.ca