1. Project Engineer, Thurber Engineering Ltd., Edmonton AB, Canada T6E 6A5; formerly, PhD Candidate, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London ON, Canada N6A 5B9.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London, Ontario, Canada N6A 5B9 (corresponding author).
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London, Ontario, Canada N6A 5B9.