1. Student, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 Univ. Ave. W., Waterloo, ON, Canada N2L 3G1.
2. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 Univ. Ave. W., Waterloo, ON, Canada N2L 3G1 (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 Univ. Ave. W., Waterloo, ON, Canada N2L 3G1.
4. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado Boulder, Boulder, CO 80309.
5. Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, Austin, TX 78712.