1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada (corresponding author).
2. Lecturer, Heriot-Watt Univ., Riccarton Campus, School of the Built Environment, WA 4.23, EH14 4AS, Edinburgh, Scotland.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada.