1. Graduate Student, Civil and Environmental Engineering, Cornell Univ., Hollister Hall, Ithaca, NY 14853-3501 (corresponding author).
2. Senior Lecturer, Civil and Environmental Engineering, Cornell Univ., Hollister Hall, Ithaca, NY 14853-3501.
3. Facilities Manager, Civil and Environmental Engineering, Cornell Univ., Hollister Hall, Ithaca, NY 14853-3501.
4. Professor, Civil and Environmental Engineering, Cornell Univ., Hollister Hall, Ithaca, NY 14853-3501.