1. Member, ASCE
2. Struct. Designer, Read Jones Christoffersen Ltd., 3rd Floor, 1285 West Broadway, Vancouver, BC, Canada V6H 3X8.
3. Assoc. Prof., Dept. of Civ. Engrg., Univ. of British Columbia, 2324 Main Mall, Vancouver, BC, Canada V6T 1Z4.
4. Assoc. Prof., Dept. of Civ. Engrg., Univ. of British Columbia, 2324 Main Mall, Vancouver, BC, Canada V6T 1Z4; corresponding author.
5. Res. Assoc., Dept. of Civ. Engrg., Univ. of British Columbia, 2324 Main Mall, Vancouver, BC, Canada V6T 1Z4.