1. Dept. of Civil Engineering, Univ. of Ottawa, 161 Louis Pasteur Ave., Ottawa, ON, Canada K1N 6N5; formerly, Structural Engineer, Delcan Corporation (Structures Division), Ottawa, ON, Canada.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Ottawa, 161 Louis Pasteur Ave., Ottawa, ON, Canada K1N 6N5 (corresponding author).
3. Professor, Dept. of Civil Engineering, Univ. of Ottawa, 161 Louis Pasteur Ave., Ottawa, ON, Canada K1N 6N5.